[ignition] Tune code size multiplier.

[ignition] Tune code size multiplier.

The interpreter is currently too aggressive in tiering up to TurboFan,
especially for (expensive) OSR. Make it slightly less aggressive by
choosing a more realistic code size multiplier.

R=jarin@chromium.org

Committed: https://crrev.com/763dd402b62265aa419cab9ee7e65cd4762a293b
Cr-Commit-Position: refs/heads/master@{#40550}

[Benedikt Meurer, 2016-10-25 07:45:47]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-25 07:45:49]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jarin, 2016-10-25 07:51:43]

lgtm

[Benedikt Meurer, 2016-10-25 08:05:40]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-10-25 08:05:47]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-10-25 08:05:51]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-25 08:12:18]

Committed patchset #1 (id:1)

[rmcilroy, 2016-10-25 08:16:29]

rmcilroy@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[rmcilroy, 2016-10-25 08:16:30]

This is so something which should be reviewed by the interpreter team. 32 was
originally chosen because it was a close approximation of the difference between
FCG size and bytecode. We know there needs to be some tuning here but I'd like
to understand why you chose 72 here before making this change.

Regarding OSR, Mythri was also looking I to this and making changes to the
runtime profiler which had good performance improvements. Could you work with
her to figure out which approach gives the best overall improvement please.

[commit-bot: I haz the power, 2016-11-17 22:11:59]

Description was changed from

==========
[ignition] Tune code size multiplier.

The interpreter is currently too aggressive in tiering up to TurboFan,
especially for (expensive) OSR. Make it slightly less aggressive by
choosing a more realistic code size multiplier.

R=jarin@chromium.org
==========

to

==========
[ignition] Tune code size multiplier.

The interpreter is currently too aggressive in tiering up to TurboFan,
especially for (expensive) OSR. Make it slightly less aggressive by
choosing a more realistic code size multiplier.

R=jarin@chromium.org

Committed: https://crrev.com/763dd402b62265aa419cab9ee7e65cd4762a293b
Cr-Commit-Position: refs/heads/master@{#40550}
==========

[commit-bot: I haz the power, 2016-11-17 22:12:00]

Patchset 1 (id:??) landed as
https://crrev.com/763dd402b62265aa419cab9ee7e65cd4762a293b
Cr-Commit-Position: refs/heads/master@{#40550}