[heap] Introduce hard limit for external memory

[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
  the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
  AdjustAmountOfExternalMemory will trigger a marking step. The step size depends
  on how far we are away from the hard limit. Further away means we have still
  some wiggle room and the step will be small. Being closer to the hard limit
  makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829
Committed: https://crrev.com/ce66eec800e7329b0967b0f8eec7db05b2b22218
Cr-Commit-Position: refs/heads/master@{#39133}

[Michael Lippautz, 2016-09-01 08:30:02]

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

[Michael Lippautz, 2016-09-01 08:30:03]

ptal

[Michael Lippautz, 2016-09-01 15:08:52]

updated

[ulan, 2016-09-02 11:00:22]

lgtm

[Michael Lippautz, 2016-09-02 11:04:29]

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

[commit-bot: I haz the power, 2016-09-02 11:04:50]

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

[Michael Lippautz, 2016-09-02 11:07:32]

Description was changed from

==========
[heap] Introduce hard limit for external memory

Also start incremental marking earlier

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

to

==========
[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external
memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
AdjustAmountOfExternalMemory will trigger a marking step. The step size depends
on how far we are away from the hard limit. Further away means we have still
some wiggle room and the step will be small. Being closer to the hard limit
makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829
==========

[Michael Lippautz, 2016-09-02 11:07:52]

Description was changed from

==========
[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external
memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
AdjustAmountOfExternalMemory will trigger a marking step. The step size depends
on how far we are away from the hard limit. Further away means we have still
some wiggle room and the step will be small. Being closer to the hard limit
makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829
==========

to

==========
[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external
memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
  the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
  AdjustAmountOfExternalMemory will trigger a marking step. The step size
depends
  on how far we are away from the hard limit. Further away means we have still
  some wiggle room and the step will be small. Being closer to the hard limit
  makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829
==========

[commit-bot: I haz the power, 2016-09-02 11:08:51]

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

[commit-bot: I haz the power, 2016-09-02 11:08:52]

Dry run: Try jobs failed on following builders:
  v8_linux_gcc_compile_rel on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_gcc_compile_rel/bu...)
  v8_mac_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel_ng/builds/8113)

[Michael Lippautz, 2016-09-02 11:23:11]

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

[commit-bot: I haz the power, 2016-09-02 11:23:20]

Dry run: 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, 2016-09-02 11:29:53]

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

[commit-bot: I haz the power, 2016-09-02 11:29:54]

Dry run: Try jobs failed on following builders:
  v8_mac_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel_ng/builds/8117)

[Michael Lippautz, 2016-09-02 11:45:58]

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

[commit-bot: I haz the power, 2016-09-02 11:46:05]

Dry run: 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, 2016-09-02 12:09:49]

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

[commit-bot: I haz the power, 2016-09-02 12:09:50]

Dry run: This issue passed the CQ dry run.

[Michael Lippautz, 2016-09-02 12:10:26]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2016-09-02 12:10:27]

The patchset sent to the CQ was uploaded after l-g-t-m from ulan@chromium.org
Link to the patchset: https://codereview.chromium.org/2256853003/#ps140001
(title: "Fix compilation")

[commit-bot: I haz the power, 2016-09-02 12:10:38]

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, 2016-09-02 12:12:39]

Committed patchset #8 (id:140001)

[commit-bot: I haz the power, 2016-09-02 12:13:20]

Description was changed from

==========
[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external
memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
  the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
  AdjustAmountOfExternalMemory will trigger a marking step. The step size
depends
  on how far we are away from the hard limit. Further away means we have still
  some wiggle room and the step will be small. Being closer to the hard limit
  makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829
==========

to

==========
[heap] Introduce hard limit for external memory

We introduce, similar to regular heap, a hard and a soft limit for external
memory.
- Upon reaching the hard limit we do a full GC. The hard limit is a a delta from
  the size of external memory at last GC.
- Upon reaching the soft limit we start incremental marking. Each further
  AdjustAmountOfExternalMemory will trigger a marking step. The step size
depends
  on how far we are away from the hard limit. Further away means we have still
  some wiggle room and the step will be small. Being closer to the hard limit
  makes it more likely to trigger a full GC, so we increase the step size.

BUG=chromium:621829

Committed: https://crrev.com/ce66eec800e7329b0967b0f8eec7db05b2b22218
Cr-Commit-Position: refs/heads/master@{#39133}
==========

[commit-bot: I haz the power, 2016-09-02 12:13:21]

Patchset 8 (id:??) landed as
https://crrev.com/ce66eec800e7329b0967b0f8eec7db05b2b22218
Cr-Commit-Position: refs/heads/master@{#39133}