free ggml scheduler/compute scratch memory after run#150

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Merged
cjpais merged 4 commits into from
Aug 30, 2026
Merged

free ggml scheduler/compute scratch memory after run #150

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f444f5f
free ggml scheduler/compute scratch memory after run
cjpais Aug 30, 2026
8eaf820
clang format
cjpais Aug 30, 2026
b0b08d3
more unified cleanup handling
cjpais Aug 30, 2026
1b0588e
nit
cjpais Aug 30, 2026
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9 changes: 6 additions & 3 deletions docs/environment-variables.md
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Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down
5 changes: 2 additions & 3 deletions src/arch/canary/canary.h
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Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;
ggml_tensor * encoder_out = nullptr;
ggml_tensor * encoder_out = nullptr;

CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

CanarySession() = default;
~CanarySession() override;
void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary
12 changes: 4 additions & 8 deletions src/arch/canary/model.cpp
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Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
kv_cache.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
encoder_out = nullptr;
}

Expand Down
3 changes: 0 additions & 3 deletions src/arch/canary_qwen/canary_qwen.h
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Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

transcribe::causal_lm::KvCache kv_cache;

// Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down
8 changes: 0 additions & 8 deletions src/arch/canary_qwen/model.cpp
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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
kv_cache.free();
kv_cache_batch.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down
5 changes: 2 additions & 3 deletions src/arch/cohere/cohere.h
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Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;
ggml_tensor * encoder_out = nullptr;
ggml_tensor * encoder_out = nullptr;

// KV cache for the decoder.
CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

CohereSession() = default;
~CohereSession() override;
void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere
12 changes: 4 additions & 8 deletions src/arch/cohere/model.cpp
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Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
kv_cache.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
encoder_out = nullptr;
}

Expand Down
3 changes: 0 additions & 3 deletions src/arch/funasr_nano/funasr_nano.h
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Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

transcribe::causal_lm::KvCache kv_cache;

// Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down
8 changes: 0 additions & 8 deletions src/arch/funasr_nano/model.cpp
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Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
kv_cache.free();
kv_cache_batch.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down
4 changes: 1 addition & 3 deletions src/arch/gigaam/gigaam.h
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Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

ggml_tensor * encoder_out = nullptr;

std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

GigaamSession() = default;
~GigaamSession() override;
void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam
14 changes: 4 additions & 10 deletions src/arch/gigaam/model.cpp
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Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
if (gm == nullptr || gm->plan.scheduler_list.empty()) {
return TRANSCRIBE_ERR_INVALID_ARG;
}

if (gc->poll_abort()) {
return TRANSCRIBE_ERR_ABORTED;
}
Expand Down
3 changes: 0 additions & 3 deletions src/arch/granite/granite.h
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Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

// Audio encoder output (post-projector) buffered between encode and
// decode. Each row is one audio token in LM hidden space (2048).
std::vector<float> mel_buf;
Expand Down
8 changes: 0 additions & 8 deletions src/arch/granite/model.cpp
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Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
kv.free();
kv_batch.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

GraniteModel::~GraniteModel() {
Expand Down
3 changes: 0 additions & 3 deletions src/arch/granite_nar/granite_nar.h
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Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

// Encoder output buffered between encode and projector/LM.
std::vector<float> mel_buf;
std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down
11 changes: 1 addition & 10 deletions src/arch/granite_nar/model.cpp
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Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
if (bn_fused_ctx != nullptr) {
Expand Down
4 changes: 1 addition & 3 deletions src/arch/medasr/medasr.h
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Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

ggml_tensor * encoder_out = nullptr;

std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

MedAsrSession() = default;
~MedAsrSession() override;
void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr
13 changes: 4 additions & 9 deletions src/arch/medasr/model.cpp
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Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
encoder_out = nullptr;
}

Expand Down
8 changes: 0 additions & 8 deletions src/arch/moonshine/model.cpp
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Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
kv_cache.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

MoonshineModel::~MoonshineModel() {
Expand Down
3 changes: 0 additions & 3 deletions src/arch/moonshine/moonshine.h
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Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

// Host-side mirror of the encoder output. Required because the
// cross-KV graph runs in a fresh compute_ctx that does not share
// tensor handles with the encoder graph.
Expand Down
8 changes: 0 additions & 8 deletions src/arch/moonshine_streaming/model.cpp
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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
kv_cache.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down
3 changes: 0 additions & 3 deletions src/arch/moonshine_streaming/moonshine_streaming.h
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Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

