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platform_system_core/metricsd/metrics_daemon.cc
Bertrand SIMONNET 0ada2ca1dc metricsd: Collect average cpu usage information. 
Collect a new histogram (Platform.CpuUsage.Percent), collecting the
average cpu usage in percent of the total cpu usage possible (across all
cpus).
This measurement is collected every minute.

Bug: 25231576
Test: unit tests.
Test: Manual testing.

Change-Id: I1c63486c177f0c2d4bd361eb9e351a7ca25b80d9
2015-11-04 12:14:13 -08:00

898 lines
31 KiB
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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "metrics_daemon.h"
#include <sysexits.h>
#include <time.h>
#include <base/bind.h>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/hash.h>
#include <base/logging.h>
#include <base/strings/string_number_conversions.h>
#include <base/strings/string_split.h>
#include <base/strings/string_util.h>
#include <base/strings/stringprintf.h>
#include <brillo/osrelease_reader.h>
#include <dbus/dbus.h>
#include <dbus/message.h>
#include "constants.h"
#include "uploader/upload_service.h"
using base::FilePath;
using base::StringPrintf;
using base::Time;
using base::TimeDelta;
using base::TimeTicks;
using chromeos_metrics::PersistentInteger;
using com::android::Weave::CommandProxy;
using com::android::Weave::ManagerProxy;
using std::map;
using std::string;
using std::vector;
namespace {
const char kCrashReporterInterface[] = "org.chromium.CrashReporter";
const char kCrashReporterUserCrashSignal[] = "UserCrash";
const char kCrashReporterMatchRule[] =
"type='signal',interface='%s',path='/',member='%s'";
const int kSecondsPerMinute = 60;
const int kMinutesPerHour = 60;
const int kHoursPerDay = 24;
const int kMinutesPerDay = kHoursPerDay * kMinutesPerHour;
const int kSecondsPerDay = kSecondsPerMinute * kMinutesPerDay;
const int kDaysPerWeek = 7;
const int kSecondsPerWeek = kSecondsPerDay * kDaysPerWeek;
// Interval between calls to UpdateStats().
const uint32_t kUpdateStatsIntervalMs = 300000;
const char kKernelCrashDetectedFile[] = "/var/run/kernel-crash-detected";
const char kUncleanShutdownDetectedFile[] =
"/var/run/unclean-shutdown-detected";
const int kMetricMeminfoInterval = 30; // seconds
const char kMeminfoFileName[] = "/proc/meminfo";
const char kVmStatFileName[] = "/proc/vmstat";
// Thermal CPU throttling.
const char kMetricScaledCpuFrequencyName[] =
"Platform.CpuFrequencyThermalScaling";
} // namespace
// Zram sysfs entries.
const char MetricsDaemon::kComprDataSizeName[] = "compr_data_size";
const char MetricsDaemon::kOrigDataSizeName[] = "orig_data_size";
const char MetricsDaemon::kZeroPagesName[] = "zero_pages";
// Memory use stats collection intervals. We collect some memory use interval
// at these intervals after boot, and we stop collecting after the last one,
// with the assumption that in most cases the memory use won't change much
// after that.
static const int kMemuseIntervals[] = {
1 * kSecondsPerMinute, // 1 minute mark
4 * kSecondsPerMinute, // 5 minute mark
25 * kSecondsPerMinute, // 0.5 hour mark
120 * kSecondsPerMinute, // 2.5 hour mark
600 * kSecondsPerMinute, // 12.5 hour mark
};
MetricsDaemon::MetricsDaemon()
: memuse_final_time_(0),
memuse_interval_index_(0) {}
MetricsDaemon::~MetricsDaemon() {
}
// static
double MetricsDaemon::GetActiveTime() {
struct timespec ts;
int r = clock_gettime(CLOCK_MONOTONIC, &ts);
if (r < 0) {
PLOG(WARNING) << "clock_gettime(CLOCK_MONOTONIC) failed";
return 0;
} else {
return ts.tv_sec + static_cast<double>(ts.tv_nsec) / (1000 * 1000 * 1000);
}
}
int MetricsDaemon::Run() {
if (CheckSystemCrash(kKernelCrashDetectedFile)) {
ProcessKernelCrash();
}
if (CheckSystemCrash(kUncleanShutdownDetectedFile)) {
ProcessUncleanShutdown();
}
// On OS version change, clear version stats (which are reported daily).
