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// Copyright (c) 2009 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 "chrome/browser/chromeos/boot_times_loader.h"
#include <vector>
#include "base/command_line.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/histogram.h"
#include "base/message_loop.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "base/thread.h"
#include "base/time.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/common/chrome_switches.h"
namespace {
struct Stats {
std::string uptime;
std::string disk;
Stats() : uptime(std::string()), disk(std::string()) {}
};
}
namespace chromeos {
// File uptime logs are located in.
static const char kLogPath[] = "/tmp";
// Prefix for the time measurement files.
static const char kUptimePrefix[] = "uptime-";
// Prefix for the disk usage files.
static const char kDiskPrefix[] = "disk-";
// Name of the time that Chrome's main() is called.
static const char kChromeMain[] = "chrome-main";
// Delay in milliseconds between file read attempts.
static const int64 kReadAttemptDelayMs = 250;
BootTimesLoader::BootTimesLoader() : backend_(new Backend()) {
}
BootTimesLoader::Handle BootTimesLoader::GetBootTimes(
CancelableRequestConsumerBase* consumer,
BootTimesLoader::GetBootTimesCallback* callback) {
if (!g_browser_process->file_thread()) {
// This should only happen if Chrome is shutting down, so we don't do
// anything.
return 0;
}
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kTestType)) {
// TODO(davemoore) This avoids boottimes for tests. This needs to be
// replaced with a mock of BootTimesLoader.
return 0;
}
scoped_refptr<CancelableRequest<GetBootTimesCallback> > request(
new CancelableRequest<GetBootTimesCallback>(callback));
AddRequest(request, consumer);
ChromeThread::PostTask(
ChromeThread::FILE,
FROM_HERE,
NewRunnableMethod(backend_.get(), &Backend::GetBootTimes, request));
return request->handle();
}
// Extracts the uptime value from files located in /tmp, returning the
// value as a double in value.
static bool GetTime(const std::string& log, double* value) {
FilePath log_dir(kLogPath);
FilePath log_file = log_dir.Append(log);
std::string contents;
*value = 0.0;
if (file_util::ReadFileToString(log_file, &contents)) {
size_t space_index = contents.find(' ');
size_t chars_left =
space_index != std::string::npos ? space_index : std::string::npos;
std::string value_string = contents.substr(0, chars_left);
return StringToDouble(value_string, value);
}
return false;
}
// Converts double seconds to a TimeDelta object.
static base::TimeDelta SecondsToTimeDelta(double seconds) {
double ms = seconds * base::Time::kMillisecondsPerSecond;
return base::TimeDelta::FromMilliseconds(static_cast<int64>(ms));
}
// Reports the collected boot times to UMA if they haven't been
// reported yet and if metrics collection is enabled.
static void SendBootTimesToUMA(const BootTimesLoader::BootTimes& boot_times) {
// Checks if the times for the most recent boot event have been
// reported already to avoid sending boot time histogram samples
// every time the user logs out.
static const char kBootTimesSent[] = "/tmp/boot-times-sent";
FilePath sent(kBootTimesSent);
if (file_util::PathExists(sent))
return;
UMA_HISTOGRAM_TIMES("BootTime.Total",
SecondsToTimeDelta(boot_times.total));
UMA_HISTOGRAM_TIMES("BootTime.Firmware",
SecondsToTimeDelta(boot_times.firmware));
UMA_HISTOGRAM_TIMES("BootTime.Kernel",
SecondsToTimeDelta(boot_times.pre_startup));
UMA_HISTOGRAM_TIMES("BootTime.System",
SecondsToTimeDelta(boot_times.system));
if (boot_times.chrome > 0) {
UMA_HISTOGRAM_TIMES("BootTime.Chrome",
SecondsToTimeDelta(boot_times.chrome));
}
// Stores the boot times to a file in /tmp to indicate that the
// times for the most recent boot event have been reported
// already. The file will be deleted at system shutdown/reboot.
