| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/platform/scheduler/main_thread/frame_scheduler_impl.h" |
| |
| #include <memory> |
| #include "base/metrics/histogram_macros.h" |
| #include "base/trace_event/blame_context.h" |
| #include "third_party/blink/public/platform/blame_context.h" |
| #include "third_party/blink/public/platform/web_string.h" |
| #include "third_party/blink/renderer/platform/runtime_enabled_features.h" |
| #include "third_party/blink/renderer/platform/scheduler/base/real_time_domain.h" |
| #include "third_party/blink/renderer/platform/scheduler/base/virtual_time_domain.h" |
| #include "third_party/blink/renderer/platform/scheduler/child/default_params.h" |
| #include "third_party/blink/renderer/platform/scheduler/child/features.h" |
| #include "third_party/blink/renderer/platform/scheduler/child/page_visibility_state.h" |
| #include "third_party/blink/renderer/platform/scheduler/child/task_queue_with_task_type.h" |
| #include "third_party/blink/renderer/platform/scheduler/common/throttling/budget_pool.h" |
| #include "third_party/blink/renderer/platform/scheduler/main_thread/auto_advancing_virtual_time_domain.h" |
| #include "third_party/blink/renderer/platform/scheduler/main_thread/main_thread_scheduler_impl.h" |
| #include "third_party/blink/renderer/platform/scheduler/main_thread/page_scheduler_impl.h" |
| #include "third_party/blink/renderer/platform/scheduler/util/tracing_helper.h" |
| #include "third_party/blink/renderer/platform/scheduler/worker/worker_scheduler_proxy.h" |
| |
| namespace blink { |
| |
| namespace scheduler { |
| |
| using base::sequence_manager::TaskQueue; |
| |
| namespace { |
| |
| const char* VisibilityStateToString(bool is_visible) { |
| if (is_visible) { |
| return "visible"; |
| } else { |
| return "hidden"; |
| } |
| } |
| |
| const char* PausedStateToString(bool is_paused) { |
| if (is_paused) { |
| return "paused"; |
| } else { |
| return "running"; |
| } |
| } |
| |
| const char* FrozenStateToString(bool is_frozen) { |
| if (is_frozen) { |
| return "frozen"; |
| } else { |
| return "running"; |
| } |
| } |
| |
| const char* KeepActiveStateToString(bool keep_active) { |
| if (keep_active) { |
| return "keep_active"; |
| } else { |
| return "no_keep_active"; |
| } |
| } |
| |
| // Used to update the priority of task_queue. Note that this function is |
| // used for queues associated with a frame. |
| void UpdatePriority(MainThreadTaskQueue* task_queue) { |
| if (!task_queue) |
| return; |
| |
| FrameSchedulerImpl* frame_scheduler = task_queue->GetFrameScheduler(); |
| DCHECK(frame_scheduler); |
| task_queue->SetQueuePriority(frame_scheduler->ComputePriority(task_queue)); |
| } |
| |
| } // namespace |
| |
| FrameSchedulerImpl::ActiveConnectionHandleImpl::ActiveConnectionHandleImpl( |
| FrameSchedulerImpl* frame_scheduler) |
| : frame_scheduler_(frame_scheduler->GetWeakPtr()) { |
| frame_scheduler->DidOpenActiveConnection(); |
| } |
| |
| FrameSchedulerImpl::ActiveConnectionHandleImpl::~ActiveConnectionHandleImpl() { |
| if (frame_scheduler_) { |
| static_cast<FrameSchedulerImpl*>(frame_scheduler_.get()) |
| ->DidCloseActiveConnection(); |
| } |
| } |
| |
| FrameSchedulerImpl::PauseSubresourceLoadingHandleImpl:: |
