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      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 <utility>
      8 
      9 #include "base/logging.h"
     10 #include "base/values.h"
     11 #include "build/build_config.h"
     12 
     13 namespace base {
     14 
     15 SystemMetrics::SystemMetrics() {
     16   committed_memory_ = 0;
     17 }
     18 
     19 SystemMetrics SystemMetrics::Sample() {
     20   SystemMetrics system_metrics;
     21 
     22   system_metrics.committed_memory_ = GetSystemCommitCharge();
     23 #if defined(OS_LINUX) || defined(OS_ANDROID)
     24   GetSystemMemoryInfo(&system_metrics.memory_info_);
     25   GetSystemDiskInfo(&system_metrics.disk_info_);
     26 #endif
     27 #if defined(OS_CHROMEOS)
     28   GetSwapInfo(&system_metrics.swap_info_);
     29 #endif
     30 
     31   return system_metrics;
     32 }
     33 
     34 std::unique_ptr<Value> SystemMetrics::ToValue() const {
     35   std::unique_ptr<DictionaryValue> res(new DictionaryValue());
     36 
     37   res->SetInteger("committed_memory", static_cast<int>(committed_memory_));
     38 #if defined(OS_LINUX) || defined(OS_ANDROID)
     39   res->Set("meminfo", memory_info_.ToValue());
     40   res->Set("diskinfo", disk_info_.ToValue());
     41 #endif
     42 #if defined(OS_CHROMEOS)
     43   res->Set("swapinfo", swap_info_.ToValue());
     44 #endif
     45 
     46   return std::move(res);
     47 }
     48 
     49 ProcessMetrics* ProcessMetrics::CreateCurrentProcessMetrics() {
     50 #if !defined(OS_MACOSX) || defined(OS_IOS)
     51   return CreateProcessMetrics(base::GetCurrentProcessHandle());
     52 #else
     53   return CreateProcessMetrics(base::GetCurrentProcessHandle(), nullptr);
     54 #endif  // !defined(OS_MACOSX) || defined(OS_IOS)
     55 }
     56 
     57 double ProcessMetrics::GetPlatformIndependentCPUUsage() {
     58 #if defined(OS_WIN)
     59   return GetCPUUsage() * processor_count_;
     60 #else
     61   return GetCPUUsage();
     62 #endif
     63 }
     64 
     65 #if defined(OS_MACOSX) || defined(OS_LINUX)
     66 int ProcessMetrics::CalculateIdleWakeupsPerSecond(
     67     uint64_t absolute_idle_wakeups) {
     68   TimeTicks time = TimeTicks::Now();
     69 
     70   if (last_absolute_idle_wakeups_ == 0) {
     71     // First call, just set the last values.
     72     last_idle_wakeups_time_ = time;
     73     last_absolute_idle_wakeups_ = absolute_idle_wakeups;
     74     return 0;
     75   }
     76 
     77   int64_t wakeups_delta = absolute_idle_wakeups - last_absolute_idle_wakeups_;
     78   int64_t time_delta = (time - last_idle_wakeups_time_).InMicroseconds();
     79   if (time_delta == 0) {
     80     NOTREACHED();
     81     return 0;
     82   }
     83 
     84   last_idle_wakeups_time_ = time;
     85   last_absolute_idle_wakeups_ = absolute_idle_wakeups;
     86 
     87   // Round to average wakeups per second.
     88   int64_t wakeups_delta_for_ms = wakeups_delta * Time::kMicrosecondsPerSecond;
     89   return (wakeups_delta_for_ms + time_delta / 2) / time_delta;
     90 }
     91 #else
     92 int ProcessMetrics::GetIdleWakeupsPerSecond() {
     93   NOTIMPLEMENTED();  // http://crbug.com/120488
     94   return 0;
     95 }
     96 #endif  // defined(OS_MACOSX) || defined(OS_LINUX)
     97 
     98 }  // namespace base
     99