// Host-side mirror of the post-adapter encoder hidden. The adapter
// pos_emb add (and proj when present) is applied once per session;
// this host buffer feeds the cross_kv precompute graph.
Expand Down
8 changes: 0 additions & 8 deletions src/arch/moss/model.cpp
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Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
kv_cache.free();
kv_cache_batch.free();
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
}

MossModel::~MossModel() {
Expand Down
3 changes: 0 additions & 3 deletions src/arch/moss/moss.h
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Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
ggml_context * compute_ctx = nullptr;
ggml_backend_sched_t sched = nullptr;

transcribe::causal_lm::KvCache kv_cache;

// Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down
17 changes: 5 additions & 12 deletions src/arch/parakeet/model.cpp
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Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
// Tear down per-call compute state before the model's backend plan
// (which outlives the context): scheduler, then context.
if (sched != nullptr) {
safe_sched_free(sched);
sched = nullptr;
}
if (compute_ctx != nullptr) {
ggml_free(compute_ctx);
compute_ctx = nullptr;
}
encoder_out = nullptr;

// Streaming cache tensors live in their own ggml_context + backend
// buffer. Free buffer first (may hold a backend ref), then the ctx.
if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
// Teardown order: ctx_meta → backend_buffer → plan backends. The
// buffer must be freed before the backends (it holds a backend ref);
Expand Down
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free ggml scheduler/compute scratch memory after run#150

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 Merged

cjpais
merged 4 commits into

from

Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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 Merged

cjpais
merged 4 commits into

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Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

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8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
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terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

cjpais
merged 4 commits into

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Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
Loading
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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 Merged

cjpais
merged 4 commits into

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Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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free ggml scheduler/compute scratch memory after run#150

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 Merged

cjpais
merged 4 commits into

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Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
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}
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
free ggml scheduler/compute scratch memory after run#150

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 Merged

cjpais
merged 4 commits into

from

Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
Expand Down

11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
Expand Down

4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
Expand Down

3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
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// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
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.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
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}
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document.addEventListener('keydown', function(e) {
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enabled = !enabled;
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} else {
removeDarkMode();
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}
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applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
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applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
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})();
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 Merged

cjpais
merged 4 commits into

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Aug 30, 2026
 Merged


free ggml scheduler/compute scratch memory after run
#150
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f444f5f

free ggml scheduler/compute scratch memory after run


cjpais Aug 30, 2026
8eaf820

clang format


cjpais Aug 30, 2026
b0b08d3

more unified cleanup handling


cjpais Aug 30, 2026
1b0588e

nit


cjpais Aug 30, 2026

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9 changes: 6 additions & 3 deletions
docs/environment-variables.md

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,12 +81,15 @@ its var is unset. Convention: `TRANSCRIBE_<FAMILY>_GGUF`.
| Variable | Test(s) |
| --- | --- |
| `TRANSCRIBE_PARAKEET_GGUF` | `parakeet_real_smoke`, `decoder_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke` |
| `TRANSCRIBE_PARAKEET_UNIFIED_GGUF` | `parakeet_buffered_stream_eos_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_GIGAAM_GGUF` | `gigaam_workspace_release_smoke` |
| `TRANSCRIBE_MULTITALKER_BUNDLE_GGUF` | `parakeet_multitalker_e2e_smoke` |
| `TRANSCRIBE_SORTFORMER_GGUF` | `sortformer_stream_ext_unit` |
| `TRANSCRIBE_COHERE_GGUF` | `cohere_real_smoke`, `cohere_e2e_smoke` |
| `TRANSCRIBE_WHISPER_GGUF` | `whisper_e2e_smoke`, `whisper_tokenize_parity` |
| `TRANSCRIBE_QWEN3_ASR_GGUF` (+ `_0_6B_GGUF` / `_1_7B_GGUF`) | qwen3_asr smokes / parity |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke` |
| `TRANSCRIBE_MOONSHINE_STREAMING_TINY_GGUF` | moonshine_streaming smokes, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_VOXTRAL_REALTIME_GGUF` | `voxtral_realtime_real_smoke`, `stream_offline_interleave_smoke` |
| `TRANSCRIBE_WHISPER_BIN_*` | whisper.cpp `.bin` parser/e2e fixtures |

Other test/tooling vars:
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/canary/canary.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,7 @@ struct CanaryModel final : public transcribe_model {
};

struct CanarySession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 CanaryKvCache kv_cache;

Expand All@@ -142,6 +140,7 @@ struct CanarySession final : public transcribe_session {

 CanarySession() = default;
 ~CanarySession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::canary

12 changes: 4 additions & 8 deletions
src/arch/canary/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -45,14 +45,10 @@ static_assert(std::is_base_of_v<transcribe_session, CanarySession>);