int32_t version = GetOsVersionHash();
if (version_cycle_->Get() != version) {
version_cycle_->Set(version);
kernel_crashes_version_count_->Set(0);
version_cumulative_active_use_->Set(0);
version_cumulative_cpu_use_->Set(0);
}
return brillo::DBusDaemon::Run();
}
void MetricsDaemon::RunUploaderTest() {
upload_service_.reset(new UploadService(
new SystemProfileCache(true, metrics_directory_),
metrics_lib_,
server_));
upload_service_->Init(upload_interval_, metrics_directory_);
upload_service_->UploadEvent();
}
uint32_t MetricsDaemon::GetOsVersionHash() {
brillo::OsReleaseReader reader;
reader.Load();
string version;
if (!reader.GetString(metrics::kProductVersion, &version)) {
LOG(ERROR) << "failed to read the product version.";
version = metrics::kDefaultVersion;
}
uint32_t version_hash = base::Hash(version);
if (testing_) {
version_hash = 42; // return any plausible value for the hash
}
return version_hash;
}
void MetricsDaemon::Init(bool testing,
bool uploader_active,
bool dbus_enabled,
MetricsLibraryInterface* metrics_lib,
const string& diskstats_path,
const string& scaling_max_freq_path,
const string& cpuinfo_max_freq_path,
const base::TimeDelta& upload_interval,
const string& server,
const base::FilePath& metrics_directory) {
CHECK(metrics_lib);
testing_ = testing;
uploader_active_ = uploader_active;
dbus_enabled_ = dbus_enabled;
metrics_directory_ = metrics_directory;
metrics_lib_ = metrics_lib;
upload_interval_ = upload_interval;
server_ = server;
daily_active_use_.reset(
new PersistentInteger("Platform.UseTime.PerDay"));
version_cumulative_active_use_.reset(
new PersistentInteger("Platform.CumulativeUseTime"));
version_cumulative_cpu_use_.reset(
new PersistentInteger("Platform.CumulativeCpuTime"));
kernel_crash_interval_.reset(
new PersistentInteger("Platform.KernelCrashInterval"));
unclean_shutdown_interval_.reset(
new PersistentInteger("Platform.UncleanShutdownInterval"));
user_crash_interval_.reset(
new PersistentInteger("Platform.UserCrashInterval"));
any_crashes_daily_count_.reset(
new PersistentInteger("Platform.AnyCrashes.PerDay"));
any_crashes_weekly_count_.reset(
new PersistentInteger("Platform.AnyCrashes.PerWeek"));
user_crashes_daily_count_.reset(
new PersistentInteger("Platform.UserCrashes.PerDay"));
user_crashes_weekly_count_.reset(
new PersistentInteger("Platform.UserCrashes.PerWeek"));
kernel_crashes_daily_count_.reset(
new PersistentInteger("Platform.KernelCrashes.PerDay"));
kernel_crashes_weekly_count_.reset(
new PersistentInteger("Platform.KernelCrashes.PerWeek"));
kernel_crashes_version_count_.reset(
new PersistentInteger("Platform.KernelCrashesSinceUpdate"));
unclean_shutdowns_daily_count_.reset(
new PersistentInteger("Platform.UncleanShutdown.PerDay"));
unclean_shutdowns_weekly_count_.reset(
new PersistentInteger("Platform.UncleanShutdowns.PerWeek"));
daily_cycle_.reset(new PersistentInteger("daily.cycle"));
weekly_cycle_.reset(new PersistentInteger("weekly.cycle"));
version_cycle_.reset(new PersistentInteger("version.cycle"));
scaling_max_freq_path_ = scaling_max_freq_path;
cpuinfo_max_freq_path_ = cpuinfo_max_freq_path;
disk_usage_collector_.reset(new DiskUsageCollector(metrics_lib_));
averaged_stats_collector_.reset(
new AveragedStatisticsCollector(metrics_lib_, diskstats_path,
kVmStatFileName));
cpu_usage_collector_.reset(new CpuUsageCollector(metrics_lib_));
}
int MetricsDaemon::OnInit() {
int return_code = dbus_enabled_ ? brillo::DBusDaemon::OnInit() :
brillo::Daemon::OnInit();
if (return_code != EX_OK)
return return_code;
StatsReporterInit();
// Start collecting meminfo stats.
