| // Copyright 2014 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 "chromecast/browser/metrics/external_metrics.h" |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/bind.h" |
| #include "base/files/file_path.h" |
| #include "base/files/file_util.h" |
| #include "base/metrics/histogram.h" |
| #include "base/metrics/sparse_histogram.h" |
| #include "base/metrics/statistics_recorder.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/task/post_task.h" |
| #include "base/task/task_traits.h" |
| #include "base/threading/scoped_blocking_call.h" |
| #include "chromecast/base/metrics/cast_histograms.h" |
| #include "chromecast/base/metrics/cast_metrics_helper.h" |
| #include "chromecast/browser/metrics/cast_stability_metrics_provider.h" |
| #include "components/metrics/metrics_service.h" |
| #include "components/metrics/serialization/metric_sample.h" |
| #include "components/metrics/serialization/serialization_utils.h" |
| #include "content/public/browser/browser_task_traits.h" |
| #include "content/public/browser/browser_thread.h" |
| |
| namespace chromecast { |
| namespace metrics { |
| |
| namespace { |
| |
| bool CheckValues(const std::string& name, |
| int minimum, |
| int maximum, |
| uint32_t bucket_count) { |
| if (!base::Histogram::InspectConstructionArguments( |
| name, &minimum, &maximum, &bucket_count)) |
| return false; |
| base::HistogramBase* histogram = |
| base::StatisticsRecorder::FindHistogram(name); |
| if (!histogram) |
| return true; |
| return histogram->HasConstructionArguments(minimum, maximum, bucket_count); |
| } |
| |
| bool CheckLinearValues(const std::string& name, int maximum) { |
| return CheckValues(name, 1, maximum, maximum + 1); |
| } |
| |
| // Returns a task runner appropriate for running background tasks that perform |
| // file I/O. |
| scoped_refptr<base::SequencedTaskRunner> CreateTaskRunner() { |
| // Note that CollectEvents accesses a global singleton, and thus |
| // scheduling with CONTINUE_ON_SHUTDOWN might not be safe. |
| return base::CreateSequencedTaskRunnerWithTraits( |
| {base::MayBlock(), base::TaskPriority::BEST_EFFORT, |
| base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}); |
| } |
| |
| } // namespace |
| |
| // The interval between external metrics collections in seconds |
| static const int kExternalMetricsCollectionIntervalSeconds = 30; |
| |
| ExternalMetrics::ExternalMetrics( |
| CastStabilityMetricsProvider* stability_provider, |
| const std::string& uma_events_file) |
| : stability_provider_(stability_provider), |
| uma_events_file_(uma_events_file), |
| task_runner_(CreateTaskRunner()), |
| weak_factory_(this) { |
| DCHECK(stability_provider); |
| |
| // The sequence checker verifies that all of the interesting work done by this |
| // class is done on the |task_runner_|, rather than on the sequence that this |
| // object was created on. |
| DETACH_FROM_SEQUENCE(sequence_checker_); |
| } |
| |
| ExternalMetrics::~ExternalMetrics() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| } |
| |
| void ExternalMetrics::StopAndDestroy() { |
| task_runner_->DeleteSoon(FROM_HERE, this); |
| } |
| |
| void ExternalMetrics::Start() { |
| ScheduleCollection(); |
| } |
| |
| void ExternalMetrics::ProcessExternalEvents(const base::Closure& cb) { |
| task_runner_->PostTaskAndReply( |
| FROM_HERE, |
| base::BindOnce(base::IgnoreResult(&ExternalMetrics::CollectEvents), |
| weak_factory_.GetWeakPtr()), |
| cb); |
| } |
| |
| void ExternalMetrics::RecordCrash(const std::string& crash_kind) { |
| base::PostTaskWithTraits( |
| FROM_HERE, {content::BrowserThread::UI}, |
| base::BindOnce(&CastStabilityMetricsProvider::LogExternalCrash, |
| base::Unretained(stability_provider_), crash_kind)); |
| } |
| |
| void ExternalMetrics::RecordSparseHistogram( |
| const ::metrics::MetricSample& sample) { |
| CHECK_EQ(::metrics::MetricSample::SPARSE_HISTOGRAM, sample.type()); |
| base::HistogramBase* counter = base::SparseHistogram::FactoryGet( |
| sample.name(), base::HistogramBase::kUmaTargetedHistogramFlag); |
| counter->Add(sample.sample()); |
| } |
| |
| int ExternalMetrics::CollectEvents() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| base::ScopedBlockingCall scoped_blocking_call(base::BlockingType::WILL_BLOCK); |
| |
| std::vector<std::unique_ptr<::metrics::MetricSample>> samples; |
| ::metrics::SerializationUtils::ReadAndTruncateMetricsFromFile( |
| uma_events_file_, &samples); |
| |
| for (auto it = samples.begin(); it != samples.end(); ++it) { |
| const ::metrics::MetricSample& sample = **it; |
| |
| switch (sample.type()) { |
| case ::metrics::MetricSample::CRASH: |
| RecordCrash(sample.name()); |
| break; |
| case ::metrics::MetricSample::USER_ACTION: |
| CastMetricsHelper::GetInstance()->RecordSimpleAction(sample.name()); |
| break; |
| case ::metrics::MetricSample::HISTOGRAM: |
| if (!CheckValues(sample.name(), sample.min(), sample.max(), |
| sample.bucket_count())) { |
| DLOG(ERROR) << "Invalid histogram: " << sample.name(); |
| break; |
| } |
| UMA_HISTOGRAM_CUSTOM_COUNTS_NO_CACHE(sample.name(), |
| sample.sample(), |
| sample.min(), |
| sample.max(), |
| sample.bucket_count(), |
| 1); |
| break; |
| case ::metrics::MetricSample::LINEAR_HISTOGRAM: |
| if (!CheckLinearValues(sample.name(), sample.max())) { |
| DLOG(ERROR) << "Invalid linear histogram: " << sample.name(); |
| break; |
| } |
| UMA_HISTOGRAM_ENUMERATION_NO_CACHE( |
| sample.name(), sample.sample(), sample.max()); |
| break; |
| case ::metrics::MetricSample::SPARSE_HISTOGRAM: |
| RecordSparseHistogram(sample); |
| break; |
| } |
| } |
| |
| return samples.size(); |
| } |
| |
| void ExternalMetrics::CollectEventsAndReschedule() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| CollectEvents(); |
| ScheduleCollection(); |
| } |
| |
| void ExternalMetrics::ScheduleCollection() { |
| task_runner_->PostDelayedTask( |
| FROM_HERE, |
| base::BindOnce(&ExternalMetrics::CollectEventsAndReschedule, |
| weak_factory_.GetWeakPtr()), |
| base::TimeDelta::FromSeconds(kExternalMetricsCollectionIntervalSeconds)); |
| } |
| |
| } // namespace metrics |
| } // namespace chromecast |