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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/resource_attribution/cpu_measurement_data.h"
#include <memory>
#include <optional>
#include <utility>
#include "base/memory/scoped_refptr.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "base/types/optional_util.h"
#include "base/values.h"
#include "components/performance_manager/public/graph/node_data_describer_util.h"
#include "components/performance_manager/public/resource_attribution/cpu_measurement_delegate.h"
#include "components/performance_manager/public/resource_attribution/query_results.h"
#include "components/performance_manager/resource_attribution/cpu_measurement_monitor.h"
#include "components/performance_manager/resource_attribution/node_data_describers.h"
namespace resource_attribution {
CPUMeasurementData::CPUMeasurementData(
std::unique_ptr<CPUMeasurementDelegate> delegate)
: delegate_(std::move(delegate)),
// Record the CPU usage immediately on starting to measure a process, so
// the first call to CPUMeasurementMonitor::MeasureAndDistributeCPUUsage()
// will cover the time between the measurement starting and the snapshot.
most_recent_measurement_(
base::OptionalFromExpected(delegate_->GetCumulativeCPUUsage())),
last_measurement_time_(base::TimeTicks::Now()) {}
CPUMeasurementData::~CPUMeasurementData() = default;
CPUMeasurementData::CPUMeasurementData(CPUMeasurementData&&) = default;
CPUMeasurementData& CPUMeasurementData::operator=(CPUMeasurementData&&) =
default;
void CPUMeasurementData::SetMostRecentMeasurement(
base::TimeDelta measurement,
base::TimeTicks measurement_time) {
most_recent_measurement_ = measurement;
last_measurement_time_ = measurement_time;
}
SharedCPUTimeResultData::SharedCPUTimeResultData() = default;
SharedCPUTimeResultData::~SharedCPUTimeResultData() = default;
SharedCPUTimeResultData::SharedCPUTimeResultData(SharedCPUTimeResultData&&) =
default;
SharedCPUTimeResultData& SharedCPUTimeResultData::operator=(
SharedCPUTimeResultData&&) = default;
base::Value::Dict SharedCPUTimeResultData::Describe() const {
base::Value::Dict dict;
if (result_ptr) {
const CPUTimeResult& result = result_ptr->result();
const base::TimeDelta measurement_interval =
result.metadata.measurement_time - result.start_time;
dict.Merge(DescribeResultMetadata(result.metadata));
dict.Set("measurement_interval",
performance_manager::TimeDeltaToValue(measurement_interval));
dict.Set("cumulative_cpu",
performance_manager::TimeDeltaToValue(result.cumulative_cpu));
dict.Set("cumulative_background_cpu",
performance_manager::TimeDeltaToValue(
result.cumulative_background_cpu));
}
return dict;
}
} // namespace resource_attribution
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