Closed
Bug 1618638
Opened 4 years ago
Closed 4 years ago
Parallelise unmarking GC things at the start of GC
Categories
(Core :: JavaScript: GC, task, P3)
Core
JavaScript: GC
Tracking
()
RESOLVED
FIXED
mozilla75
| Tracking | Status | |
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| firefox75 | --- | fixed |
People
(Reporter: jonco, Assigned: jonco)
References
Details
Attachments
(2 files)
Clearing mark bits can be easily parallelised and this should help reduce the pause times in the initial GC slice. This shows up in GC_SLOW_TASK telemetry as the second most frequent culprit (behind buffering gray roots).
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Assignee | |
Comment 1•4 years ago
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Depends on D64639
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Assignee | |
Comment 2•4 years ago
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This adds an iterator ArenasToUnmark and uses AutoRunParallelWork to distribute the work. I didn't go the whole way and make an iterator combinator but I could do this (and it might make this easier to understand).
Depends on D64640
Pushed by jcoppeard@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/eac472face04 Split off weak map unmarking from arena unmarking r=sfink https://hg.mozilla.org/integration/autoland/rev/854e8aba90c1 Parallelise clearing marking bits at the start of GC r=sfink
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Comment 4•4 years ago
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| bugherder | ||
https://hg.mozilla.org/mozilla-central/rev/eac472face04
https://hg.mozilla.org/mozilla-central/rev/854e8aba90c1
Status: NEW → RESOLVED
Closed: 4 years ago
status-firefox75:
--- → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla75
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Description
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