ScheduleMeminfoCallback(kMetricMeminfoInterval);
memuse_final_time_ = GetActiveTime() + kMemuseIntervals[0];
ScheduleMemuseCallback(kMemuseIntervals[0]);
if (testing_)
return EX_OK;
if (dbus_enabled_) {
bus_->AssertOnDBusThread();
CHECK(bus_->SetUpAsyncOperations());
if (bus_->is_connected()) {
const std::string match_rule =
base::StringPrintf(kCrashReporterMatchRule,
kCrashReporterInterface,
kCrashReporterUserCrashSignal);
bus_->AddFilterFunction(&MetricsDaemon::MessageFilter, this);
DBusError error;
dbus_error_init(&error);
bus_->AddMatch(match_rule, &error);
if (dbus_error_is_set(&error)) {
LOG(ERROR) << "Failed to add match rule \"" << match_rule << "\". Got "
<< error.name << ": " << error.message;
return EX_SOFTWARE;
}
} else {
LOG(ERROR) << "DBus isn't connected.";
return EX_UNAVAILABLE;
}
device_ = weaved::Device::CreateInstance(
bus_,
base::Bind(&MetricsDaemon::UpdateWeaveState, base::Unretained(this)));
device_->AddCommandHandler(
"_metrics._enableAnalyticsReporting",
base::Bind(&MetricsDaemon::OnEnableMetrics, base::Unretained(this)));
device_->AddCommandHandler(
"_metrics._disableAnalyticsReporting",
base::Bind(&MetricsDaemon::OnDisableMetrics, base::Unretained(this)));
}
latest_cpu_use_microseconds_ = cpu_usage_collector_->GetCumulativeCpuUse();
base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&MetricsDaemon::HandleUpdateStatsTimeout,
base::Unretained(this)),
base::TimeDelta::FromMilliseconds(kUpdateStatsIntervalMs));
if (uploader_active_) {
upload_service_.reset(
new UploadService(new SystemProfileCache(), metrics_lib_, server_));
upload_service_->Init(upload_interval_, metrics_directory_);
}
return EX_OK;
}
void MetricsDaemon::OnShutdown(int* return_code) {
if (!testing_ && dbus_enabled_ && bus_->is_connected()) {
const std::string match_rule =
base::StringPrintf(kCrashReporterMatchRule,
kCrashReporterInterface,
kCrashReporterUserCrashSignal);
bus_->RemoveFilterFunction(&MetricsDaemon::MessageFilter, this);
DBusError error;
dbus_error_init(&error);
bus_->RemoveMatch(match_rule, &error);
if (dbus_error_is_set(&error)) {
LOG(ERROR) << "Failed to remove match rule \"" << match_rule << "\". Got "
<< error.name << ": " << error.message;
}
}
brillo::DBusDaemon::OnShutdown(return_code);
}
void MetricsDaemon::OnEnableMetrics(const std::weak_ptr<weaved::Command>& cmd) {
auto command = cmd.lock();
if (!command)
return;
if (base::WriteFile(metrics_directory_.Append(metrics::kConsentFileName),
"", 0) != 0) {
PLOG(ERROR) << "Could not create the consent file.";
command->Abort("metrics_error", "Could not create the consent file",
nullptr);
return;
}
UpdateWeaveState();
command->Complete({}, nullptr);
}
void MetricsDaemon::OnDisableMetrics(
const std::weak_ptr<weaved::Command>& cmd) {
auto command = cmd.lock();
if (!command)
return;
if (!base::DeleteFile(metrics_directory_.Append(metrics::kConsentFileName),
false)) {
PLOG(ERROR) << "Could not delete the consent file.";
command->Abort("metrics_error", "Could not delete the consent file",
nullptr);
return;
}
UpdateWeaveState();
command->Complete({}, nullptr);
}
void MetricsDaemon::UpdateWeaveState() {
if (!device_)
return;
brillo::VariantDictionary state_change{
{ "_metrics._AnalyticsReportingState",
metrics_lib_->AreMetricsEnabled() ? "enabled" : "disabled" }
};
if (!device_->SetStateProperties(state_change, nullptr)) {
LOG(ERROR) << "failed to update weave's state";
}
}
// static
DBusHandlerResult MetricsDaemon::MessageFilter(DBusConnection* connection,
DBusMessage* message,
void* user_data) {
int message_type = dbus_message_get_type(message);
if (message_type != DBUS_MESSAGE_TYPE_SIGNAL) {
DLOG(WARNING) << "unexpected message type " << message_type;
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
// Signal messages always have interfaces.
