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// Copyright 2022 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/user_tuning_utils.h"
#include <optional>
#include "base/check.h"
#include "base/feature_list.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "build/buildflag.h"
#include "chrome/browser/performance_manager/policies/page_discarding_helper.h"
#include "chrome/browser/performance_manager/public/user_tuning/battery_saver_mode_manager.h"
#include "chrome/browser/performance_manager/public/user_tuning/user_performance_tuning_manager.h"
#include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom.h"
#include "components/performance_manager/public/features.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"
#if !BUILDFLAG(IS_ANDROID)
#include <algorithm>
#include <string>
#include <vector>
#include "chrome/browser/performance_manager/policies/cannot_discard_reason.h"
#include "chrome/browser/performance_manager/policies/page_discarding_helper.h"
#endif
#if BUILDFLAG(IS_CHROMEOS)
#include "ash/constants/ash_features.h"
#endif
namespace performance_manager::user_tuning {
bool IsRefreshRateThrottled() {
#if BUILDFLAG(IS_ANDROID)
return false;
#else
// This can be false in unit tests.
if (!BatterySaverModeManager::HasInstance()) {
return false;
}
return BatterySaverModeManager::GetInstance()->IsBatterySaverActive();
#endif
}
bool IsBatterySaverModeManagedByOS() {
#if BUILDFLAG(IS_CHROMEOS)
return ash::features::IsBatterySaverAvailable();
#else
return false;
#endif
}
uint64_t GetDiscardedMemoryEstimateForPage(const PageNode* node) {
DCHECK_ON_GRAPH_SEQUENCE(node->GetGraph());
return node->EstimatePrivateFootprintSize();
}
std::vector<std::string> GetCannotDiscardReasonsForPageNode(
const PageNode* page_node) {
#if BUILDFLAG(IS_ANDROID)
// TODO(crbug.com/399740817): Enable PageDiscardingHelper after
// WebContentsDiscard launch.
return {"not implemented"};
#else
auto* discarding_helper = policies::DiscardEligibilityPolicy::GetFromGraph(
PerformanceManager::GetGraph());
CHECK(discarding_helper);
CHECK(page_node);
std::vector<policies::CannotDiscardReason> cannot_discard_reasons;
discarding_helper->CanDiscard(
page_node, policies::DiscardEligibilityPolicy::DiscardReason::PROACTIVE,
policies::kNonVisiblePagesUrgentProtectionTime, &cannot_discard_reasons);
std::vector<std::string> results;
results.reserve(cannot_discard_reasons.size()); // Reserve space
std::transform(cannot_discard_reasons.begin(), cannot_discard_reasons.end(),
std::back_inserter(results),
policies::CannotDiscardReasonToString);
return results;
#endif
}
void DiscardPage(const PageNode* page_node,
::mojom::LifecycleUnitDiscardReason reason,
bool ignore_minimum_time_in_background) {
#if !BUILDFLAG(IS_ANDROID)
auto* discarding_helper = policies::PageDiscardingHelper::GetFromGraph(
PerformanceManager::GetGraph());
CHECK(discarding_helper);
CHECK(page_node);
discarding_helper->ImmediatelyDiscardMultiplePages(
{page_node}, reason,
ignore_minimum_time_in_background
? base::TimeDelta()
: policies::kNonVisiblePagesUrgentProtectionTime);
#endif
}
void DiscardAnyPage(::mojom::LifecycleUnitDiscardReason reason,
bool ignore_minimum_time_in_background) {
#if !BUILDFLAG(IS_ANDROID)
auto* discarding_helper = policies::PageDiscardingHelper::GetFromGraph(
PerformanceManager::GetGraph());
CHECK(discarding_helper);
discarding_helper->DiscardAPage(
reason, ignore_minimum_time_in_background
? base::TimeDelta()
: policies::kNonVisiblePagesUrgentProtectionTime);
#endif
}
} // namespace performance_manager::user_tuning
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