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MXFP8 support in Userbuffers - #1711

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ptrendx merged 55 commits into
NVIDIA:mainfrom
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged

MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom
timmoon10:mxfp8-ub-debug

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@timmoon10timmoon10 commented Apr 22, 2025•
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Description

This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:

  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.

In the process, I've done some significant refactoring:

  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity

Type of change

  • Documentation change (change only to the documentation, either a fix or a new content)
  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • Infra/Build change
  • Code refactoring

Changes

  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential

Checklist:

  • I have read and followed the contributing guidelines
  • The functionality is complete
  • I have commented my code, particularly in hard-to-understand areas
  • I have made corresponding changes to the documentation
  • My changes generate no new warnings
  • I have added tests that prove my fix is effective or that my feature works
  • New and existing unit tests pass locally with my changes

@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10 added the enhancement New feature or request label Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10

timmoon10 commented Apr 28, 2025

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/te-ci pytorch L1

denera
denera previously approved these changes Apr 29, 2025
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LGTM

@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10

timmoon10 commented May 1, 2025

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/te-ci L1

@timmoon10

timmoon10 commented May 2, 2025

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/te-ci pytorch L1

ptrendx
ptrendx reviewed May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py Outdated
timmoon10and others added 5 commits May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10

timmoon10 commented May 7, 2025

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/te-ci pytorch L1

@timmoon10
Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10

timmoon10 commented May 7, 2025

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/te-ci pytorch L1

timmoon10and others added 2 commits May 7, 2025 07:35
@timmoon10

timmoon10 commented May 7, 2025

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/te-ci pytorch L1

ptrendx
ptrendx approved these changes May 7, 2025
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LGTM

@ptrendx
ptrendx merged commit ce0b46c into NVIDIA:mainMay 7, 2025
@timmoon10timmoon10 mentioned this pull request Jun 11, 2025
Merged
13 tasks
@timmoon10timmoon10 mentioned this pull request Jul 15, 2025
Merged
13 tasks
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@ptrendxptrendxptrendx approved these changes
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@ksivamanksivamanAwaiting requested review from ksivamanksivaman is a code owner

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@timmoon10@zhongbozhu@denera@ptrendx
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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
@timmoon10timmoon10
commented
Apr 22, 2025•

edited

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
Apr 28, 2025

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/te-ci pytorch L1
denera
denera
previously approved these changes
Apr 29, 2025
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 1, 2025

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/te-ci L1
@timmoon10
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commented
May 2, 2025

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/te-ci pytorch L1
ptrendx
ptrendx
reviewed
May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
Outdated

timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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/te-ci pytorch L1
@timmoon10
Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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/te-ci pytorch L1
timmoon10and others
added 2 commits
May 7, 2025 07:35
@timmoon10
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May 7, 2025

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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

13 tasks
@timmoon10timmoon10
mentioned this pull request
Jul 15, 2025
 Merged

13 tasks
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@ptrendxptrendxptrendx approved these changes
@deneradeneradenera left review comments
@ksivamanksivamanAwaiting requested review from ksivamanksivaman is a code owner

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@timmoon10@zhongbozhu@denera@ptrendx

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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
@timmoon10timmoon10
commented
Apr 22, 2025•

edited

Loading

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
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Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
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Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
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May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
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@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
@timmoon10timmoon10
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Apr 22, 2025•

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
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Apr 28, 2025

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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 1, 2025

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/te-ci L1
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/te-ci pytorch L1
ptrendx
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May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
Outdated

timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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/te-ci pytorch L1
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Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
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May 7, 2025

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May 7, 2025 07:35
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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

13 tasks
@timmoon10timmoon10
mentioned this pull request
Jul 15, 2025
 Merged

13 tasks
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@timmoon10@zhongbozhu@denera@ptrendx

, 'i');
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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
@timmoon10timmoon10
commented
Apr 22, 2025•

edited

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
Apr 28, 2025

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/te-ci pytorch L1
denera
denera
previously approved these changes
Apr 29, 2025
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 1, 2025

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/te-ci L1
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May 2, 2025

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/te-ci pytorch L1
ptrendx
ptrendx
reviewed
May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
Outdated

timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

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@timmoon10timmoon10
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Jul 15, 2025
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
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Apr 22, 2025•

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
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May 1, 2025

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/te-ci L1
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ptrendx
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May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
Outdated

timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
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May 7, 2025

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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

13 tasks
@timmoon10timmoon10
mentioned this pull request
Jul 15, 2025
 Merged

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@timmoon10@zhongbozhu@denera@ptrendx

, 'i');
if (__m === '*' || __re.test(location.href)) {
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
Skip to content
MXFP8 support in Userbuffers - #1711
Merged
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
Conversation
@timmoon10
@timmoon10timmoon10
commented
Apr 22, 2025•

edited

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
Apr 28, 2025

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denera
denera
previously approved these changes
Apr 29, 2025
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 1, 2025

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/te-ci L1
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May 2, 2025

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/te-ci pytorch L1
ptrendx
ptrendx
reviewed
May 6, 2025
View reviewed changes
Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
Outdated

timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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@timmoon10
Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
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May 7, 2025

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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