const std::string interface(dbus_message_get_interface(message));
const std::string member(dbus_message_get_member(message));
DLOG(INFO) << "Got " << interface << "." << member << " D-Bus signal";
MetricsDaemon* daemon = static_cast<MetricsDaemon*>(user_data);
DBusMessageIter iter;
dbus_message_iter_init(message, &iter);
if (interface == kCrashReporterInterface) {
CHECK_EQ(member, kCrashReporterUserCrashSignal);
daemon->ProcessUserCrash();
} else {
// Ignore messages from the bus itself.
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
return DBUS_HANDLER_RESULT_HANDLED;
}
void MetricsDaemon::ProcessUserCrash() {
// Counts the active time up to now.
UpdateStats(TimeTicks::Now(), Time::Now());
// Reports the active use time since the last crash and resets it.
SendAndResetCrashIntervalSample(user_crash_interval_);
any_crashes_daily_count_->Add(1);
any_crashes_weekly_count_->Add(1);
user_crashes_daily_count_->Add(1);
user_crashes_weekly_count_->Add(1);
}
void MetricsDaemon::ProcessKernelCrash() {
// Counts the active time up to now.
UpdateStats(TimeTicks::Now(), Time::Now());
// Reports the active use time since the last crash and resets it.
SendAndResetCrashIntervalSample(kernel_crash_interval_);
any_crashes_daily_count_->Add(1);
any_crashes_weekly_count_->Add(1);
kernel_crashes_daily_count_->Add(1);
kernel_crashes_weekly_count_->Add(1);
kernel_crashes_version_count_->Add(1);
}
void MetricsDaemon::ProcessUncleanShutdown() {
// Counts the active time up to now.
UpdateStats(TimeTicks::Now(), Time::Now());
// Reports the active use time since the last crash and resets it.
SendAndResetCrashIntervalSample(unclean_shutdown_interval_);
unclean_shutdowns_daily_count_->Add(1);
unclean_shutdowns_weekly_count_->Add(1);
any_crashes_daily_count_->Add(1);
any_crashes_weekly_count_->Add(1);
}
bool MetricsDaemon::CheckSystemCrash(const string& crash_file) {
FilePath crash_detected(crash_file);
if (!base::PathExists(crash_detected))
return false;
// Deletes the crash-detected file so that the daemon doesn't report
// another kernel crash in case it's restarted.
base::DeleteFile(crash_detected, false); // not recursive
return true;
}
void MetricsDaemon::StatsReporterInit() {
disk_usage_collector_->Schedule();
cpu_usage_collector_->Init();
cpu_usage_collector_->Schedule();
// Don't start a collection cycle during the first run to avoid delaying the
// boot.
averaged_stats_collector_->ScheduleWait();
}
bool MetricsDaemon::ReadFreqToInt(const string& sysfs_file_name, int* value) {
const FilePath sysfs_path(sysfs_file_name);
string value_string;
if (!base::ReadFileToString(sysfs_path, &value_string)) {
LOG(WARNING) << "cannot read " << sysfs_path.value().c_str();
return false;
}
if (!base::RemoveChars(value_string, "\n", &value_string)) {
LOG(WARNING) << "no newline in " << value_string;
// Continue even though the lack of newline is suspicious.