CanarySession::~CanarySession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CanarySession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand Down

3 changes: 0 additions & 3 deletions
src/arch/canary_qwen/canary_qwen.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -95,9 +95,6 @@ struct CanaryQwenModel final : public transcribe_model {
};

struct CanaryQwenSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

8 changes: 0 additions & 8 deletions
src/arch/canary_qwen/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, CanaryQwenSession>);
CanaryQwenSession::~CanaryQwenSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

CanaryQwenModel::~CanaryQwenModel() {
Expand Down

5 changes: 2 additions & 3 deletions
src/arch/cohere/cohere.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -153,9 +153,7 @@ struct CohereModel final : public transcribe_model {
};

struct CohereSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;
 ggml_tensor * encoder_out = nullptr;
 ggml_tensor * encoder_out = nullptr;

 // KV cache for the decoder.
 CohereKvCache kv_cache;
Expand All@@ -174,6 +172,7 @@ struct CohereSession final : public transcribe_session {

 CohereSession() = default;
 ~CohereSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::cohere

12 changes: 4 additions & 8 deletions
src/arch/cohere/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,14 +48,10 @@ static_assert(std::is_base_of_v<transcribe_session, CohereSession>);

CohereSession::~CohereSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void CohereSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

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3 changes: 0 additions & 3 deletions
src/arch/funasr_nano/funasr_nano.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -74,9 +74,6 @@ struct FunAsrNanoModel final : public transcribe_model {
};

struct FunAsrNanoSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
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8 changes: 0 additions & 8 deletions
src/arch/funasr_nano/model.cpp

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Expand Up@@ -46,14 +46,6 @@ static_assert(std::is_base_of_v<transcribe_session, FunAsrNanoSession>);
FunAsrNanoSession::~FunAsrNanoSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

FunAsrNanoModel::~FunAsrNanoModel() {
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4 changes: 1 addition & 3 deletions
src/arch/gigaam/gigaam.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,9 +65,6 @@ struct GigaamModel final : public transcribe_model {
// Concrete context. One scheduler + compute_ctx lifecycle per context,
// mirroring parakeet.
struct GigaamSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -76,6 +73,7 @@ struct GigaamSession final : public transcribe_session {

 GigaamSession() = default;
 ~GigaamSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::gigaam

14 changes: 4 additions & 10 deletions
src/arch/gigaam/model.cpp

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Expand Up@@ -41,15 +41,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GigaamModel>);
static_assert(std::is_base_of_v<transcribe_session, GigaamSession>);

GigaamSession::~GigaamSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
GigaamSession::~GigaamSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void GigaamSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

Expand DownExpand Up@@ -321,7 +316,6 @@ transcribe_status run(transcribe_session * session, const float * pcm, int n_sam
 if (gm == nullptr || gm->plan.scheduler_list.empty()) {
 return TRANSCRIBE_ERR_INVALID_ARG;
 }

 if (gc->poll_abort()) {
 return TRANSCRIBE_ERR_ABORTED;
 }
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3 changes: 0 additions & 3 deletions
src/arch/granite/granite.h

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Expand Up@@ -104,9 +104,6 @@ struct GraniteModel final : public transcribe_model {
};

struct GraniteSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Audio encoder output (post-projector) buffered between encode and
 // decode. Each row is one audio token in LM hidden space (2048).
 std::vector<float> mel_buf;
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8 changes: 0 additions & 8 deletions
src/arch/granite/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -41,14 +41,6 @@ static_assert(std::is_base_of_v<transcribe_session, GraniteSession>);
GraniteSession::~GraniteSession() {
 kv.free();
 kv_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

GraniteModel::~GraniteModel() {
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3 changes: 0 additions & 3 deletions
src/arch/granite_nar/granite_nar.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,9 +56,6 @@ struct GraniteNarModel final : public transcribe_model {
};

struct GraniteNarSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Encoder output buffered between encode and projector/LM.
 std::vector<float> mel_buf;
 std::vector<float> enc_cat_host; // [T_enc, num_encoder_layers * enc_hidden]
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11 changes: 1 addition & 10 deletions
src/arch/granite_nar/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,16 +52,7 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, GraniteNarModel>);
static_assert(std::is_base_of_v<transcribe_session, GraniteNarSession>);

GraniteNarSession::~GraniteNarSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}
GraniteNarSession::~GraniteNarSession() = default;

