[heap] Simplify distribution of remaining memory during sweeping & compaction

[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N

Committed: https://crrev.com/f72923526ccaa8faef5c977267b0c074c4a44dfa
Cr-Commit-Position: refs/heads/master@{#33668}

[Michael Lippautz, 2016-02-01 19:45:11]

Patchset #1 (id:1) has been deleted

[Michael Lippautz, 2016-02-01 19:47:32]

Description was changed from

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=
==========

to

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N
==========

[Michael Lippautz, 2016-02-01 20:06:49]

Patchset #2 (id:40001) has been deleted

[Michael Lippautz, 2016-02-01 20:06:54]

Patchset #1 (id:20001) has been deleted

[Michael Lippautz, 2016-02-01 20:12:40]

mlippautz@chromium.org changed reviewers:
+ hpayer@chromium.org

[Michael Lippautz, 2016-02-01 20:12:40]

PTAL.

Just came across my own (dead) code while profiling... 

Dividing memory at this point is not supposed to work because we destroy all
free lists in PagedSpace::PrepareForMarkCompact() and rebuild them using the
sweeper. At some point this could've worked if we push from the sweeper into the
paged spaces but we've been using a pull-based approach for a long time now.

(Refilling from the sweeper, i.e., during SlowAllocateRaw->RefillFreeList works
as expected.)

[Michael Lippautz, 2016-02-01 20:13:30]

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

[commit-bot: I haz the power, 2016-02-01 20:13:43]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653973003/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653973003/60001

[commit-bot: I haz the power, 2016-02-01 20:17:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-02-01 20:17:33]

Dry run: Try jobs failed on following builders:
  v8_linux_mips64el_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_mips64el_compile_r...)
  v8_linux_mipsel_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_mipsel_compile_rel...)

[Michael Lippautz, 2016-02-02 08:16:44]

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

[commit-bot: I haz the power, 2016-02-02 08:17:06]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653973003/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653973003/80001

[commit-bot: I haz the power, 2016-02-02 08:41:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-02-02 08:41:55]

Dry run: This issue passed the CQ dry run.

[Hannes Payer (out of office), 2016-02-02 09:17:36]

On 2016/02/02 08:41:55, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

Lgtm

[Michael Lippautz, 2016-02-02 10:36:06]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2016-02-02 10:36:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653973003/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653973003/80001

[commit-bot: I haz the power, 2016-02-02 10:38:58]

Description was changed from

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N
==========

to

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N
==========

[commit-bot: I haz the power, 2016-02-02 10:38:58]

Committed patchset #2 (id:80001)

[commit-bot: I haz the power, 2016-02-02 10:39:27]

Description was changed from

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N
==========

to

==========
[heap] Simplify distribution of remaining memory during sweeping & compaction

BUG=chromium:524425
LOG=N

Committed: https://crrev.com/f72923526ccaa8faef5c977267b0c074c4a44dfa
Cr-Commit-Position: refs/heads/master@{#33668}
==========

[commit-bot: I haz the power, 2016-02-02 10:39:27]

Patchset 2 (id:??) landed as
https://crrev.com/f72923526ccaa8faef5c977267b0c074c4a44dfa
Cr-Commit-Position: refs/heads/master@{#33668}

[Michael Hablich, 2016-02-03 08:49:13]

A revert of this CL (patchset #2 id:80001) has been created in
https://codereview.chromium.org/1661723003/ by hablich@chromium.org.

The reason for reverting is: Very likely blocking roll:
https://codereview.chromium.org/1652413003/.