}
if (!base::StringToInt(value_string, value)) {
LOG(WARNING) << "cannot convert " << value_string << " to int";
return false;
}
return true;
}
void MetricsDaemon::SendCpuThrottleMetrics() {
// |max_freq| is 0 only the first time through.
static int max_freq = 0;
if (max_freq == -1)
// Give up, as sysfs did not report max_freq correctly.
return;
if (max_freq == 0 || testing_) {
// One-time initialization of max_freq. (Every time when testing.)
if (!ReadFreqToInt(cpuinfo_max_freq_path_, &max_freq)) {
max_freq = -1;
return;
}
if (max_freq == 0) {
LOG(WARNING) << "sysfs reports 0 max CPU frequency\n";
max_freq = -1;
return;
}
if (max_freq % 10000 == 1000) {
// Special case: system has turbo mode, and max non-turbo frequency is
// max_freq - 1000. This relies on "normal" (non-turbo) frequencies
// being multiples of (at least) 10 MHz. Although there is no guarantee
// of this, it seems a fairly reasonable assumption. Otherwise we should
// read scaling_available_frequencies, sort the frequencies, compare the
// two highest ones, and check if they differ by 1000 (kHz) (and that's a
// hack too, no telling when it will change).
max_freq -= 1000;
}
}
int scaled_freq = 0;
if (!ReadFreqToInt(scaling_max_freq_path_, &scaled_freq))
return;
// Frequencies are in kHz. If scaled_freq > max_freq, turbo is on, but
// scaled_freq is not the actual turbo frequency. We indicate this situation
// with a 101% value.
int percent = scaled_freq > max_freq ? 101 : scaled_freq / (max_freq / 100);
SendLinearSample(kMetricScaledCpuFrequencyName, percent, 101, 102);
}
void MetricsDaemon::ScheduleMeminfoCallback(int wait) {
if (testing_) {
return;
}
base::TimeDelta waitDelta = base::TimeDelta::FromSeconds(wait);
base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&MetricsDaemon::MeminfoCallback, base::Unretained(this),
waitDelta),
waitDelta);
}
void MetricsDaemon::MeminfoCallback(base::TimeDelta wait) {
string meminfo_raw;
const FilePath meminfo_path(kMeminfoFileName);
if (!base::ReadFileToString(meminfo_path, &meminfo_raw)) {
LOG(WARNING) << "cannot read " << meminfo_path.value().c_str();
return;
}
// Make both calls even if the first one fails.
if (ProcessMeminfo(meminfo_raw)) {
base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&MetricsDaemon::MeminfoCallback, base::Unretained(this),
wait),
wait);
}
}
// static
bool MetricsDaemon::ReadFileToUint64(const base::FilePath& path,
uint64_t* value) {
std::string content;
if (!base::ReadFileToString(path, &content)) {
PLOG(WARNING) << "cannot read " << path.MaybeAsASCII();
return false;
}
// Remove final newline.
base::TrimWhitespaceASCII(content, base::TRIM_TRAILING, &content);
if (!base::StringToUint64(content, value)) {
LOG(WARNING) << "invalid integer: " << content;
return false;
}
return true;
}
bool MetricsDaemon::ReportZram(const base::FilePath& zram_dir) {
// Data sizes are in bytes. |zero_pages| is in number of pages.
uint64_t compr_data_size, orig_data_size, zero_pages;
const size_t page_size = 4096;
if (!ReadFileToUint64(zram_dir.Append(kComprDataSizeName),
&compr_data_size) ||
!ReadFileToUint64(zram_dir.Append(kOrigDataSizeName), &orig_data_size) ||
!ReadFileToUint64(zram_dir.Append(kZeroPagesName), &zero_pages)) {
return false;
}
// |orig_data_size| does not include zero-filled pages.
orig_data_size += zero_pages * page_size;
const int compr_data_size_mb = compr_data_size >> 20;
const int savings_mb = (orig_data_size - compr_data_size) >> 20;
const int zero_ratio_percent = zero_pages * page_size * 100 / orig_data_size;
// Report compressed size in megabytes. 100 MB or less has little impact.
