1827621 - Add a minium heap size threshold at which to use parallel marking

Status: RESOLVED FIXED

(Core :: JavaScript: GC, task, P3)

Description

[Jon Coppeard (:jonco)]

Benchmark results show that parallel marking is not a win for small heap sizes on all systems.

Comment 1

[Jon Coppeard (:jonco)]

Attachment: Bug 1827621 - Add a mininum heap size threashold at which to use parallel marking r?sfink

Benchmark results show that using parallel marking is not always a win for
small heaps, so add a threshold for its use.

This is set to 10MB, which will result in using parallel marking ~70% of the
time.

This parameter is set to zero for jit-tests and shell js tests so we get test
coverage where heap sizes are expected to be small (and maximum performance is
not a goal).

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/127346707e74
Add a mininum heap size threashold at which to use parallel marking r=sfink

Comment 3

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/127346707e74