| PauseSubresourceLoadingHandleImpl( |
| base::WeakPtr<FrameSchedulerImpl> frame_scheduler) |
| : frame_scheduler_(std::move(frame_scheduler)) { |
| DCHECK(frame_scheduler_); |
| frame_scheduler_->AddPauseSubresourceLoadingHandle(); |
| } |
| |
| FrameSchedulerImpl::PauseSubresourceLoadingHandleImpl:: |
| ~PauseSubresourceLoadingHandleImpl() { |
| if (frame_scheduler_) |
| frame_scheduler_->RemovePauseSubresourceLoadingHandle(); |
| } |
| |
| FrameSchedulerImpl::FrameSchedulerImpl( |
| MainThreadSchedulerImpl* main_thread_scheduler, |
| PageSchedulerImpl* parent_page_scheduler, |
| base::trace_event::BlameContext* blame_context, |
| FrameScheduler::FrameType frame_type) |
| : frame_type_(frame_type), |
| main_thread_scheduler_(main_thread_scheduler), |
| parent_page_scheduler_(parent_page_scheduler), |
| blame_context_(blame_context), |
| frame_visible_(true, |
| "FrameScheduler.FrameVisible", |
| this, |
| &tracing_controller_, |
| VisibilityStateToString), |
| frame_paused_(false, |
| "FrameScheduler.FramePaused", |
| this, |
| &tracing_controller_, |
| PausedStateToString), |
| frame_origin_type_(frame_type == FrameType::kMainFrame |
| ? FrameOriginType::kMainFrame |
| : FrameOriginType::kSameOriginFrame, |
| "FrameScheduler.Origin", |
| this, |
| &tracing_controller_, |
| FrameOriginTypeToString), |
| subresource_loading_paused_(false, |
| "FrameScheduler.SubResourceLoadingPaused", |
| this, |
| &tracing_controller_, |
| PausedStateToString), |
| url_tracer_("FrameScheduler.URL", this), |
| task_queue_throttled_(false, |
| "FrameScheduler.TaskQueueThrottled", |
| this, |
| &tracing_controller_, |
| YesNoStateToString), |
| active_connection_count_(0), |
| subresource_loading_pause_count_(0u), |
| has_active_connection_(false, |
| "FrameScheduler.HasActiveConnection", |
| this, |
| &tracing_controller_, |
| YesNoStateToString), |
| page_frozen_for_tracing_( |
| parent_page_scheduler_ ? parent_page_scheduler_->IsFrozen() : true, |
| "FrameScheduler.PageFrozen", |
| this, |
| &tracing_controller_, |
| FrozenStateToString), |
| page_visibility_for_tracing_( |
| parent_page_scheduler_ && parent_page_scheduler_->IsPageVisible() |
| ? PageVisibilityState::kVisible |
| : PageVisibilityState::kHidden, |
| "FrameScheduler.PageVisibility", |
| this, |
| &tracing_controller_, |
| PageVisibilityStateToString), |
| page_keep_active_for_tracing_( |
| parent_page_scheduler_ ? parent_page_scheduler_->KeepActive() : false, |
| "FrameScheduler.KeepActive", |
| this, |
| &tracing_controller_, |
| KeepActiveStateToString), |
| weak_factory_(this) {} |
| |
| FrameSchedulerImpl::FrameSchedulerImpl() |
| : FrameSchedulerImpl(nullptr, nullptr, nullptr, FrameType::kSubframe) {} |
| |
| namespace { |
| |
| void CleanUpQueue(MainThreadTaskQueue* queue) { |
| if (!queue) |
| return; |
| queue->DetachFromMainThreadScheduler(); |
| queue->DetachFromFrameScheduler(); |
| queue->SetBlameContext(nullptr); |
| queue->SetQueuePriority(TaskQueue::QueuePriority::kLowPriority); |
| } |
| |
| } // namespace |
| |
| FrameSchedulerImpl::~FrameSchedulerImpl() { |
| weak_factory_.InvalidateWeakPtrs(); |
| |
| RemoveThrottleableQueueFromBackgroundCPUTimeBudgetPool(); |
| |
| CleanUpQueue(loading_task_queue_.get()); |
