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fix LPM extraction for composite keys - #272

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fix LPM extraction for composite keys#272
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@nicolaskagaminicolaskagami commented Aug 21, 2026•
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.

@nicolaskagaminicolaskagami self-assigned this Aug 21, 2026
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?

Comment threadtest/src/vrf_router.rs Outdated
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nicolaskagami commented Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?

This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.

@nicolaskagami

nicolaskagami commented Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?

Successfully ran voxel (rss, commtest) with this and the other two P4 changes.

@nicolaskagami
nicolaskagami merged commit 2ede7ca into mainAug 26, 2026
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fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
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fix LPM extraction for composite keys - #272
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fix LPM extraction for composite keys#272
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
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merged commit 2ede7ca
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fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
Skip to content
fix LPM extraction for composite keys - #272
Merged
nicolaskagami merged 2 commits into
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nsk/fix-lpm-extraction
Aug 26, 2026
Merged
fix LPM extraction for composite keys#272
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nsk/fix-lpm-extraction
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
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Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
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merged commit 2ede7ca
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fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
Skip to content
fix LPM extraction for composite keys - #272
Merged
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
Aug 26, 2026
Merged
fix LPM extraction for composite keys#272
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
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@nicolaskagaminicolaskagami
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
self-assigned this
Aug 21, 2026
rcgoodfellow
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
nicolaskagami
commented
Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
nicolaskagami
merged commit 2ede7ca
into
mainAug 26, 2026

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fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
Skip to content
fix LPM extraction for composite keys - #272
Merged
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
Aug 26, 2026
Merged
fix LPM extraction for composite keys#272
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
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@nicolaskagaminicolaskagami
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Aug 21, 2026•

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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
self-assigned this
Aug 21, 2026
rcgoodfellow
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
nicolaskagami
commented
Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
nicolaskagami
merged commit 2ede7ca
into
mainAug 26, 2026

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
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var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
Skip to content
fix LPM extraction for composite keys - #272
Merged
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
Aug 26, 2026
Merged
fix LPM extraction for composite keys#272
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
self-assigned this
Aug 21, 2026
rcgoodfellow
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
nicolaskagami
commented
Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
nicolaskagami
merged commit 2ede7ca
into
mainAug 26, 2026

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, 'i');
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var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
Skip to content
fix LPM extraction for composite keys - #272
Merged
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
Aug 26, 2026
Merged
fix LPM extraction for composite keys#272
nicolaskagami merged 2 commits into
mainfrom 
nsk/fix-lpm-extraction
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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
self-assigned this
Aug 21, 2026
rcgoodfellow
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
@nicolaskagami
nicolaskagami
commented
Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
@nicolaskagami
nicolaskagami
merged commit 2ede7ca
into
mainAug 26, 2026

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fix LPM extraction for composite keys by nicolaskagami · Pull Request #272 · oxidecomputer/p4 · GitHub
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fix LPM extraction for composite keys - #272
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nicolaskagami merged 2 commits into
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nsk/fix-lpm-extraction
Aug 26, 2026
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fix LPM extraction for composite keys#272
nicolaskagami merged 2 commits into
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nsk/fix-lpm-extraction
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@nicolaskagami
@nicolaskagaminicolaskagami
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Aug 21, 2026•

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  • LPM extraction now checks the size of the type instead of the size of the key, which was only correct if the key wasn't composite.
  • It now correctly considers the "length" byte when advancing the offset.
  • A test was added to exercise those two scenarios with a composite (lpm, exact) key.
@nicolaskagaminicolaskagami
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Aug 21, 2026
rcgoodfellow
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Aug 22, 2026
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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Comment threadtest/src/vrf_router.rs
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@nicolaskagami
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Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
This was a required change for my voxel runs for the 662 poc, though they were run in a heavily altered system. I'll do a clean run with just this and the other p4 fixes.
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Aug 25, 2026

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Mostly LGTM. Has this been tested in voxel, a4x2 or omicron-local?
Successfully ran voxel (rss, commtest) with this and the other two P4 changes.
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