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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 <limits>
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/process/process_metrics.h"
#include "chrome/browser/performance_monitor/constants.h"
#include "chrome/browser/performance_monitor/process_metrics_history.h"
#if defined(OS_MACOSX)
#include "content/public/browser/browser_child_process_host.h"
#endif
#include "content/public/common/process_type.h"
namespace performance_monitor {
ProcessMetricsHistory::ProcessMetricsHistory()
: process_handle_(0),
process_type_(content::PROCESS_TYPE_UNKNOWN),
last_update_sequence_(0) {
ResetCounters();
}
ProcessMetricsHistory::~ProcessMetricsHistory() {}
void ProcessMetricsHistory::ResetCounters() {
min_cpu_usage_ = std::numeric_limits<double>::max();
accumulated_cpu_usage_ = 0.0;
accumulated_private_bytes_ = 0;
accumulated_shared_bytes_ = 0;
sample_count_ = 0;
}
void ProcessMetricsHistory::Initialize(base::ProcessHandle process_handle,
int process_type,
int initial_update_sequence) {
DCHECK(process_handle_ == 0);
process_handle_ = process_handle;
process_type_ = process_type;
last_update_sequence_ = initial_update_sequence;
#if defined(OS_MACOSX)
process_metrics_.reset(base::ProcessMetrics::CreateProcessMetrics(
process_handle_, content::BrowserChildProcessHost::GetPortProvider()));
#else
process_metrics_.reset(
base::ProcessMetrics::CreateProcessMetrics(process_handle_));
#endif
}
void ProcessMetricsHistory::SampleMetrics() {
double cpu_usage = process_metrics_->GetPlatformIndependentCPUUsage();
min_cpu_usage_ = std::min(min_cpu_usage_, cpu_usage);
accumulated_cpu_usage_ += cpu_usage;
size_t private_bytes = 0;
size_t shared_bytes = 0;
if (!process_metrics_->GetMemoryBytes(&private_bytes, &shared_bytes))
LOG(WARNING) << "GetMemoryBytes returned NULL (platform-specific error)";
accumulated_private_bytes_ += private_bytes;
accumulated_shared_bytes_ += shared_bytes;
sample_count_++;
}
void ProcessMetricsHistory::EndOfCycle() {
RunPerformanceTriggers();
ResetCounters();
}
void ProcessMetricsHistory::RunPerformanceTriggers() {
if (sample_count_ == 0)
return;
// We scale up to the equivalent of 64 CPU cores fully loaded. More than this
// doesn't really matter, as we're already in a terrible place.
const int kHistogramMin = 0;
const int kHistogramMax = 6400;
const int kHistogramBucketCount = 50;
const double average_cpu_usage = accumulated_cpu_usage_ / sample_count_;
// The histogram macros don't support variables as histogram names,
// hence the macro duplication for each process type.
switch (process_type_) {
case content::PROCESS_TYPE_BROWSER:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.BrowserProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
// If CPU usage has consistently been above our threshold,
// we *may* have an issue.
if (min_cpu_usage_ > kHighCPUUtilizationThreshold) {
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.BrowserProcess",
true);
}
break;
case content::PROCESS_TYPE_RENDERER:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.RendererProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
if (min_cpu_usage_ > kHighCPUUtilizationThreshold) {
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.RendererProcess",
true);
}
break;
case content::PROCESS_TYPE_PLUGIN:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.PluginProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
if (min_cpu_usage_ > kHighCPUUtilizationThreshold)
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.PluginProcess", true);
break;
case content::PROCESS_TYPE_WORKER:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.WorkerProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
if (min_cpu_usage_ > kHighCPUUtilizationThreshold)
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.WorkerProcess", true);
break;
case content::PROCESS_TYPE_GPU:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.GPUProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
if (min_cpu_usage_ > kHighCPUUtilizationThreshold)
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.GPUProcess", true);
break;
case content::PROCESS_TYPE_PPAPI_PLUGIN:
UMA_HISTOGRAM_CUSTOM_COUNTS(
"PerformanceMonitor.AverageCPU.PPAPIProcess", average_cpu_usage,
kHistogramMin, kHistogramMax, kHistogramBucketCount);
if (min_cpu_usage_ > kHighCPUUtilizationThreshold)
UMA_HISTOGRAM_BOOLEAN("PerformanceMonitor.HighCPU.PPAPIProcess", true);
break;
default:
break;
}
}
} // namespace performance_monitor
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