| CleanUpQueue(loading_control_task_queue_.get()); |
| CleanUpQueue(throttleable_task_queue_.get()); |
| CleanUpQueue(deferrable_task_queue_.get()); |
| CleanUpQueue(pausable_task_queue_.get()); |
| CleanUpQueue(unpausable_task_queue_.get()); |
| |
| if (parent_page_scheduler_) { |
| parent_page_scheduler_->Unregister(this); |
| |
| if (has_active_connection()) |
| parent_page_scheduler_->OnConnectionUpdated(); |
| } |
| } |
| |
| void FrameSchedulerImpl::DetachFromPageScheduler() { |
| RemoveThrottleableQueueFromBackgroundCPUTimeBudgetPool(); |
| |
| parent_page_scheduler_ = nullptr; |
| } |
| |
| void FrameSchedulerImpl:: |
| RemoveThrottleableQueueFromBackgroundCPUTimeBudgetPool() { |
| if (!throttleable_task_queue_) |
| return; |
| |
| if (!parent_page_scheduler_) |
| return; |
| |
| CPUTimeBudgetPool* time_budget_pool = |
| parent_page_scheduler_->BackgroundCPUTimeBudgetPool(); |
| |
| if (!time_budget_pool) |
| return; |
| |
| time_budget_pool->RemoveQueue( |
| main_thread_scheduler_->tick_clock()->NowTicks(), |
| throttleable_task_queue_.get()); |
| } |
| |
| void FrameSchedulerImpl::SetFrameVisible(bool frame_visible) { |
| DCHECK(parent_page_scheduler_); |
| if (frame_visible_ == frame_visible) |
| return; |
| UMA_HISTOGRAM_BOOLEAN("RendererScheduler.IPC.FrameVisibility", frame_visible); |
| frame_visible_ = frame_visible; |
| UpdatePolicy(); |
| } |
| |
| bool FrameSchedulerImpl::IsFrameVisible() const { |
| return frame_visible_; |
| } |
| |
| void FrameSchedulerImpl::SetCrossOrigin(bool cross_origin) { |
| DCHECK(parent_page_scheduler_); |
| if (frame_origin_type_ == FrameOriginType::kMainFrame) { |
| DCHECK(!cross_origin); |
| return; |
| } |
| if (cross_origin) { |
| frame_origin_type_ = FrameOriginType::kCrossOriginFrame; |
| } else { |
| frame_origin_type_ = FrameOriginType::kSameOriginFrame; |
| } |
| UpdatePolicy(); |
| } |
| |
| bool FrameSchedulerImpl::IsCrossOrigin() const { |
| return frame_origin_type_ == FrameOriginType::kCrossOriginFrame; |
| } |
| |
| void FrameSchedulerImpl::TraceUrlChange(const String& url) { |
| url_tracer_.TraceString(url); |
| } |
| |
| FrameScheduler::FrameType FrameSchedulerImpl::GetFrameType() const { |
| return frame_type_; |
| } |
| |
| scoped_refptr<base::SingleThreadTaskRunner> FrameSchedulerImpl::GetTaskRunner( |
| TaskType type) { |
| // TODO(haraken): Optimize the mapping from TaskTypes to task runners. |
| switch (type) { |
| case TaskType::kJavascriptTimer: |
| return TaskQueueWithTaskType::Create(ThrottleableTaskQueue(), type); |
| case TaskType::kInternalLoading: |
| case TaskType::kNetworking: |
| return TaskQueueWithTaskType::Create(LoadingTaskQueue(), type); |
| case TaskType::kNetworkingControl: |
| return TaskQueueWithTaskType::Create(LoadingControlTaskQueue(), type); |
| // Throttling following tasks may break existing web pages, so tentatively |
| // these are unthrottled. |
| // TODO(nhiroki): Throttle them again after we're convinced that it's safe |
| // or provide a mechanism that web pages can opt-out it if throttling is not |
| // desirable. |
| case TaskType::kDatabaseAccess: |
| case TaskType::kDOMManipulation: |
| case TaskType::kHistoryTraversal: |
| case TaskType::kEmbed: |
| case TaskType::kCanvasBlobSerialization: |