SendSample("Platform.ZramCompressedSize", compr_data_size_mb, 100, 4000, 50);
SendSample("Platform.ZramSavings", savings_mb, 100, 4000, 50);
// The compression ratio is multiplied by 100 for better resolution. The
// ratios of interest are between 1 and 6 (100% and 600% as reported). We
// don't want samples when very little memory is being compressed.
if (compr_data_size_mb >= 1) {
SendSample("Platform.ZramCompressionRatioPercent",
orig_data_size * 100 / compr_data_size, 100, 600, 50);
}
// The values of interest for zero_pages are between 1MB and 1GB. The units
// are number of pages.
SendSample("Platform.ZramZeroPages", zero_pages, 256, 256 * 1024, 50);
SendSample("Platform.ZramZeroRatioPercent", zero_ratio_percent, 1, 50, 50);
return true;
}
bool MetricsDaemon::ProcessMeminfo(const string& meminfo_raw) {
static const MeminfoRecord fields_array[] = {
{ "MemTotal", "MemTotal" }, // SPECIAL CASE: total system memory
{ "MemFree", "MemFree" },
{ "Buffers", "Buffers" },
{ "Cached", "Cached" },
// { "SwapCached", "SwapCached" },
{ "Active", "Active" },
{ "Inactive", "Inactive" },
{ "ActiveAnon", "Active(anon)" },
{ "InactiveAnon", "Inactive(anon)" },
{ "ActiveFile" , "Active(file)" },
{ "InactiveFile", "Inactive(file)" },
{ "Unevictable", "Unevictable", kMeminfoOp_HistLog },
// { "Mlocked", "Mlocked" },
{ "SwapTotal", "SwapTotal", kMeminfoOp_SwapTotal },
{ "SwapFree", "SwapFree", kMeminfoOp_SwapFree },
// { "Dirty", "Dirty" },
// { "Writeback", "Writeback" },
{ "AnonPages", "AnonPages" },
{ "Mapped", "Mapped" },
{ "Shmem", "Shmem", kMeminfoOp_HistLog },
{ "Slab", "Slab", kMeminfoOp_HistLog },
// { "SReclaimable", "SReclaimable" },
// { "SUnreclaim", "SUnreclaim" },
};
vector<MeminfoRecord> fields(fields_array,
fields_array + arraysize(fields_array));
if (!FillMeminfo(meminfo_raw, &fields)) {
return false;
}
int total_memory = fields[0].value;
if (total_memory == 0) {
// this "cannot happen"
LOG(WARNING) << "borked meminfo parser";
return false;
}
int swap_total = 0;
int swap_free = 0;
// Send all fields retrieved, except total memory.
for (unsigned int i = 1; i < fields.size(); i++) {
string metrics_name = base::StringPrintf("Platform.Meminfo%s",
fields[i].name);
int percent;
switch (fields[i].op) {
case kMeminfoOp_HistPercent:
// report value as percent of total memory
percent = fields[i].value * 100 / total_memory;
SendLinearSample(metrics_name, percent, 100, 101);
break;
case kMeminfoOp_HistLog:
// report value in kbytes, log scale, 4Gb max
SendSample(metrics_name, fields[i].value, 1, 4 * 1000 * 1000, 100);
break;
case kMeminfoOp_SwapTotal:
swap_total = fields[i].value;
case kMeminfoOp_SwapFree:
swap_free = fields[i].value;
break;
}
}
if (swap_total > 0) {
int swap_used = swap_total - swap_free;
int swap_used_percent = swap_used * 100 / swap_total;
SendSample("Platform.MeminfoSwapUsed", swap_used, 1, 8 * 1000 * 1000, 100);
SendLinearSample("Platform.MeminfoSwapUsed.Percent", swap_used_percent,
100, 101);
}
return true;
}
bool MetricsDaemon::FillMeminfo(const string& meminfo_raw,
vector<MeminfoRecord>* fields) {
vector<string> lines;
unsigned int nlines = Tokenize(meminfo_raw, "\n", &lines);
// Scan meminfo output and collect field values. Each field name has to
// match a meminfo entry (case insensitive) after removing non-alpha
// characters from the entry.
unsigned int ifield = 0;
for (unsigned int iline = 0;
iline < nlines && ifield < fields->size();
iline++) {
vector<string> tokens;
Tokenize(lines[iline], ": ", &tokens);
if (strcmp((*fields)[ifield].match, tokens[0].c_str()) == 0) {
// Name matches. Parse value and save.
if (!base::StringToInt(tokens[1], &(*fields)[ifield].value)) {
LOG(WARNING) << "Cound not convert " << tokens[1] << " to int";
return false;
}
ifield++;
}
}
if (ifield < fields->size()) {
// End of input reached while scanning.
