Index: chrome/browser/chromeos/power/cpu_data_collector.h |
diff --git a/chrome/browser/chromeos/power/cpu_data_collector.h b/chrome/browser/chromeos/power/cpu_data_collector.h |
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-// Copyright 2014 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. |
- |
-#ifndef CHROME_BROWSER_CHROMEOS_POWER_CPU_DATA_COLLECTOR_H_ |
-#define CHROME_BROWSER_CHROMEOS_POWER_CPU_DATA_COLLECTOR_H_ |
- |
-#include <deque> |
-#include <map> |
-#include <string> |
-#include <vector> |
- |
-#include "base/basictypes.h" |
-#include "base/memory/weak_ptr.h" |
-#include "base/time/time.h" |
-#include "base/timer/timer.h" |
- |
-namespace chromeos { |
- |
-// A class to sample CPU idle state occupancy and freq state occupancy. |
-// Collects raw data from sysfs and does not convert it to percentage |
-// occupancy. As CPUs can be offline at times, or the system can be suspended at |
-// other times, it is best for the consumer of this data to calculate percentage |
-// occupancy information using suspend time data from |
-// PowerDataCollector::system_resumed_data. |
-class CpuDataCollector { |
- public: |
- struct StateOccupancySample { |
- StateOccupancySample(); |
- ~StateOccupancySample(); |
- |
- // The time when the data was sampled. |
- base::Time time; |
- |
- // Indicates whether the CPU is online. |
- bool cpu_online; |
- |
- // A mapping from a CPU state to time spent in that state in milliseconds. |
- // For idle state samples, the name of the state at index i in this vector |
- // is the name at index i in the vector returned by cpu_idle_state_names(). |
- // Similarly, for freq state occupancy, similar information is in the vector |
- // returned by cpu_freq_state_names(). |
- std::vector<int64> time_in_state; |
- }; |
- |
- typedef std::deque<StateOccupancySample> StateOccupancySampleDeque; |
- |
- const std::vector<std::string>& cpu_idle_state_names() const { |
- return cpu_idle_state_names_; |
- } |
- |
- const std::vector<StateOccupancySampleDeque>& cpu_idle_state_data() const { |
- return cpu_idle_state_data_; |
- } |
- |
- const std::vector<std::string>& cpu_freq_state_names() const { |
- return cpu_freq_state_names_; |
- } |
- |
- const std::vector<StateOccupancySampleDeque>& cpu_freq_state_data() const { |
- return cpu_freq_state_data_; |
- } |
- |
- CpuDataCollector(); |
- ~CpuDataCollector(); |
- |
- // Starts a repeating timer which periodically runs a callback to collect |
- // CPU state occupancy samples. |
- void Start(); |
- |
- private: |
- // Posts callbacks to the blocking pool which collect CPU state occupancy |
- // samples from the sysfs. |
- void PostSampleCpuState(); |
- |
- // Samples CPU idle and CPU freq data from sysfs. This function should run on |
- // the blocking pool as reading from sysfs is a blocking task. Elements at |
- // index i in |idle_samples| and |freq_samples| correspond to the idle and |
- // freq samples of CPU i. |
- void SampleCpuStateOnBlockingPool( |
- std::vector<std::string>* cpu_idle_state_names, |
- std::vector<StateOccupancySample>* idle_samples, |
- std::vector<std::string>* cpu_freq_state_names, |
- std::vector<StateOccupancySample>* freq_samples); |
- |
- // This function commits the samples read by SampleCpuStateOnBlockingPool to |
- // |cpu_idle_state_data_| and |cpu_freq_state_data_|. Since UI is the consumer |
- // of CPU idle and freq data, this function should run on the UI thread. |
- void SaveCpuStateSamplesOnUIThread( |
- const std::vector<std::string>* cpu_idle_state_names, |
- const std::vector<StateOccupancySample>* idle_samples, |
- const std::vector<std::string>* cpu_freq_state_names, |
- const std::vector<StateOccupancySample>* freq_samples); |
- |
- base::RepeatingTimer<CpuDataCollector> timer_; |
- |
- // Names of the idle states. |
- std::vector<std::string> cpu_idle_state_names_; |
- |
- // The deque at index <i> in the vector corresponds to the idle state |
- // occupancy data of CPU<i>. |
- std::vector<StateOccupancySampleDeque> cpu_idle_state_data_; |
- |
- // Names of the freq states. |
- std::vector<std::string> cpu_freq_state_names_; |
- |
- // The deque at index <i> in the vector corresponds to the frequency state |
- // occupancy data of CPU<i>. |
- std::vector<StateOccupancySampleDeque> cpu_freq_state_data_; |
- |
- // The number of CPUs on the system. This value is read from the sysfs, and |
- // hence should be read/written to only from the blocking pool. |
- int cpu_count_; |
- |
- base::WeakPtrFactory<CpuDataCollector> weak_ptr_factory_; |
- DISALLOW_COPY_AND_ASSIGN(CpuDataCollector); |
-}; |
- |
-} // namespace chromeos |
- |
-#endif // CHROME_BROWSER_CHROMEOS_POWER_CPU_DATA_COLLECTOR_H_ |