| case TaskType::kRemoteEvent: |
| case TaskType::kWebSocket: |
| case TaskType::kMicrotask: |
| case TaskType::kUnshippedPortMessage: |
| case TaskType::kFileReading: |
| case TaskType::kPresentation: |
| case TaskType::kSensor: |
| case TaskType::kPerformanceTimeline: |
| case TaskType::kWebGL: |
| case TaskType::kIdleTask: |
| case TaskType::kInternalDefault: |
| case TaskType::kMiscPlatformAPI: |
| // TODO(altimin): Move appropriate tasks to throttleable task queue. |
| return TaskQueueWithTaskType::Create(DeferrableTaskQueue(), type); |
| // PostedMessage can be used for navigation, so we shouldn't defer it |
| // when expecting a user gesture. |
| case TaskType::kPostedMessage: |
| // UserInteraction tasks should be run even when expecting a user gesture. |
| case TaskType::kUserInteraction: |
| // Media events should not be deferred to ensure that media playback is |
| // smooth. |
| case TaskType::kMediaElementEvent: |
| case TaskType::kInternalTest: |
| case TaskType::kInternalWebCrypto: |
| case TaskType::kInternalIndexedDB: |
| case TaskType::kInternalMedia: |
| case TaskType::kInternalMediaRealTime: |
| case TaskType::kInternalUserInteraction: |
| case TaskType::kInternalIntersectionObserver: |
| case TaskType::kUnthrottled: |
| return TaskQueueWithTaskType::Create(PausableTaskQueue(), type); |
| case TaskType::kInternalIPC: |
| // The TaskType of Inspector tasks needs to be unpausable because they need |
| // to run even on a paused page. |
| case TaskType::kInternalInspector: |
| // The TaskType of worker tasks needs to be unpausable (in addition to |
| // unthrottled and undeferred) not to prevent service workers that may |
| // control browser navigation on multiple tabs. |
| case TaskType::kInternalWorker: |
| return TaskQueueWithTaskType::Create(UnpausableTaskQueue(), type); |
| case TaskType::kDeprecatedNone: |
| case TaskType::kMainThreadTaskQueueV8: |
| case TaskType::kMainThreadTaskQueueCompositor: |
| case TaskType::kMainThreadTaskQueueDefault: |
| case TaskType::kMainThreadTaskQueueInput: |
| case TaskType::kMainThreadTaskQueueIdle: |
| case TaskType::kMainThreadTaskQueueIPC: |
| case TaskType::kMainThreadTaskQueueControl: |
| case TaskType::kCompositorThreadTaskQueueDefault: |
| case TaskType::kWorkerThreadTaskQueueDefault: |
| case TaskType::kWorkerThreadTaskQueueV8: |
| case TaskType::kWorkerThreadTaskQueueCompositor: |
| case TaskType::kCount: |
| NOTREACHED(); |
| break; |
| } |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::LoadingTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!loading_task_queue_) { |
| // TODO(panicker): Avoid adding this queue in RS task_runners_. |
| loading_task_queue_ = main_thread_scheduler_->NewLoadingTaskQueue( |
| MainThreadTaskQueue::QueueType::kFrameLoading, this); |
| loading_task_queue_->SetBlameContext(blame_context_); |
| loading_queue_enabled_voter_ = |
| loading_task_queue_->CreateQueueEnabledVoter(); |
| loading_queue_enabled_voter_->SetQueueEnabled(!frame_paused_); |
| } |
| return loading_task_queue_; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::LoadingControlTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!loading_control_task_queue_) { |
| loading_control_task_queue_ = main_thread_scheduler_->NewLoadingTaskQueue( |