LOG(WARNING) << "cannot find field " << (*fields)[ifield].match
<< " and following";
return false;
}
return true;
}
void MetricsDaemon::ScheduleMemuseCallback(double interval) {
if (testing_) {
return;
}
base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&MetricsDaemon::MemuseCallback, base::Unretained(this)),
base::TimeDelta::FromSeconds(interval));
}
void MetricsDaemon::MemuseCallback() {
// Since we only care about active time (i.e. uptime minus sleep time) but
// the callbacks are driven by real time (uptime), we check if we should
// reschedule this callback due to intervening sleep periods.
double now = GetActiveTime();
// Avoid intervals of less than one second.
double remaining_time = ceil(memuse_final_time_ - now);
if (remaining_time > 0) {
ScheduleMemuseCallback(remaining_time);
} else {
// Report stats and advance the measurement interval unless there are
// errors or we've completed the last interval.
if (MemuseCallbackWork() &&
memuse_interval_index_ < arraysize(kMemuseIntervals)) {
double interval = kMemuseIntervals[memuse_interval_index_++];
memuse_final_time_ = now + interval;
ScheduleMemuseCallback(interval);
}
}
}
bool MetricsDaemon::MemuseCallbackWork() {
string meminfo_raw;
const FilePath meminfo_path(kMeminfoFileName);
if (!base::ReadFileToString(meminfo_path, &meminfo_raw)) {
LOG(WARNING) << "cannot read " << meminfo_path.value().c_str();
return false;
}
return ProcessMemuse(meminfo_raw);
}
bool MetricsDaemon::ProcessMemuse(const string& meminfo_raw) {
static const MeminfoRecord fields_array[] = {
{ "MemTotal", "MemTotal" }, // SPECIAL CASE: total system memory
{ "ActiveAnon", "Active(anon)" },
{ "InactiveAnon", "Inactive(anon)" },
};
vector<MeminfoRecord> fields(fields_array,
fields_array + arraysize(fields_array));
if (!FillMeminfo(meminfo_raw, &fields)) {
return false;
}
int total = fields[0].value;
int active_anon = fields[1].value;
int inactive_anon = fields[2].value;
if (total == 0) {
// this "cannot happen"
LOG(WARNING) << "borked meminfo parser";
return false;
}
string metrics_name = base::StringPrintf("Platform.MemuseAnon%d",
memuse_interval_index_);
SendLinearSample(metrics_name, (active_anon + inactive_anon) * 100 / total,
100, 101);
return true;
}
void MetricsDaemon::SendSample(const string& name, int sample,
int min, int max, int nbuckets) {
metrics_lib_->SendToUMA(name, sample, min, max, nbuckets);
}
void MetricsDaemon::SendKernelCrashesCumulativeCountStats() {
// Report the number of crashes for this OS version, but don't clear the
// counter. It is cleared elsewhere on version change.
int64_t crashes_count = kernel_crashes_version_count_->Get();
SendSample(kernel_crashes_version_count_->Name(),
crashes_count,
1, // value of first bucket
500, // value of last bucket
100); // number of buckets
int64_t cpu_use_ms = version_cumulative_cpu_use_->Get();
SendSample(version_cumulative_cpu_use_->Name(),
cpu_use_ms / 1000, // stat is in seconds
1, // device may be used very little...
8 * 1000 * 1000, // ... or a lot (a little over 90 days)
100);
// On the first run after an autoupdate, cpu_use_ms and active_use_seconds
// can be zero. Avoid division by zero.
if (cpu_use_ms > 0) {
// Send the crash frequency since update in number of crashes per CPU year.