13 tasks
@timmoon10timmoon10
mentioned this pull request
Jul 15, 2025
 Merged

13 tasks
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, 'i');
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MXFP8 support in Userbuffers by timmoon10 · Pull Request #1711 · NVIDIA/TransformerEngine · GitHub
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MXFP8 support in Userbuffers - #1711
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ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
May 7, 2025
Merged
MXFP8 support in Userbuffers#1711
ptrendx merged 55 commits into
NVIDIA:mainfrom 
timmoon10:mxfp8-ub-debug
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Apr 22, 2025•

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Description
This PR adds basic support for overlapped tensor-parallel communication with MXFP8 data, with the following limitations:
  • Tensor dimensions must be multiples of 128
  • MXFP8 scaling factors are communicated with blocking NCCL collectives
  • The wgrad GEMM + grad output AG case is not supported.
In the process, I've done some significant refactoring:
  • Removed quantized tensor logic from the Userbuffers communicators, so they only take responsibility for the Userbuffers buffer itself.
  • Added helper functions to expose the Userbuffers buffer as a quantized tensor and handle scaling factors
  • Restore support for Userbuffers in te.Sequential
  • Reorganize module implementation for clarity
Type of change
  •  Documentation change (change only to the documentation, either a fix or a new content)
  •  Bug fix (non-breaking change which fixes an issue)
  •  New feature (non-breaking change which adds functionality)
  •  Breaking change (fix or feature that would cause existing functionality to not work as expected)
  •  Infra/Build change
  •  Code refactoring
Changes
  • Add MXFP8 support in Userbuffers
  • Move Userbuffers logic for quantized tensors out of UB communicator and into helper functions
  • Restore Userbuffers support in te.Sequential
Checklist:
  •  I have read and followed the contributing guidelines
  •  The functionality is complete
  •  I have commented my code, particularly in hard-to-understand areas
  •  I have made corresponding changes to the documentation
  •  My changes generate no new warnings
  •  I have added tests that prove my fix is effective or that my feature works
  •  New and existing unit tests pass locally with my changes
@timmoon10
Initial work toward restoring UB support in te.Sequential
25bcbda
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Forward UB linear runs, but has numerical error
49c6a02
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB forward tests
4bacf2a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Minor tweaks
bd1d50a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Remove Python checks for MXFP8 UB linear forward
b8b325b
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add dim check for MXFP8 full tiles
c8b2c51
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Move QuantizedTensor logic out of UB comm and into Python helper func…
9f562b6
…tion
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Support MXFP8 AGs
c7a5e65
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Coalesce NCCL all-gathers for MXFP8 all-gather
0c1a98f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
4304ddf
@timmoon10
Merge branch 'main' into optimize-wgrad-allgather
15c34ec
@timmoon10
Initial impl of backward UB linear in te.Sequential
0917b20
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'optimize-wgrad-allgather' into mxfp8-ub-debug
33a3dbb
@timmoon10
Debug UB linear backward with no quantization
a86cbb9
dgrad GEMM + dx RS is still broken.
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix chunk dims for dgrad GEMM + dx RS
3ff2955
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debugging MXFP8 UB cases
0942ee3
Still failing with dy AG + wgrad GEMM
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Use NCCL to overlap dy AG with dgrad GEMM
df59ba0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
1047a09
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug UB GEMM tests
ffa65bf
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Initial refactoring of linear module forward
8531147
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10timmoon10
added
the 
enhancement
New feature or request
label
Apr 22, 2025
@timmoon10
Refactor linear module backward
0767cea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Debug linear module UB tests
1a03c8f
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Tweak test tensor dims
0639166
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
6f855aa
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Do not store autograd context within wgrad GEMM closure
d4ac2ea
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix linter warnings
7803cb0
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
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Apr 28, 2025

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/te-ci pytorch L1
denera
denera
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Apr 29, 2025
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LGTM
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
dfb53ca
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Fix RS out dims
546e02a
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
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May 1, 2025

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/te-ci L1
@timmoon10
timmoon10
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May 2, 2025

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/te-ci pytorch L1
ptrendx
ptrendx
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May 6, 2025
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Comment threadtests/pytorch/distributed/run_gemm_with_overlap.py
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timmoon10and others
added 5 commits
May 6, 2025 21:54
@timmoon10
Merge branch 'main' into mxfp8-ub-debug
fe02a7e
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Restore support for internal quantized tensors
19459ec
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
Add tests for MXFP8 GEMM with UB
0efa1a9
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@pre-commit-ci
[pre-commit.ci] auto fixes from pre-commit.com hooks
fb5ca6e
for more information, see https://pre-commit.ci
@timmoon10
Fix linter warnings
70057c6
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
timmoon10
commented
May 7, 2025

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/te-ci pytorch L1
@timmoon10
Debug test failures
7153804
Signed-off-by: Tim Moon <tmoon@nvidia.com>
@timmoon10
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May 7, 2025

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/te-ci pytorch L1
timmoon10and others
added 2 commits
May 7, 2025 07:35
@timmoon10
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May 7, 2025

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/te-ci pytorch L1
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LGTM
@ptrendx
ptrendx
merged commit ce0b46c
into
NVIDIA:mainMay 7, 2025
@timmoon10timmoon10
mentioned this pull request
Jun 11, 2025
 Merged

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@timmoon10timmoon10
mentioned this pull request
Jul 15, 2025
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@timmoon10@zhongbozhu@denera@ptrendx