| MainThreadTaskQueue::QueueType::kFrameLoadingControl, this); |
| loading_control_task_queue_->SetBlameContext(blame_context_); |
| loading_control_queue_enabled_voter_ = |
| loading_control_task_queue_->CreateQueueEnabledVoter(); |
| loading_control_queue_enabled_voter_->SetQueueEnabled(!frame_paused_); |
| } |
| return loading_control_task_queue_; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::ThrottleableTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!throttleable_task_queue_) { |
| // TODO(panicker): Avoid adding this queue in RS task_runners_. |
| throttleable_task_queue_ = main_thread_scheduler_->NewTaskQueue( |
| MainThreadTaskQueue::QueueCreationParams( |
| MainThreadTaskQueue::QueueType::kFrameThrottleable) |
| .SetCanBeThrottled(true) |
| .SetCanBeFrozen(true) |
| .SetFreezeWhenKeepActive(true) |
| .SetCanBeDeferred(true) |
| .SetCanBePaused(true) |
| .SetFrameScheduler(this)); |
| throttleable_task_queue_->SetBlameContext(blame_context_); |
| throttleable_queue_enabled_voter_ = |
| throttleable_task_queue_->CreateQueueEnabledVoter(); |
| throttleable_queue_enabled_voter_->SetQueueEnabled(!frame_paused_); |
| |
| CPUTimeBudgetPool* time_budget_pool = |
| parent_page_scheduler_->BackgroundCPUTimeBudgetPool(); |
| if (time_budget_pool) { |
| time_budget_pool->AddQueue( |
| main_thread_scheduler_->tick_clock()->NowTicks(), |
| throttleable_task_queue_.get()); |
| } |
| UpdateThrottling(); |
| } |
| return throttleable_task_queue_; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::DeferrableTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!deferrable_task_queue_) { |
| deferrable_task_queue_ = main_thread_scheduler_->NewTaskQueue( |
| MainThreadTaskQueue::QueueCreationParams( |
| MainThreadTaskQueue::QueueType::kFrameDeferrable) |
| .SetCanBeDeferred(true) |
| .SetCanBeFrozen( |
| RuntimeEnabledFeatures::StopNonTimersInBackgroundEnabled()) |
| .SetCanBePaused(true) |
| .SetFrameScheduler(this)); |
| deferrable_task_queue_->SetBlameContext(blame_context_); |
| deferrable_queue_enabled_voter_ = |
| deferrable_task_queue_->CreateQueueEnabledVoter(); |
| deferrable_queue_enabled_voter_->SetQueueEnabled(!frame_paused_); |
| } |
| return deferrable_task_queue_; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::PausableTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!pausable_task_queue_) { |
| pausable_task_queue_ = main_thread_scheduler_->NewTaskQueue( |
| MainThreadTaskQueue::QueueCreationParams( |
| MainThreadTaskQueue::QueueType::kFramePausable) |
| .SetCanBeFrozen( |
| RuntimeEnabledFeatures::StopNonTimersInBackgroundEnabled()) |
| .SetCanBePaused(true) |
| .SetFrameScheduler(this)); |
| pausable_task_queue_->SetBlameContext(blame_context_); |
| pausable_queue_enabled_voter_ = |
| pausable_task_queue_->CreateQueueEnabledVoter(); |
| pausable_queue_enabled_voter_->SetQueueEnabled(!frame_paused_); |
| } |
| return pausable_task_queue_; |
| } |
| |
| scoped_refptr<TaskQueue> FrameSchedulerImpl::UnpausableTaskQueue() { |
| DCHECK(parent_page_scheduler_); |
| if (!unpausable_task_queue_) { |
| unpausable_task_queue_ = main_thread_scheduler_->NewTaskQueue( |
| MainThreadTaskQueue::QueueCreationParams( |
| MainThreadTaskQueue::QueueType::kFrameUnpausable) |