SendSample("Logging.KernelCrashesPerCpuYear",
crashes_count * kSecondsPerDay * 365 * 1000 / cpu_use_ms,
1,
1000 * 1000, // about one crash every 30s of CPU time
100);
}
int64_t active_use_seconds = version_cumulative_active_use_->Get();
if (active_use_seconds > 0) {
SendSample(version_cumulative_active_use_->Name(),
active_use_seconds,
1, // device may be used very little...
8 * 1000 * 1000, // ... or a lot (about 90 days)
100);
// Same as above, but per year of active time.
SendSample("Logging.KernelCrashesPerActiveYear",
crashes_count * kSecondsPerDay * 365 / active_use_seconds,
1,
1000 * 1000, // about one crash every 30s of active time
100);
}
}
void MetricsDaemon::SendAndResetDailyUseSample(
const scoped_ptr<PersistentInteger>& use) {
SendSample(use->Name(),
use->GetAndClear(),
1, // value of first bucket
kSecondsPerDay, // value of last bucket
50); // number of buckets
}
void MetricsDaemon::SendAndResetCrashIntervalSample(
const scoped_ptr<PersistentInteger>& interval) {
SendSample(interval->Name(),
interval->GetAndClear(),
1, // value of first bucket
4 * kSecondsPerWeek, // value of last bucket
50); // number of buckets
}
void MetricsDaemon::SendAndResetCrashFrequencySample(
const scoped_ptr<PersistentInteger>& frequency) {
SendSample(frequency->Name(),
frequency->GetAndClear(),
1, // value of first bucket
100, // value of last bucket
50); // number of buckets
}
void MetricsDaemon::SendLinearSample(const string& name, int sample,
int max, int nbuckets) {
// TODO(semenzato): add a proper linear histogram to the Chrome external
// metrics API.
LOG_IF(FATAL, nbuckets != max + 1) << "unsupported histogram scale";
metrics_lib_->SendEnumToUMA(name, sample, max);
}
void MetricsDaemon::UpdateStats(TimeTicks now_ticks,
Time now_wall_time) {
const int elapsed_seconds = (now_ticks - last_update_stats_time_).InSeconds();
daily_active_use_->Add(elapsed_seconds);
version_cumulative_active_use_->Add(elapsed_seconds);
user_crash_interval_->Add(elapsed_seconds);
kernel_crash_interval_->Add(elapsed_seconds);
TimeDelta cpu_use = cpu_usage_collector_->GetCumulativeCpuUse();
version_cumulative_cpu_use_->Add(
(cpu_use - latest_cpu_use_microseconds_).InMilliseconds());
latest_cpu_use_microseconds_ = cpu_use;
last_update_stats_time_ = now_ticks;
const TimeDelta since_epoch = now_wall_time - Time::UnixEpoch();
const int day = since_epoch.InDays();
const int week = day / 7;
if (daily_cycle_->Get() != day) {
daily_cycle_->Set(day);
SendAndResetDailyUseSample(daily_active_use_);
SendAndResetCrashFrequencySample(any_crashes_daily_count_);
SendAndResetCrashFrequencySample(user_crashes_daily_count_);
SendAndResetCrashFrequencySample(kernel_crashes_daily_count_);
SendAndResetCrashFrequencySample(unclean_shutdowns_daily_count_);
SendKernelCrashesCumulativeCountStats();
}
if (weekly_cycle_->Get() != week) {
weekly_cycle_->Set(week);
SendAndResetCrashFrequencySample(any_crashes_weekly_count_);
SendAndResetCrashFrequencySample(user_crashes_weekly_count_);
SendAndResetCrashFrequencySample(kernel_crashes_weekly_count_);
SendAndResetCrashFrequencySample(unclean_shutdowns_weekly_count_);
}
}
void MetricsDaemon::HandleUpdateStatsTimeout() {
UpdateStats(TimeTicks::Now(), Time::Now());
base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&MetricsDaemon::HandleUpdateStatsTimeout,
base::Unretained(this)),
base::TimeDelta::FromMilliseconds(kUpdateStatsIntervalMs));
}
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