content/browser/power_profiler/power_data_provider_ia_win.cc

   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 #include "content/browser/power_profiler/power_data_provider_ia_win.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace content {
  10
  11 scoped_ptr<PowerDataProvider> PowerDataProvider::Create() {
  12   scoped_ptr<PowerDataProviderIA> provider(new PowerDataProviderIA());
  13   if (provider->Initialize())
  14     return make_scoped_ptr<PowerDataProvider>(provider.release());
  15
  16   return make_scoped_ptr<PowerDataProvider>(NULL);
  17 }
  18
  19 PowerDataProviderIA::PowerDataProviderIA()
  20     : sockets_number_(0),
  21       is_open_(false) {
  22   for (int i = 0; i < PowerEvent::ID_COUNT; i++ )
  23       power_msr_ids_[i] = -1;
  24 }
  25
  26 PowerDataProviderIA::~PowerDataProviderIA() {
  27 }
  28
  29 PowerEventVector PowerDataProviderIA::GetData() {
  30   PowerEventVector events;
  31
  32   if (!energy_lib_.ReadSample())
  33     return events;
  34
  35   PowerEvent event;
  36   double package_power = 0.0;
  37   double power[3];
  38   int data_count;
  39
  40   for (int i = 0; i < sockets_number_; i++) {
  41     if (power_msr_ids_[PowerEvent::SOC_PACKAGE] == -1)
  42       break;
  43
  44     energy_lib_.GetPowerData(i,
  45         power_msr_ids_[PowerEvent::SOC_PACKAGE], power, &data_count);
  46     package_power += power[0];
  47   }
  48
  49   event.type = PowerEvent::SOC_PACKAGE;
  50   event.value = package_power;
  51   event.time = base::TimeTicks::Now();
  52   events.push_back(event);
  53
  54   return events;
  55 }
  56
  57 bool PowerDataProviderIA::Initialize() {
  58   if (is_open_)
  59     return true;
  60
  61   if (!energy_lib_.IntelEnergyLibInitialize()) {
  62     LOG(ERROR) << "Power Data Provider initialize failed!";
  63     return false;
  64   }
  65
  66   energy_lib_.GetNumNodes(&sockets_number_);
  67
  68   const std::wstring package_msr_name = L"Processor";
  69
  70   int msr_number;
  71   energy_lib_.GetNumMsrs(&msr_number);
  72
  73   int func_id;
  74   wchar_t name[32];
  75   for(int i = 0; i < msr_number; i++) {
  76     energy_lib_.GetMsrFunc(i, &func_id);
  77     energy_lib_.GetMsrName(i, name);
  78
  79     if (func_id != 1)
  80       continue;
  81
  82     if (package_msr_name.compare(name) == 0)
  83       power_msr_ids_[PowerEvent::SOC_PACKAGE] = i;
  84   }
  85
  86   is_open_ = true;
  87   return true;
  88 }
  89
  90 }  // namespace content