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// Copyright 2013 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 "base/process/process_metrics.h"
#include "base/logging.h"
#include "base/values.h"
namespace base {
SystemMetrics::SystemMetrics() {
committed_memory_ = 0;
}
SystemMetrics SystemMetrics::Sample() {
SystemMetrics system_metrics;
system_metrics.committed_memory_ = GetSystemCommitCharge();
#if defined(OS_LINUX) || defined(OS_ANDROID)
GetSystemMemoryInfo(&system_metrics.memory_info_);
GetSystemDiskInfo(&system_metrics.disk_info_);
#endif
#if defined(OS_CHROMEOS)
GetSwapInfo(&system_metrics.swap_info_);
#endif
return system_metrics;
}
scoped_ptr<Value> SystemMetrics::ToValue() const {
scoped_ptr<DictionaryValue> res(new DictionaryValue());
res->SetInteger("committed_memory", static_cast<int>(committed_memory_));
#if defined(OS_LINUX) || defined(OS_ANDROID)
res->Set("meminfo", memory_info_.ToValue().release());
res->Set("diskinfo", disk_info_.ToValue().release());
#endif
#if defined(OS_CHROMEOS)
res->Set("swapinfo", swap_info_.ToValue().release());
#endif
return res.Pass();
}
double ProcessMetrics::GetPlatformIndependentCPUUsage() {
#if defined(OS_WIN)
return GetCPUUsage() * processor_count_;
#else
return GetCPUUsage();
#endif
}
#if defined(OS_MACOSX) || defined(OS_LINUX)
int ProcessMetrics::CalculateIdleWakeupsPerSecond(
uint64 absolute_idle_wakeups) {
TimeTicks time = TimeTicks::Now();
if (last_absolute_idle_wakeups_ == 0) {
// First call, just set the last values.
last_idle_wakeups_time_ = time;
last_absolute_idle_wakeups_ = absolute_idle_wakeups;
return 0;
}
int64 wakeups_delta = absolute_idle_wakeups - last_absolute_idle_wakeups_;
int64 time_delta = (time - last_idle_wakeups_time_).InMicroseconds();
if (time_delta == 0) {
NOTREACHED();
return 0;
}
last_idle_wakeups_time_ = time;
last_absolute_idle_wakeups_ = absolute_idle_wakeups;
// Round to average wakeups per second.
int64 wakeups_delta_for_ms = wakeups_delta * Time::kMicrosecondsPerSecond;
return (wakeups_delta_for_ms + time_delta / 2) / time_delta;
}
#else
int ProcessMetrics::GetIdleWakeupsPerSecond() {
NOTIMPLEMENTED(); // http://crbug.com/120488
return 0;
}
#endif // defined(OS_MACOSX) || defined(OS_LINUX)
} // namespace base
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