[heap] Add notes for preempting/finishing jobs [v8/v8 : main]

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Omer Katz (Gerrit)

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Dec 15, 2025, 9:26:33 AM (23 hours ago) Dec 15
to Michael Lippautz, V8 LUCI CQ, AyeAye, Hannes Payer, mlippau...@chromium.org, oilpan-r...@chromium.org, v8-re...@googlegroups.com
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Patchset-level comments
File-level comment, Patchset 1 (Latest):
Omer Katz . resolved

ptal.
These notes were useful last week when looking into crbug.com/465491617.

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Michael Lippautz (Gerrit)

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Dec 15, 2025, 10:04:49 AM (23 hours ago) Dec 15
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Code-Review+1

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Michael Lippautz . resolved

lgtm

File src/heap/array-buffer-sweeper.cc
Line 458, Patchset 1 (Latest): TRACE_GC_NOTE("ArrayBufferSweeper Finished");
Michael Lippautz . unresolved

How are the notes visible in a trace?

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Omer Katz (Gerrit)

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Dec 15, 2025, 11:22:35 AM (21 hours ago) Dec 15
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File src/heap/array-buffer-sweeper.cc
Line 458, Patchset 1 (Latest): TRACE_GC_NOTE("ArrayBufferSweeper Finished");
Michael Lippautz . resolved

How are the notes visible in a trace?

Omer Katz

answered offline.

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    V8 LUCI CQ (Gerrit)

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    Dec 15, 2025, 11:24:06 AM (21 hours ago) Dec 15
    to Omer Katz, Michael Lippautz, AyeAye, Hannes Payer, mlippau...@chromium.org, oilpan-r...@chromium.org, v8-re...@googlegroups.com

    V8 LUCI CQ submitted the change

    Change information

    Commit message:
    [heap] Add notes for preempting/finishing jobs

    Help distinguish on a trace which concurrent jobs end because of
    preemption and which end because they run out of work.
    Notes are added only to jobs that can yield.
    Bug: 42204085
    Change-Id: If3064174cc6ccfda50230b906589f456983e46a9
    Reviewed-by: Michael Lippautz <mlip...@chromium.org>
    Commit-Queue: Omer Katz <omer...@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#104328}
    Files:
    • M src/heap/array-buffer-sweeper.cc
    • M src/heap/concurrent-marking.cc
    • M src/heap/cppgc/concurrent-marker.cc
    • M src/heap/cppgc/stats-collector.h
    • M src/heap/cppgc/sweeper.cc
    • M src/heap/scavenger.cc
    • M src/heap/sweeper.cc
    • M src/heap/sweeper.h
    Change size: S
    Delta: 8 files changed, 34 insertions(+), 3 deletions(-)
    Branch: refs/heads/main
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    Gerrit-Change-Number: 7261997
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