| .SetFrameScheduler(this)); |
| unpausable_task_queue_->SetBlameContext(blame_context_); |
| } |
| return unpausable_task_queue_; |
| } |
| |
| scoped_refptr<base::SingleThreadTaskRunner> |
| FrameSchedulerImpl::ControlTaskRunner() { |
| DCHECK(parent_page_scheduler_); |
| return main_thread_scheduler_->ControlTaskRunner(); |
| } |
| |
| blink::PageScheduler* FrameSchedulerImpl::GetPageScheduler() const { |
| return parent_page_scheduler_; |
| } |
| |
| void FrameSchedulerImpl::DidStartProvisionalLoad(bool is_main_frame) { |
| main_thread_scheduler_->DidStartProvisionalLoad(is_main_frame); |
| } |
| |
| void FrameSchedulerImpl::DidCommitProvisionalLoad( |
| bool is_web_history_inert_commit, |
| bool is_reload, |
| bool is_main_frame) { |
| main_thread_scheduler_->DidCommitProvisionalLoad(is_web_history_inert_commit, |
| is_reload, is_main_frame); |
| } |
| |
| WebScopedVirtualTimePauser FrameSchedulerImpl::CreateWebScopedVirtualTimePauser( |
| const WTF::String& name, |
| WebScopedVirtualTimePauser::VirtualTaskDuration duration) { |
| return WebScopedVirtualTimePauser(main_thread_scheduler_, duration, name); |
| } |
| |
| void FrameSchedulerImpl::DidOpenActiveConnection() { |
| ++active_connection_count_; |
| has_active_connection_ = static_cast<bool>(active_connection_count_); |
| if (parent_page_scheduler_) |
| parent_page_scheduler_->OnConnectionUpdated(); |
| } |
| |
| void FrameSchedulerImpl::DidCloseActiveConnection() { |
| DCHECK_GT(active_connection_count_, 0); |
| --active_connection_count_; |
| has_active_connection_ = static_cast<bool>(active_connection_count_); |
| if (parent_page_scheduler_) |
| parent_page_scheduler_->OnConnectionUpdated(); |
| } |
| |
| void FrameSchedulerImpl::UpdateQueuePriorities() { |
| UpdatePriority(loading_task_queue_.get()); |
| UpdatePriority(loading_control_task_queue_.get()); |
| UpdatePriority(throttleable_task_queue_.get()); |
| UpdatePriority(deferrable_task_queue_.get()); |
| UpdatePriority(pausable_task_queue_.get()); |
| UpdatePriority(unpausable_task_queue_.get()); |
| } |
| |
| void FrameSchedulerImpl::AsValueInto( |
| base::trace_event::TracedValue* state) const { |
| state->SetBoolean("frame_visible", frame_visible_); |
| state->SetBoolean("page_visible", parent_page_scheduler_->IsPageVisible()); |
| state->SetBoolean("cross_origin", IsCrossOrigin()); |
| state->SetString("frame_type", |
| frame_type_ == FrameScheduler::FrameType::kMainFrame |
| ? "MainFrame" |
| : "Subframe"); |
| if (loading_task_queue_) { |
| state->SetString("loading_task_queue", |
| PointerToString(loading_task_queue_.get())); |
| } |
| if (loading_control_task_queue_) { |
| state->SetString("loading_control_task_queue", |
| PointerToString(loading_control_task_queue_.get())); |
| } |
| if (throttleable_task_queue_) { |
| state->SetString("throttleable_task_queue", |
| PointerToString(throttleable_task_queue_.get())); |
| } |
| if (deferrable_task_queue_) { |
| state->SetString("deferrable_task_queue", |
| PointerToString(deferrable_task_queue_.get())); |
| } |
| if (pausable_task_queue_) { |
| state->SetString("pausable_task_queue", |
| PointerToString(pausable_task_queue_.get())); |
| } |
| if (unpausable_task_queue_) { |
| state->SetString("unpausable_task_queue", |
