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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_POWER_PROCESS_POWER_COLLECTOR_H_
#define CHROME_BROWSER_POWER_PROCESS_POWER_COLLECTOR_H_
#include <map>
#include "base/memory/linked_ptr.h"
#include "base/process/process_handle.h"
#include "base/process/process_metrics.h"
#include "base/timer/timer.h"
#include "components/power/origin_power_map_factory.h"
#include "url/gurl.h"
#if defined(OS_CHROMEOS)
#include "chromeos/dbus/power_manager_client.h"
#endif
class Profile;
namespace content {
class RenderProcessHost;
}
#if defined(OS_CHROMEOS)
namespace power_manager {
class PowerSupplyProperties;
}
#endif
// Manages regular updates of the profile power consumption.
class ProcessPowerCollector
#if defined(OS_CHROMEOS)
: public chromeos::PowerManagerClient::Observer
#endif
{
public:
class PerProcessData {
public:
PerProcessData(scoped_ptr<base::ProcessMetrics> metrics,
const GURL& origin,
Profile* profile);
PerProcessData();
~PerProcessData();
base::ProcessMetrics* metrics() const { return metrics_.get(); }
Profile* profile() const { return profile_; }
GURL last_origin() const { return last_origin_; }
int last_cpu_percent() const { return last_cpu_percent_; }
bool seen_this_cycle() const { return seen_this_cycle_; }
void set_last_cpu_percent(double new_cpu) { last_cpu_percent_ = new_cpu; }
void set_seen_this_cycle(bool seen) { seen_this_cycle_ = seen; }
private:
// |metrics_| holds the ProcessMetrics information for the given process.
scoped_ptr<base::ProcessMetrics> metrics_;
// |profile| is the profile that is visiting the |last_origin_|.
// It is not owned by PerProcessData.
Profile* profile_;
// |last_origin_| is the last origin visited by the process.
GURL last_origin_;
// |last_cpu_percent_| is the proportion of the CPU used since the last
// query.
double last_cpu_percent_;
// |seen_this_cycle| represents if the process still exists in this cycle.
// If it doesn't, we erase the PerProcessData.
bool seen_this_cycle_;
DISALLOW_COPY_AND_ASSIGN(PerProcessData);
};
// A map from all process handles to a metric.
typedef std::map<base::ProcessHandle, linked_ptr<PerProcessData> >
ProcessMetricsMap;
// A callback used to define mock CPU usage for testing.
typedef base::Callback<double(base::ProcessHandle)> CpuUsageCallback;
// On Chrome OS, can only be initialized after the DBusThreadManager has been
// initialized.
ProcessPowerCollector();
#if defined(OS_CHROMEOS)
// On Chrome OS, can only be destroyed before DBusThreadManager is.
~ProcessPowerCollector() override;
#else
virtual ~ProcessPowerCollector();
#endif
void set_cpu_usage_callback_for_testing(const CpuUsageCallback& callback) {
cpu_usage_callback_ = callback;
}
ProcessMetricsMap* metrics_map_for_testing() { return &metrics_map_; }
#if defined(OS_CHROMEOS)
// PowerManagerClient::Observer implementation:
void PowerChanged(const power_manager::PowerSupplyProperties& prop) override;
#endif
// Begin periodically updating the power consumption numbers by profile.
void Initialize();
// Calls UpdatePowerConsumption() and returns the total CPU percent.
double UpdatePowerConsumptionForTesting();
private:
// Starts the timer for updating the power consumption.
void StartTimer();
// Calls SynchronizerProcesses() and RecordCpuUsageByOrigin() to update the
// |metrics_map_| and attribute power consumption. Invoked by |timer_| and as
// a helper method for UpdatePowerConsumptionForTesting().
double UpdatePowerConsumption();
// Calls UpdatePowerConsumption(). Invoked by |timer_|.
void HandleUpdateTimeout();
// Synchronizes the currently active processes to the |metrics_map_| and
// returns the total amount of cpu usage in the cycle.
double SynchronizeProcesses();
// Attributes the power usage to the profiles and origins using the
// information from SynchronizeProcesses() given a total amount
// of CPU used in this cycle, |total_cpu_percent|.
void RecordCpuUsageByOrigin(double total_cpu_percent);
// Adds the information from a given RenderProcessHost to the |metrics_map_|
// for a given origin. Called by SynchronizeProcesses().
void UpdateProcessInMap(const content::RenderProcessHost* render_process,
const GURL& origin);
ProcessMetricsMap metrics_map_;
base::RepeatingTimer<ProcessPowerCollector> timer_;
// Callback to use to get CPU usage if set.
CpuUsageCallback cpu_usage_callback_;
// The factor to scale the CPU usage by.
double scale_factor_;
DISALLOW_COPY_AND_ASSIGN(ProcessPowerCollector);
};
#endif // CHROME_BROWSER_POWER_PROCESS_POWER_COLLECTOR_H_
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