base/process/process_metrics.cc

   1 // Copyright 2013 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 "base/process/process_metrics.h"
   6
   7 #include "base/logging.h"
   8 #include "base/values.h"
   9
  10 namespace base {
  11
  12 SystemMetrics::SystemMetrics() {
  13   committed_memory_ = 0;
  14 }
  15
  16 SystemMetrics SystemMetrics::Sample() {
  17   SystemMetrics system_metrics;
  18
  19   system_metrics.committed_memory_ = GetSystemCommitCharge();
  20 #if defined(OS_LINUX) || defined(OS_ANDROID)
  21   GetSystemMemoryInfo(&system_metrics.memory_info_);
  22   GetSystemDiskInfo(&system_metrics.disk_info_);
  23 #endif
  24 #if defined(OS_CHROMEOS)
  25   GetSwapInfo(&system_metrics.swap_info_);
  26 #endif
  27
  28   return system_metrics;
  29 }
  30
  31 scoped_ptr<Value> SystemMetrics::ToValue() const {
  32   scoped_ptr<DictionaryValue> res(new DictionaryValue());
  33
  34   res->SetInteger("committed_memory", static_cast<int>(committed_memory_));
  35 #if defined(OS_LINUX) || defined(OS_ANDROID)
  36   res->Set("meminfo", memory_info_.ToValue().release());
  37   res->Set("diskinfo", disk_info_.ToValue().release());
  38 #endif
  39 #if defined(OS_CHROMEOS)
  40   res->Set("swapinfo", swap_info_.ToValue().release());
  41 #endif
  42
  43   return res.Pass();
  44 }
  45
  46 double ProcessMetrics::GetPlatformIndependentCPUUsage() {
  47 #if defined(OS_WIN)
  48   return GetCPUUsage() * processor_count_;
  49 #else
  50   return GetCPUUsage();
  51 #endif
  52 }
  53
  54 #if defined(OS_MACOSX) || defined(OS_LINUX)
  55 int ProcessMetrics::CalculateIdleWakeupsPerSecond(
  56     uint64 absolute_idle_wakeups) {
  57   TimeTicks time = TimeTicks::Now();
  58
  59   if (last_absolute_idle_wakeups_ == 0) {
  60     // First call, just set the last values.
  61     last_idle_wakeups_time_ = time;
  62     last_absolute_idle_wakeups_ = absolute_idle_wakeups;
  63     return 0;
  64   }
  65
  66   int64 wakeups_delta = absolute_idle_wakeups - last_absolute_idle_wakeups_;
  67   int64 time_delta = (time - last_idle_wakeups_time_).InMicroseconds();
  68   if (time_delta == 0) {
  69     NOTREACHED();
  70     return 0;
  71   }
  72
  73   last_idle_wakeups_time_ = time;
  74   last_absolute_idle_wakeups_ = absolute_idle_wakeups;
  75
  76   // Round to average wakeups per second.
  77   int64 wakeups_delta_for_ms = wakeups_delta * Time::kMicrosecondsPerSecond;
  78   return (wakeups_delta_for_ms + time_delta / 2) / time_delta;
  79 }
  80 #else
  81 int ProcessMetrics::GetIdleWakeupsPerSecond() {
  82   NOTIMPLEMENTED();  // http://crbug.com/120488
  83   return 0;
  84 }
  85 #endif  // defined(OS_MACOSX) || defined(OS_LINUX)
  86
  87 }  // namespace base