content/browser/power_profiler/power_event.h

   1 // Copyright 2014 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 CONTENT_BROWSER_POWER_PROFILER_POWER_EVENT_H_
   6 #define CONTENT_BROWSER_POWER_PROFILER_POWER_EVENT_H_
   7
   8 #include "base/time/time.h"
   9
  10 namespace content {
  11
  12 struct PowerEvent {
  13   enum Type {
  14     // Total power of SoC. including CPU, GT and others on the chip,
  15     // modules which aren't part of the SoC such as the screen are not included.
  16     SOC_PACKAGE,
  17
  18     // Whole device power.
  19     DEVICE,
  20
  21     // Keep this at the end.
  22     ID_COUNT
  23   };
  24
  25   Type type;
  26
  27   base::TimeTicks time;  // Time that power data was read.
  28
  29   // Power value between last event and this one, in watts.
  30   // E.g, event1 {t1, v1}; event2 {t2, v2}; event3 {t3, v3}.
  31   // Suppose event1 is the first event the observer received, then event2,
  32   // event3. Then v2 is the average power from t1 to t2, v3 is the average
  33   // power from t2 to t3. v1 should be ignored since event1 only means the
  34   // start point of power profiling.
  35   double value;
  36 };
  37
  38 extern const char* kPowerTypeNames[];
  39
  40 }  // namespace content
  41
  42 #endif  // CONTENT_BROWSER_POWER_PROFILER_POWER_EVENT_H_