chrome/browser/stack_sampling_configuration.h

   1 // Copyright 2015 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_STACK_SAMPLING_CONFIGURATION_H_
   6 #define CHROME_BROWSER_STACK_SAMPLING_CONFIGURATION_H_
   7
   8 #include "base/profiler/stack_sampling_profiler.h"
   9
  10 // Chooses a configuration for the stack sampling profiler for browser process
  11 // startup. This must live outside of ChromeBrowserMainParts so it can be
  12 // friended by ChromeMetricsServiceAccessor.
  13 class StackSamplingConfiguration {
  14  public:
  15   StackSamplingConfiguration();
  16
  17   // Get the stack sampling params to use for this session.
  18   base::StackSamplingProfiler::SamplingParams GetSamplingParams() const;
  19
  20   // Returns true if the profiler should be started at all.
  21   bool IsProfilerEnabled() const;
  22
  23   // Register the chosen configuration as a synthetic field trial.
  24   void RegisterSyntheticFieldTrial() const;
  25
  26  private:
  27   enum ProfileConfiguration {
  28     PROFILE_DISABLED,
  29     PROFILE_NO_SAMPLES,  // Run the profiler thread, but don't collect profiles.
  30     PROFILE_5HZ,
  31     PROFILE_10HZ,
  32     PROFILE_100HZ,
  33     PROFILE_COUNT = PROFILE_100HZ
  34   };
  35
  36   const ProfileConfiguration configuration_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(StackSamplingConfiguration);
  39 };
  40
  41 #endif  // CHROME_BROWSER_STACK_SAMPLING_CONFIGURATION_H_