std::string boot_times_text = StringPrintf("total: %.2f\n"
"firmware: %.2f\n"
"kernel: %.2f\n"
"system: %.2f\n"
"chrome: %.2f\n",
boot_times.total,
boot_times.firmware,
boot_times.pre_startup,
boot_times.system,
boot_times.chrome);
file_util::WriteFile(sent, boot_times_text.data(), boot_times_text.size());
DCHECK(file_util::PathExists(sent));
}
void BootTimesLoader::Backend::GetBootTimes(
scoped_refptr<GetBootTimesRequest> request) {
const char* kFirmwareBootTime = "firmware-boot-time";
const char* kPreStartup = "pre-startup";
const char* kChromeExec = "chrome-exec";
const char* kChromeMain = "chrome-main";
const char* kXStarted = "x-started";
const char* kLoginPromptReady = "login-prompt-ready";
std::string uptime_prefix = kUptimePrefix;
if (request->canceled())
return;
// Wait until login_prompt_ready is output by reposting.
FilePath log_dir(kLogPath);
FilePath log_file = log_dir.Append(uptime_prefix + kLoginPromptReady);
if (!file_util::PathExists(log_file)) {
ChromeThread::PostDelayedTask(
ChromeThread::FILE,
FROM_HERE,
NewRunnableMethod(this, &Backend::GetBootTimes, request),
kReadAttemptDelayMs);
return;
}
BootTimes boot_times;
GetTime(kFirmwareBootTime, &boot_times.firmware);
GetTime(uptime_prefix + kPreStartup, &boot_times.pre_startup);
GetTime(uptime_prefix + kXStarted, &boot_times.x_started);
GetTime(uptime_prefix + kChromeExec, &boot_times.chrome_exec);
GetTime(uptime_prefix + kChromeMain, &boot_times.chrome_main);
GetTime(uptime_prefix + kLoginPromptReady, &boot_times.login_prompt_ready);
boot_times.total = boot_times.firmware + boot_times.login_prompt_ready;
if (boot_times.chrome_exec > 0) {
boot_times.system = boot_times.chrome_exec - boot_times.pre_startup;
boot_times.chrome = boot_times.login_prompt_ready - boot_times.chrome_exec;
} else {
boot_times.system = boot_times.login_prompt_ready - boot_times.pre_startup;
}
SendBootTimesToUMA(boot_times);
request->ForwardResult(
GetBootTimesCallback::TupleType(request->handle(), boot_times));
}
static void RecordStatsDelayed(
const std::string& name,
const std::string& uptime,
const std::string& disk) {
const FilePath log_path(kLogPath);
std::string disk_prefix = kDiskPrefix;
const FilePath uptime_output =
log_path.Append(FilePath(kUptimePrefix + name));
const FilePath disk_output = log_path.Append(FilePath(kDiskPrefix + name));
// Write out the files, ensuring that they don't exist already.
if (!file_util::PathExists(uptime_output))
file_util::WriteFile(uptime_output, uptime.data(), uptime.size());
if (!file_util::PathExists(disk_output))
file_util::WriteFile(disk_output, disk.data(), disk.size());
}
static void RecordStats(
const std::string& name, const Stats& stats) {
ChromeThread::PostTask(
ChromeThread::FILE, FROM_HERE,
NewRunnableFunction(RecordStatsDelayed, name, stats.uptime, stats.disk));
}
static Stats GetCurrentStats() {
const FilePath kProcUptime("/proc/uptime");
const FilePath kDiskStat("/sys/block/sda/stat");
Stats stats;
file_util::ReadFileToString(kProcUptime, &stats.uptime);
file_util::ReadFileToString(kDiskStat, &stats.disk);
return stats;
}
// static
void BootTimesLoader::RecordCurrentStats(const std::string& name) {
Stats stats = GetCurrentStats();
RecordStats(name, stats);
}
// Used to hold the stats at main().
static Stats chrome_main_stats_;
void BootTimesLoader::SaveChromeMainStats() {
chrome_main_stats_ = GetCurrentStats();
}
void BootTimesLoader::RecordChromeMainStats() {
RecordStats(kChromeMain, chrome_main_stats_);
}
} // namespace chromeos
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