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// Copyright 2023 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/test_support/resource_attribution/measurement_delegates.h"
#include <map>
#include <utility>
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "components/performance_manager/public/graph/process_node.h"
#include "content/public/common/process_type.h"
namespace resource_attribution {
using Graph = performance_manager::Graph;
using ProcessNode = performance_manager::ProcessNode;
SimulatedCPUMeasurementDelegateFactory::
SimulatedCPUMeasurementDelegateFactory() = default;
SimulatedCPUMeasurementDelegateFactory::
~SimulatedCPUMeasurementDelegateFactory() {
// Delete all delegates that are still owned by the factory.
pending_cpu_delegates_.clear();
// Now all delegates, owned and un-owned, should have been deleted.
CHECK(simulated_cpu_delegates_.empty());
}
void SimulatedCPUMeasurementDelegateFactory::SetDefaultCPUUsage(
SimulatedCPUUsage default_cpu_usage) {
default_cpu_usage_ = default_cpu_usage;
}
void SimulatedCPUMeasurementDelegateFactory::SetRequireValidProcesses(
bool require_valid) {
require_valid_processes_ = require_valid;
}
SimulatedCPUMeasurementDelegate&
SimulatedCPUMeasurementDelegateFactory::GetDelegate(
const ProcessNode* process_node) {
// If a delegate already exists, use it.
auto it = simulated_cpu_delegates_.find(process_node);
if (it != simulated_cpu_delegates_.end()) {
return *(it->second);
}
// Create a new delegate, saving it in `pending_cpu_delegates_` until someone
// calls CreateDelegateForProcess().
auto new_delegate = std::make_unique<SimulatedCPUMeasurementDelegate>(
PassKey(), weak_factory_.GetSafeRef(), default_cpu_usage_);
auto* delegate_ptr = new_delegate.get();
simulated_cpu_delegates_.emplace(process_node, delegate_ptr);
const auto [_, inserted] =
pending_cpu_delegates_.emplace(process_node, std::move(new_delegate));
CHECK(inserted);
return *delegate_ptr;
}
bool SimulatedCPUMeasurementDelegateFactory::ShouldMeasureProcess(
const ProcessNode* process_node) {
if (require_valid_processes_) {
return CPUMeasurementDelegate::Factory::ProcessNodeHasRunningProcess(
process_node);
}
return true;
}
std::unique_ptr<CPUMeasurementDelegate>
SimulatedCPUMeasurementDelegateFactory::CreateDelegateForProcess(
const ProcessNode* process_node) {
// If there was a delegate already created, use it.
auto it = pending_cpu_delegates_.find(process_node);
if (it != pending_cpu_delegates_.end()) {
auto delegate = std::move(it->second);
pending_cpu_delegates_.erase(it);
CHECK_EQ(simulated_cpu_delegates_.at(process_node), delegate.get());
return delegate;
}
// Create a new delegate.
auto new_delegate = std::make_unique<SimulatedCPUMeasurementDelegate>(
PassKey(), weak_factory_.GetSafeRef(), default_cpu_usage_);
auto* delegate_ptr = new_delegate.get();
simulated_cpu_delegates_.emplace(process_node, delegate_ptr);
return new_delegate;
}
void SimulatedCPUMeasurementDelegateFactory::OnDelegateDeleted(
base::PassKey<SimulatedCPUMeasurementDelegate>,
SimulatedCPUMeasurementDelegate* delegate) {
const size_t erased = std::erase_if(
simulated_cpu_delegates_,
[delegate](const auto& entry) { return delegate == entry.second; });
CHECK_EQ(erased, 1U);
}
SimulatedCPUMeasurementDelegate::SimulatedCPUMeasurementDelegate(
base::PassKey<SimulatedCPUMeasurementDelegateFactory>,
base::SafeRef<SimulatedCPUMeasurementDelegateFactory> factory,
SimulatedCPUUsage initial_usage)
: factory_(factory) {
SetCPUUsage(initial_usage);
}
SimulatedCPUMeasurementDelegate::~SimulatedCPUMeasurementDelegate() {
factory_->OnDelegateDeleted(PassKey(), this);
}
void SimulatedCPUMeasurementDelegate::SetCPUUsage(SimulatedCPUUsage usage,
base::TimeTicks start_time) {
if (!cpu_usage_periods_.empty()) {
cpu_usage_periods_.back().end_time = start_time;
}
cpu_usage_periods_.push_back(CPUUsagePeriod{
.start_time = start_time,
.cpu_usage = usage,
});
}
base::expected<base::TimeDelta, CPUMeasurementDelegate::ProcessCPUUsageError>
SimulatedCPUMeasurementDelegate::GetCumulativeCPUUsage() {
if (error_.has_value()) {
return base::unexpected(error_.value());
}
base::TimeDelta cumulative_usage;
for (const auto& usage_period : cpu_usage_periods_) {
CHECK(!usage_period.start_time.is_null());
// The last interval in the list will have no end time.
const base::TimeTicks end_time = usage_period.end_time.is_null()
? base::TimeTicks::Now()
: usage_period.end_time;
CHECK_GE(end_time, usage_period.start_time);
cumulative_usage +=
(end_time - usage_period.start_time) * usage_period.cpu_usage;
}
return base::ok(cumulative_usage);
}
FakeMemoryMeasurementDelegateFactory::FakeMemoryMeasurementDelegateFactory() =
default;
FakeMemoryMeasurementDelegateFactory::~FakeMemoryMeasurementDelegateFactory() =
default;
std::unique_ptr<MemoryMeasurementDelegate>
FakeMemoryMeasurementDelegateFactory::CreateDelegate(Graph*) {
return std::make_unique<FakeMemoryMeasurementDelegate>(
PassKey(), weak_factory_.GetSafeRef());
}
FakeMemoryMeasurementDelegate::FakeMemoryMeasurementDelegate(
base::PassKey<FakeMemoryMeasurementDelegateFactory>,
base::SafeRef<FakeMemoryMeasurementDelegateFactory> factory)
: factory_(factory) {}
FakeMemoryMeasurementDelegate::~FakeMemoryMeasurementDelegate() = default;
void FakeMemoryMeasurementDelegate::RequestMemorySummary(
base::OnceCallback<void(MemorySummaryMap)> callback) {
std::move(callback).Run(factory_->memory_summaries());
}
} // namespace resource_attribution
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