chrome/browser/metrics/time_ticks_experiment_win.h - Issue 13583007: Create a field trial to test if we can detect good QPC implementations.

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Side by Side Diff: chrome/browser/metrics/time_ticks_experiment_win.h

Issue 13583007: Create a field trial to test if we can detect good QPC implementations. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Restore affinity at the end Created 7 years, 8 months ago

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	1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.

	2 // Use of this source code is governed by a BSD-style license that can be

	3 // found in the LICENSE file.

	4

	5 #ifndef CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_

	6 #define CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_

	7

	8 #include "build/build_config.h"

	9

	10 #if defined(OS_WIN)

	11

	12 namespace chrome_browser_metrics {
	darin (slow to review) 2013/04/22 18:25:05 I'm not a fan of this style of namespace. I think I'm not a fan of this style of namespace. I think we should either use no namespace or just a chrome:: namespace corresponding to the top-level directory. There was some discussion about this back in 2010: https://groups.google.com/a/chromium.org/forum/?fromgroups=#!topic/chromium-d... More recently, I've grown increasingly convinced that the approach taken by src/content and src/net is best. That is, just have a namespace corresponding to the top-level directory, and then prefix your classes for name-grouping below that. Avoid nested namespaces. It looks like just the tracking_synchronization* files make use of this namespace currently.
	13

	14 // Runs an experiment once per session upon successful upload of UMA. Determines

	15 // if QueryPerformanceCounter() is safe to use generally on this system. Ensures

	16 // that the resolution is better than 1ms, returns quickly, and is monotonically

	17 // increasing. Records the results in UMA for the next upload.

	18 void CollectTimeTicksStats();

	19

	20 } // namespace chrome_browser_metrics

	21

	22 #endif // defined(OS_WIN)

	23

	24 #endif // CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_

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