Add a trace-event for each runtime-stats timer

The trace-events will have a high overhead when turned on, but they are in a disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the behavior of V8 rather than its performance at the moment.

BUG=v8:5089
Committed: https://crrev.com/44ec143f26769bd103662643bfeafc7d0834cc90
Cr-Commit-Position: refs/heads/master@{#36909}

[fmeawad, 2016-06-09 21:14:19]

Description was changed from

==========
[Experiment] Add a trace-event per runtime-stats counter
==========

to

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.


BUG=v8:5089
==========

[fmeawad, 2016-06-11 21:44:29]

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

[commit-bot: I haz the power, 2016-06-11 21:44:32]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2052523002/80001

[fmeawad, 2016-06-11 21:58:53]

fmeawad@chromium.org changed reviewers:
+ cbruni@chromium.org

[fmeawad, 2016-06-11 21:58:54]

PTAL

[commit-bot: I haz the power, 2016-06-11 22:14:59]

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

[commit-bot: I haz the power, 2016-06-11 22:15:00]

Dry run: This issue passed the CQ dry run.

[Camillo Bruni, 2016-06-12 12:33:35]

LGTM with comments.

BTW, we still have all the tracing events disabled for runtime functions if I
remember correctly.

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h
File src/api-arguments-inl.h (right):

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h...
src/api-arguments-inl.h:23: TRACE_RUNTIME_CALL("Function");                     
                     \
Function is a macro parameter here => #Function

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h...
src/api-arguments-inl.h:48: TRACE_RUNTIME_CALL("Function");                     
                  \
same here.

[fmeawad, 2016-06-12 15:52:23]

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h
File src/api-arguments-inl.h (right):

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h...
src/api-arguments-inl.h:23: TRACE_RUNTIME_CALL("Function");                     
                     \
On 2016/06/12 12:33:35, Camillo Bruni wrote:
> Function is a macro parameter here => #Function

Done.

https://codereview.chromium.org/2052523002/diff/80001/src/api-arguments-inl.h...
src/api-arguments-inl.h:48: TRACE_RUNTIME_CALL("Function");                     
                  \
On 2016/06/12 12:33:35, Camillo Bruni wrote:
> same here.

Done.

[fmeawad, 2016-06-12 15:53:04]

The CQ bit was checked by fmeawad@chromium.org

[fmeawad, 2016-06-12 15:53:04]

The patchset sent to the CQ was uploaded after l-g-t-m from cbruni@chromium.org
Link to the patchset: https://codereview.chromium.org/2052523002/#ps100001
(title: ""Function" --> #Function")

[commit-bot: I haz the power, 2016-06-12 15:53:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2052523002/100001

[commit-bot: I haz the power, 2016-06-12 16:20:26]

Description was changed from

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.


BUG=v8:5089
==========

to

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.


BUG=v8:5089
==========

[commit-bot: I haz the power, 2016-06-12 16:20:27]

Committed patchset #6 (id:100001)

[commit-bot: I haz the power, 2016-06-12 16:21:26]

Description was changed from

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.


BUG=v8:5089
==========

to

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.

BUG=v8:5089

Committed: https://crrev.com/44ec143f26769bd103662643bfeafc7d0834cc90
Cr-Commit-Position: refs/heads/master@{#36909}
==========

[commit-bot: I haz the power, 2016-06-12 16:21:27]

Patchset 6 (id:??) landed as
https://crrev.com/44ec143f26769bd103662643bfeafc7d0834cc90
Cr-Commit-Position: refs/heads/master@{#36909}

[Benedikt Meurer, 2016-06-13 04:19:33]

A revert of this CL (patchset #6 id:100001) has been created in
https://codereview.chromium.org/2064553002/ by bmeurer@chromium.org.

The reason for reverting is: Seems to break TSAN, see
http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/10057.

[lpy, 2016-07-22 23:10:08]

Description was changed from

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.

BUG=v8:5089

Committed: https://crrev.com/44ec143f26769bd103662643bfeafc7d0834cc90
Cr-Commit-Position: refs/heads/master@{#36909}
==========

to

==========
The trace-events will have a high overhead when turned on, but they are in a
disabled-by-default category.

As long as the off overhead is negligible, this CL allows us to understand the
behavior of V8 rather than its performance at the moment.

BUG=v8:5089

Committed: https://crrev.com/44ec143f26769bd103662643bfeafc7d0834cc90
Cr-Commit-Position: refs/heads/master@{#36909}
==========