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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 "chrome/browser/performance_manager/public/user_tuning/performance_detection_manager.h"
#include <memory>
#include <optional>
#include <utility>
#include <vector>
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/task/bind_post_task.h"
#include "base/time/time.h"
#include "chrome/browser/performance_manager/policies/page_discarding_helper.h"
#include "chrome/browser/performance_manager/user_tuning/cpu_health_tracker.h"
#include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom-shared.h"
#include "chrome/browser/ui/performance_controls/performance_controls_metrics.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/public/graph/page_node.h"
#include "components/performance_manager/public/performance_manager.h"
#include "components/performance_manager/public/resource_attribution/page_context.h"
#include "content/public/browser/browser_thread.h"
namespace performance_manager::user_tuning {
namespace {
PerformanceDetectionManager* g_performance_detection_manager = nullptr;
} // namespace
void PerformanceDetectionManager::AddStatusObserver(
ResourceTypeSet resource_types,
StatusObserver* observer) {
for (auto resource_type : resource_types) {
status_observers_[resource_type].AddObserver(observer);
observer->OnStatusChanged(resource_type,
current_health_status_[resource_type],
!actionable_tabs_[resource_type].empty());
}
}
void PerformanceDetectionManager::RemoveStatusObserver(StatusObserver* o) {
for (auto& [resource_type, observer_list] : status_observers_) {
observer_list.RemoveObserver(o);
}
}
void PerformanceDetectionManager::AddActionableTabsObserver(
ResourceTypeSet resource_types,
ActionableTabsObserver* new_observer) {
for (auto resource_type : resource_types) {
actionable_tab_observers_[resource_type].AddObserver(new_observer);
new_observer->OnActionableTabListChanged(resource_type,
actionable_tabs_[resource_type]);
}
}
void PerformanceDetectionManager::RemoveActionableTabsObserver(
ActionableTabsObserver* o) {
for (auto& [resource_type, observer_list] : actionable_tab_observers_) {
observer_list.RemoveObserver(o);
}
}
bool PerformanceDetectionManager::DiscardTabs(
std::vector<resource_attribution::PageContext> tabs) {
Graph* graph = PerformanceManager::GetGraph();
std::vector<const PageNode*> eligible_nodes;
std::vector<resource_attribution::PageContext> eligible_page_contexts;
for (const resource_attribution::PageContext& context : tabs) {
const PageNode* page_node = context.GetPageNode();
if (page_node) {
eligible_nodes.emplace_back(page_node);
eligible_page_contexts.emplace_back(context);
}
}
performance_manager::user_tuning::CpuHealthTracker* const health_tracker =
performance_manager::user_tuning::CpuHealthTracker::GetFromGraph(graph);
RecordCpuUsageBeforeDiscard(
health_tracker->GetTotalCpuPercentUsage(eligible_page_contexts));
health_level_before_discard_ = health_tracker->GetCurrentHealthLevel();
policies::PageDiscardingHelper* const helper =
policies::PageDiscardingHelper::GetFromGraph(graph);
CHECK(helper);
const bool had_successful_discard = helper->ImmediatelyDiscardMultiplePages(
eligible_nodes, ::mojom::LifecycleUnitDiscardReason::SUGGESTED);
OnDiscardComplete();
return had_successful_discard;
}
void PerformanceDetectionManager::ForceTabCpuDataRefresh() {
Graph* graph = PerformanceManager::GetGraph();
CpuHealthTracker* const health_tracker =
CpuHealthTracker::GetFromGraph(graph);
health_tracker->QueryAndProcessTabActionability(std::nullopt);
}
void PerformanceDetectionManager::OnDiscardComplete() {
// base::Unretained(this) is safe here because the timers are owned by the
// PerformanceDetectionManager so the callback will not be invoked after this
// is destroyed.
// If a timer is still running and another discard occurs, we will restart the
// timer instead to record the health status after the most recent discard.
