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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/memory/enterprise_memory_limit_evaluator.h"
#include "base/functional/bind.h"
#include "base/task/sequenced_task_runner.h"
#include "components/performance_manager/public/decorators/process_metrics_decorator.h"
#include "components/performance_manager/public/graph/process_node.h"
#include "components/performance_manager/public/performance_manager.h"
namespace memory {
EnterpriseMemoryLimitEvaluator::EnterpriseMemoryLimitEvaluator(
std::unique_ptr<memory_pressure::MemoryPressureVoter> voter)
: voter_(std::move(voter)), weak_ptr_factory_(this) {}
EnterpriseMemoryLimitEvaluator::~EnterpriseMemoryLimitEvaluator() {
DCHECK(!observer_);
}
void EnterpriseMemoryLimitEvaluator::Start() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!observer_);
auto observer =
std::make_unique<EnterpriseMemoryLimitEvaluator::GraphObserver>(
base::BindRepeating(
&EnterpriseMemoryLimitEvaluator::OnTotalResidentSetKbSample,
weak_ptr_factory_.GetWeakPtr()),
base::SequencedTaskRunner::GetCurrentDefault());
observer_ = observer.get();
performance_manager::PerformanceManager::GetGraph()->PassToGraph(
std::move(observer));
}
std::unique_ptr<EnterpriseMemoryLimitEvaluator::GraphObserver>
EnterpriseMemoryLimitEvaluator::StartForTesting() {
DCHECK(!observer_);
auto observer =
std::make_unique<EnterpriseMemoryLimitEvaluator::GraphObserver>(
base::BindRepeating(
&EnterpriseMemoryLimitEvaluator::OnTotalResidentSetKbSample,
weak_ptr_factory_.GetWeakPtr()),
base::SequencedTaskRunner::GetCurrentDefault());
observer_ = observer.get();
return observer;
}
void EnterpriseMemoryLimitEvaluator::Stop() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(observer_);
// Start by invalidating all the WeakPtrs that have been served, this will
// invalidate the callback owned by the observer.
weak_ptr_factory_.InvalidateWeakPtrs();
// This will destroy the observer since TakeFromGraph returns a unique_ptr.
performance_manager::PerformanceManager::GetGraph()->TakeFromGraph(observer_);
observer_ = nullptr;
}
void EnterpriseMemoryLimitEvaluator::StopForTesting() {
observer_ = nullptr;
}
void EnterpriseMemoryLimitEvaluator::OnTotalResidentSetKbSample(
uint64_t resident_set_sample_kb) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Limit is in mb, must convert to kb.
bool is_critical = resident_set_sample_kb > (resident_set_limit_mb_ * 1024);
voter_->SetVote(
is_critical ? base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL
: base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
/* notify_listeners = */ is_critical);
}
void EnterpriseMemoryLimitEvaluator::SetResidentSetLimitMb(
uint64_t resident_set_limit_mb) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
resident_set_limit_mb_ = resident_set_limit_mb;
}
bool EnterpriseMemoryLimitEvaluator::IsRunning() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return observer_ != nullptr;
}
EnterpriseMemoryLimitEvaluator::GraphObserver::GraphObserver(
base::RepeatingCallback<void(uint64_t)> on_sample_callback,
scoped_refptr<base::SequencedTaskRunner> task_runner)
: on_sample_callback_(std::move(on_sample_callback)),
task_runner_(task_runner) {}
EnterpriseMemoryLimitEvaluator::GraphObserver::~GraphObserver() = default;
void EnterpriseMemoryLimitEvaluator::GraphObserver::OnPassedToGraph(
performance_manager::Graph* graph) {
graph->AddSystemNodeObserver(this);
metrics_interest_token_ = performance_manager::ProcessMetricsDecorator::
RegisterInterestForProcessMetrics(graph);
}
void EnterpriseMemoryLimitEvaluator::GraphObserver::OnTakenFromGraph(
performance_manager::Graph* graph) {
graph->RemoveSystemNodeObserver(this);
metrics_interest_token_.reset();
}
void EnterpriseMemoryLimitEvaluator::GraphObserver::
OnProcessMemoryMetricsAvailable(
const performance_manager::SystemNode* system_node) {
uint64_t total_rss_kb = 0U;
for (const performance_manager::ProcessNode* process_node :
system_node->GetGraph()->GetAllProcessNodes()) {
total_rss_kb += process_node->GetResidentSetKb();
}
task_runner_->PostTask(
FROM_HERE, base::BindOnce(std::move(on_sample_callback_), total_rss_kb));
}
void EnterpriseMemoryLimitEvaluator::GraphObserver::
OnProcessMemoryMetricsAvailableForTesting(uint64_t total_rss_kb) {
on_sample_callback_.Run(total_rss_kb);
}
} // namespace memory
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