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| author | sleffler@chromium.org <sleffler@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-05-01 20:56:43 +0000 |
|---|---|---|
| committer | sleffler@chromium.org <sleffler@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-05-01 20:56:43 +0000 |
| commit | 190f13f73accbebd0e715c9f09db2f1c42b582ca (patch) | |
| tree | 64cc444f1864f9a1cd1c81c6bb05940592883d88 /base/time_win.cc | |
| parent | 2883287341c88da630585e227dbd94c624258cf9 (diff) | |
| download | chromium_src-190f13f73accbebd0e715c9f09db2f1c42b582ca.zip chromium_src-190f13f73accbebd0e715c9f09db2f1c42b582ca.tar.gz chromium_src-190f13f73accbebd0e715c9f09db2f1c42b582ca.tar.bz2 | |
Add interface to system trace clock.
Add TimeTicks::NowFromSystemTraceTime to return the current system trace
event clock (falling back to TimeTicks::HighResNow when not supported).
On systems where the system trace clock is available this allows
system and chrome events to be stamped with a common clock (eliminating
post-processing time shift adjustment that can be hard).
BUG=chromium-os:27809
TEST=unit tests + collect trace data on chrome os w/ kernel that supports clock_gettime(CLOCK_SYSTEM_TRACE)
Change-Id: Ia6a500bd13a6f09c49052a1dd1421027960d8dea
Review URL: http://codereview.chromium.org/10257020
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134772 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'base/time_win.cc')
| -rw-r--r-- | base/time_win.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/base/time_win.cc b/base/time_win.cc index 9e6fe53..71c914d 100644 --- a/base/time_win.cc +++ b/base/time_win.cc @@ -1,4 +1,4 @@ -// Copyright (c) 2011 The Chromium Authors. All rights reserved. +// Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. @@ -436,6 +436,11 @@ TimeTicks TimeTicks::HighResNow() { } // static +TimeTicks TimeTicks::NowFromSystemTraceTime() { + return HighResNow(); +} + +// static int64 TimeTicks::GetQPCDriftMicroseconds() { return HighResNowSingleton::GetInstance()->GetQPCDriftMicroseconds(); } |