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/*
* Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/test/metrics/metrics_accumulator.h"
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/numerics/samples_stats_counter.h"
#include "api/test/metrics/metric.h"
#include "api/units/timestamp.h"
#include "rtc_base/synchronization/mutex.h"
namespace webrtc {
namespace test {
namespace {
Metric::Stats ToStats(const SamplesStatsCounter& values) {
if (values.IsEmpty()) {
return Metric::Stats();
}
return Metric::Stats{.mean = values.GetAverage(),
.stddev = values.GetStandardDeviation(),
.min = values.GetMin(),
.max = values.GetMax()};
}
Metric SetTimeseries(const Metric& prototype,
const SamplesStatsCounter& counter) {
Metric output(prototype);
Metric::TimeSeries time_series;
for (const SamplesStatsCounter::StatsSample& sample :
counter.GetTimedSamples()) {
time_series.samples.push_back(
Metric::TimeSeries::Sample{.timestamp = sample.time,
.value = sample.value,
.sample_metadata = sample.metadata});
}
output.time_series = std::move(time_series);
output.stats = ToStats(counter);
return output;
}
} // namespace
bool operator<(const MetricsAccumulator::MetricKey& a,
const MetricsAccumulator::MetricKey& b) {
if (a.test_case_name < b.test_case_name) {
return true;
} else if (a.test_case_name > b.test_case_name) {
return false;
} else {
return a.metric_name < b.metric_name;
}
}
bool MetricsAccumulator::AddSample(
absl::string_view metric_name,
absl::string_view test_case_name,
double value,
Timestamp timestamp,
std::map<std::string, std::string> point_metadata) {
MutexLock lock(&mutex_);
bool created;
MetricValue* metric_value =
GetOrCreateMetric(metric_name, test_case_name, &created);
metric_value->counter.AddSample(
SamplesStatsCounter::StatsSample{.value = value,
.time = timestamp,
.metadata = std::move(point_metadata)});
return created;
}
bool MetricsAccumulator::AddMetricMetadata(
absl::string_view metric_name,
absl::string_view test_case_name,
Unit unit,
ImprovementDirection improvement_direction,
std::map<std::string, std::string> metric_metadata) {
MutexLock lock(&mutex_);
bool created;
MetricValue* metric_value =
GetOrCreateMetric(metric_name, test_case_name, &created);
metric_value->metric.unit = unit;
metric_value->metric.improvement_direction = improvement_direction;
metric_value->metric.metric_metadata = std::move(metric_metadata);
return created;
}
std::vector<Metric> MetricsAccumulator::GetCollectedMetrics() const {
MutexLock lock(&mutex_);
std::vector<Metric> out;
out.reserve(metrics_.size());
for (const auto& [unused_key, metric_value] : metrics_) {
out.push_back(SetTimeseries(metric_value.metric, metric_value.counter));
}
return out;
}
MetricsAccumulator::MetricValue* MetricsAccumulator::GetOrCreateMetric(
absl::string_view metric_name,
absl::string_view test_case_name,
bool* created) {
MetricKey key(metric_name, test_case_name);
auto it = metrics_.find(key);
if (it != metrics_.end()) {
*created = false;
return &it->second;
}
*created = true;
Metric metric{
.name = key.metric_name,
.unit = Unit::kUnitless,
.improvement_direction = ImprovementDirection::kNeitherIsBetter,
.test_case = key.test_case_name,
};
return &metrics_.emplace(key, MetricValue{.metric = std::move(metric)})
.first->second;
}
} // namespace test
} // namespace webrtc
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