// This may cause different counts for the one, two, and four minute timers.
discard_timer_.Start(
FROM_HERE, base::Minutes(1),
base::BindRepeating(&PerformanceDetectionManager::RecordCpuHealthStatus,
base::Unretained(this), base::Minutes(1)));
}
void PerformanceDetectionManager::RecordCpuHealthStatus(
base::TimeDelta time_after_discard) {
if (time_after_discard == base::Minutes(1)) {
// Start the timer for another minute to record health status 2 minutes
// after discard
discard_timer_.Start(
FROM_HERE, base::Minutes(1),
base::BindRepeating(&PerformanceDetectionManager::RecordCpuHealthStatus,
base::Unretained(this), base::Minutes(2)));
} else if (time_after_discard == base::Minutes(2)) {
// Start the timer for another 2 minutes to record health status 4 minutes
// after discard
discard_timer_.Start(
FROM_HERE, base::Minutes(2),
base::BindRepeating(&PerformanceDetectionManager::RecordCpuHealthStatus,
base::Unretained(this), base::Minutes(4)));
}
Graph* const graph = PerformanceManager::GetGraph();
CpuHealthTracker* const health_tracker =
performance_manager::user_tuning::CpuHealthTracker::GetFromGraph(graph);
PerformanceDetectionManager::HealthLevel current_health_level =
health_tracker->GetCurrentHealthLevel();
CHECK(health_level_before_discard_.has_value());
RecordCpuHealthStatusChange(time_after_discard,
health_level_before_discard_.value(),
current_health_level);
RecordCpuHealthStatusAfterDiscard(time_after_discard, current_health_level);
}
void PerformanceDetectionManager::NotifyActionableTabObserversForTesting(
ResourceType resource_type,
const ActionableTabsResult& tabs) {
NotifyActionableTabObservers(resource_type, tabs);
}
// static
bool PerformanceDetectionManager::HasInstance() {
return g_performance_detection_manager;
}
// static
PerformanceDetectionManager* PerformanceDetectionManager::GetInstance() {
CHECK(g_performance_detection_manager);
return g_performance_detection_manager;
}
PerformanceDetectionManager::~PerformanceDetectionManager() {
CHECK_EQ(this, g_performance_detection_manager);
g_performance_detection_manager = nullptr;
}
PerformanceDetectionManager::PerformanceDetectionManager() {
CHECK(!g_performance_detection_manager);
g_performance_detection_manager = this;
const auto resource_types = ResourceTypeSet::All();
current_health_status_ = base::MakeFlatMap<ResourceType, HealthLevel>(
resource_types, {}, [](ResourceType type) {
return std::make_pair(type, HealthLevel::kHealthy);
});
actionable_tabs_ = base::MakeFlatMap<ResourceType, ActionableTabsResult>(
resource_types, {}, [](ResourceType type) {
return std::make_pair(type, ActionableTabsResult());
});
CpuHealthTracker::StatusChangeCallback on_status_change = base::BindPostTask(
content::GetUIThreadTaskRunner({}),
base::BindRepeating(&PerformanceDetectionManager::NotifyStatusObservers,
weak_ptr_factory_.GetWeakPtr()));
CpuHealthTracker::ActionableTabResultCallback on_actionable_list_change =
base::BindPostTask(
content::GetUIThreadTaskRunner({}),
base::BindRepeating(
&PerformanceDetectionManager::NotifyActionableTabObservers,
weak_ptr_factory_.GetWeakPtr()));
Graph* graph = PerformanceManager::GetGraph();
std::unique_ptr<CpuHealthTracker> cpu_health_tracker =
std::make_unique<CpuHealthTracker>(std::move(on_status_change),
std::move(on_actionable_list_change));
graph->PassToGraph(std::move(cpu_health_tracker));
}
void PerformanceDetectionManager::NotifyStatusObservers(
ResourceType resource_type,
HealthLevel new_level,
bool is_actionable) {
CHECK_CURRENTLY_ON(content::BrowserThread::UI);
auto& current_health = current_health_status_[resource_type];
CHECK_NE(current_health, new_level);
current_health = new_level;
for (auto& obs : status_observers_[resource_type]) {
obs.OnStatusChanged(resource_type, current_health_status_[resource_type],
is_actionable);
}
}
void PerformanceDetectionManager::NotifyActionableTabObservers(
ResourceType resource_type,
ActionableTabsResult tabs) {
CHECK_CURRENTLY_ON(content::BrowserThread::UI);
auto& actionable_tabs = actionable_tabs_[resource_type];
// It is possible for the same actionable tabs to be surfaced again while in
// demo mode.
if (!base::FeatureList::IsEnabled(
features::kPerformanceInterventionDemoMode)) {
CHECK(actionable_tabs != tabs);
}
actionable_tabs = tabs;
for (auto& obs : actionable_tab_observers_[resource_type]) {
obs.OnActionableTabListChanged(resource_type,
actionable_tabs_[resource_type]);
}
}
} // namespace performance_manager::user_tuning
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