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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.
#include "content/browser/power_profiler/power_data_provider_ia_win.h"
#include "base/basictypes.h"
#include "base/logging.h"
namespace content {
// Default sampling period, as recommended by Intel Power Gadget.
// Section 3.1 of
// http://software.intel.com/en-us/blogs/2013/10/03/using-the-intel-power-gadget-api-on-windows
const int kDefaultSamplePeriodMs = 50;
scoped_ptr<PowerDataProvider> PowerDataProvider::Create() {
scoped_ptr<PowerDataProviderIA> provider(new PowerDataProviderIA());
if (provider->Initialize())
return make_scoped_ptr<PowerDataProvider>(provider.release());
return make_scoped_ptr<PowerDataProvider>(NULL);
}
PowerDataProviderIA::PowerDataProviderIA()
: sockets_number_(0),
is_open_(false) {
for (int i = 0; i < PowerEvent::ID_COUNT; i++ )
power_msr_ids_[i] = -1;
}
PowerDataProviderIA::~PowerDataProviderIA() {
}
PowerEventVector PowerDataProviderIA::GetData() {
PowerEventVector events;
if (!energy_lib_.ReadSample())
return events;
PowerEvent event;
double package_power = 0.0;
double power[3];
int data_count;
for (int i = 0; i < sockets_number_; i++) {
if (power_msr_ids_[PowerEvent::SOC_PACKAGE] == -1)
break;
energy_lib_.GetPowerData(i,
power_msr_ids_[PowerEvent::SOC_PACKAGE], power, &data_count);
package_power += power[0];
}
event.type = PowerEvent::SOC_PACKAGE;
event.value = package_power;
event.time = base::TimeTicks::Now();
events.push_back(event);
return events;
}
base::TimeDelta PowerDataProviderIA::GetSamplingRate() {
return base::TimeDelta::FromMilliseconds(kDefaultSamplePeriodMs);
}
PowerDataProvider::AccuracyLevel PowerDataProviderIA::GetAccuracyLevel() {
return High;
}
bool PowerDataProviderIA::Initialize() {
if (is_open_)
return true;
if (!energy_lib_.IntelEnergyLibInitialize()) {
LOG(ERROR) << "Power Data Provider initialize failed!";
return false;
}
energy_lib_.GetNumNodes(&sockets_number_);
const std::wstring package_msr_name = L"Processor";
int msr_number;
energy_lib_.GetNumMsrs(&msr_number);
int func_id;
wchar_t name[32];
for(int i = 0; i < msr_number; i++) {
energy_lib_.GetMsrFunc(i, &func_id);
energy_lib_.GetMsrName(i, name);
if (func_id != 1)
continue;
if (package_msr_name.compare(name) == 0)
power_msr_ids_[PowerEvent::SOC_PACKAGE] = i;
}
is_open_ = true;
return true;
}
} // namespace content
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