Disk cache perf test: guard linux only flushes, add fd limit control.

Disk cache perf test: guard linux only flushes, add fd limit control.

The system cache flush utilities can't flush directories except on
Linux, so don't try.

As well, it's only a convenience (since you can set the ulimit
yourself in shell before running the test), but it's nice if the test
just automatically gives itself an appropriate open file descriptor
test limit.

R=juliatuttle@chromium.org
BUG=611464
TEST=None

Committed: https://crrev.com/c77d596b47fc4ece347e94c53db0d4daa16d75fd
Cr-Commit-Position: refs/heads/master@{#393773}

[Julia Tuttle, 2016-05-13 16:28:17]

lgtm.

[gavinp, 2016-05-13 19:06:38]

The CQ bit was checked by gavinp@chromium.org

[commit-bot: I haz the power, 2016-05-13 19:07:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1978483004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1978483004/1

[commit-bot: I haz the power, 2016-05-13 20:33:30]

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

[commit-bot: I haz the power, 2016-05-13 20:33:31]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[gavinp, 2016-05-15 16:30:54]

The CQ bit was checked by gavinp@chromium.org

[gavinp, 2016-05-15 16:30:55]

The patchset sent to the CQ was uploaded after l-g-t-m from
juliatuttle@chromium.org
Link to the patchset: https://codereview.chromium.org/1978483004/#ps40001
(title: "more windows guards")

[commit-bot: I haz the power, 2016-05-15 16:31:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1978483004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1978483004/40001

[commit-bot: I haz the power, 2016-05-15 17:18:58]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-05-15 17:20:22]

Description was changed from

==========
Disk cache perf test: guard linux only flushes, add fd limit control.

The system cache flush utilities can't flush directories except on
Linux, so don't try.

As well, it's only a convenience (since you can set the ulimit
yourself in shell before running the test), but it's nice if the test
just automatically gives itself an appropriate open file descriptor
test limit.

R=juliatuttle@chromium.org
BUG=611464
TEST=None
==========

to

==========
Disk cache perf test: guard linux only flushes, add fd limit control.

The system cache flush utilities can't flush directories except on
Linux, so don't try.

As well, it's only a convenience (since you can set the ulimit
yourself in shell before running the test), but it's nice if the test
just automatically gives itself an appropriate open file descriptor
test limit.

R=juliatuttle@chromium.org
BUG=611464
TEST=None

Committed: https://crrev.com/c77d596b47fc4ece347e94c53db0d4daa16d75fd
Cr-Commit-Position: refs/heads/master@{#393773}
==========

[commit-bot: I haz the power, 2016-05-15 17:20:23]

Patchset 3 (id:??) landed as
https://crrev.com/c77d596b47fc4ece347e94c53db0d4daa16d75fd
Cr-Commit-Position: refs/heads/master@{#393773}