GraniteNarModel::~GraniteNarModel() {
 if (bn_fused_ctx != nullptr) {
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4 changes: 1 addition & 3 deletions
src/arch/medasr/medasr.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -47,9 +47,6 @@ struct MedAsrModel final : public transcribe_model {
};

struct MedAsrSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 ggml_tensor * encoder_out = nullptr;

 std::vector<float> mel_buf;
Expand All@@ -58,6 +55,7 @@ struct MedAsrSession final : public transcribe_session {

 MedAsrSession() = default;
 ~MedAsrSession() override;
 void on_scratch_released() noexcept override;
};

} // namespace transcribe::medasr

13 changes: 4 additions & 9 deletions
src/arch/medasr/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -48,15 +48,10 @@ extern const Arch arch;
static_assert(std::is_base_of_v<transcribe_model, MedAsrModel>);
static_assert(std::is_base_of_v<transcribe_session, MedAsrSession>);

MedAsrSession::~MedAsrSession() {
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
MedAsrSession::~MedAsrSession() = default;

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void MedAsrSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

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8 changes: 0 additions & 8 deletions
src/arch/moonshine/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -44,14 +44,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineSession>);

MoonshineSession::~MoonshineSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineModel::~MoonshineModel() {
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3 changes: 0 additions & 3 deletions
src/arch/moonshine/moonshine.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -123,9 +123,6 @@ struct MoonshineModel final : public transcribe_model {
};

struct MoonshineSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the encoder output. Required because the
 // cross-KV graph runs in a fresh compute_ctx that does not share
 // tensor handles with the encoder graph.
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8 changes: 0 additions & 8 deletions
src/arch/moonshine_streaming/model.cpp

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Expand Up@@ -60,14 +60,6 @@ static_assert(std::is_base_of_v<transcribe_session, MoonshineStreamingSession>);

MoonshineStreamingSession::~MoonshineStreamingSession() {
 kv_cache.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MoonshineStreamingModel::~MoonshineStreamingModel() {
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3 changes: 0 additions & 3 deletions
src/arch/moonshine_streaming/moonshine_streaming.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -119,9 +119,6 @@ struct MoonshineStreamingModel final : public transcribe_model {
};

struct MoonshineStreamingSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 // Host-side mirror of the post-adapter encoder hidden. The adapter
 // pos_emb add (and proj when present) is applied once per session;
 // this host buffer feeds the cross_kv precompute graph.
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8 changes: 0 additions & 8 deletions
src/arch/moss/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -98,14 +98,6 @@ static_assert(std::is_base_of_v<transcribe_session, MossSession>);
MossSession::~MossSession() {
 kv_cache.free();
 kv_cache_batch.free();
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
}

MossModel::~MossModel() {
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3 changes: 0 additions & 3 deletions
src/arch/moss/moss.h

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Original file line numberDiff line numberDiff line change
Expand Up@@ -81,9 +81,6 @@ struct MossModel final : public transcribe_model {
};

struct MossSession final : public transcribe_session {
 ggml_context * compute_ctx = nullptr;
 ggml_backend_sched_t sched = nullptr;

 transcribe::causal_lm::KvCache kv_cache;

 // Batched KV cache for offline transcribe_run_batch (n_batch slabs).
Expand Down

17 changes: 5 additions & 12 deletions
src/arch/parakeet/model.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -56,18 +56,6 @@ static_assert(std::is_base_of_v<transcribe_model, ParakeetModel>);
static_assert(std::is_base_of_v<transcribe_session, ParakeetSession>);

ParakeetSession::~ParakeetSession() {
 // Tear down per-call compute state before the model's backend plan
 // (which outlives the context): scheduler, then context.
 if (sched != nullptr) {
 safe_sched_free(sched);
 sched = nullptr;
 }
 if (compute_ctx != nullptr) {
 ggml_free(compute_ctx);
 compute_ctx = nullptr;
 }
 encoder_out = nullptr;

 // Streaming cache tensors live in their own ggml_context + backend
 // buffer. Free buffer first (may hold a backend ref), then the ctx.
 if (stream_caches.buffer != nullptr) {
Expand DownExpand Up@@ -96,6 +84,11 @@ ParakeetSession::~ParakeetSession() {
 stream_caches.initialized = false;
}

// Base release_scratch has freed sched/compute_ctx; drop what pointed into them.
void ParakeetSession::on_scratch_released() noexcept {
 encoder_out = nullptr;
}

ParakeetModel::~ParakeetModel() {
 // Teardown order: ctx_meta → backend_buffer → plan backends. The
 // buffer must be freed before the backends (it holds a backend ref);
Expand Down
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