| PointerToString(unpausable_task_queue_.get())); |
| } |
| if (blame_context_) { |
| state->BeginDictionary("blame_context"); |
| state->SetString( |
| "id_ref", |
| PointerToString(reinterpret_cast<void*>(blame_context_->id()))); |
| state->SetString("scope", blame_context_->scope()); |
| state->EndDictionary(); |
| } |
| } |
| |
| void FrameSchedulerImpl::SetPageVisibilityForTracing( |
| PageVisibilityState page_visibility) { |
| page_visibility_for_tracing_ = page_visibility; |
| } |
| |
| bool FrameSchedulerImpl::IsPageVisible() const { |
| return parent_page_scheduler_ ? parent_page_scheduler_->IsPageVisible() |
| : true; |
| } |
| |
| bool FrameSchedulerImpl::IsAudioPlaying() const { |
| return parent_page_scheduler_ ? parent_page_scheduler_->IsAudioPlaying() |
| : false; |
| } |
| |
| void FrameSchedulerImpl::SetPaused(bool frame_paused) { |
| DCHECK(parent_page_scheduler_); |
| if (frame_paused_ == frame_paused) |
| return; |
| |
| frame_paused_ = frame_paused; |
| UpdatePolicy(); |
| } |
| |
| void FrameSchedulerImpl::SetPageFrozenForTracing(bool frozen) { |
| page_frozen_for_tracing_ = frozen; |
| } |
| |
| void FrameSchedulerImpl::SetPageKeepActiveForTracing(bool keep_active) { |
| page_keep_active_for_tracing_ = keep_active; |
| } |
| |
| void FrameSchedulerImpl::UpdatePolicy() { |
| // Per-frame (stoppable) task queues will be frozen after 5mins in |
| // background. They will be resumed when the page is visible. |
| UpdateQueuePolicy(throttleable_task_queue_, |
| throttleable_queue_enabled_voter_.get()); |
| UpdateQueuePolicy(loading_task_queue_, loading_queue_enabled_voter_.get()); |
| UpdateQueuePolicy(loading_control_task_queue_, |
| loading_control_queue_enabled_voter_.get()); |
| UpdateQueuePolicy(deferrable_task_queue_, |
| deferrable_queue_enabled_voter_.get()); |
| UpdateQueuePolicy(pausable_task_queue_, pausable_queue_enabled_voter_.get()); |
| |
| UpdateThrottling(); |
| |
| NotifyThrottlingObservers(); |
| } |
| |
| void FrameSchedulerImpl::UpdateQueuePolicy( |
| const scoped_refptr<MainThreadTaskQueue>& queue, |
| TaskQueue::QueueEnabledVoter* voter) { |
| if (!queue || !voter) |
| return; |
| DCHECK(parent_page_scheduler_); |
| bool queue_paused = frame_paused_ && queue->CanBePaused(); |
| bool queue_frozen = |
| parent_page_scheduler_->IsFrozen() && queue->CanBeFrozen(); |
| // Override freezing if keep-active is true. |
| if (queue_frozen && !queue->FreezeWhenKeepActive()) |
| queue_frozen = !parent_page_scheduler_->KeepActive(); |
| voter->SetQueueEnabled(!queue_paused && !queue_frozen); |
| } |
| |
| FrameScheduler::ThrottlingState FrameSchedulerImpl::CalculateThrottlingState( |
| ObserverType type) const { |
| // Detached frames are not throttled. |
| if (!parent_page_scheduler_) |
| return FrameScheduler::ThrottlingState::kNotThrottled; |
| |
| if (RuntimeEnabledFeatures::StopLoadingInBackgroundEnabled() && |
| parent_page_scheduler_->IsFrozen() && |
| !parent_page_scheduler_->KeepActive()) { |
| DCHECK(!parent_page_scheduler_->IsPageVisible()); |
| return FrameScheduler::ThrottlingState::kStopped; |
| } |
| if (subresource_loading_paused_ && type == ObserverType::kLoader) |
| return FrameScheduler::ThrottlingState::kStopped; |
| if (type == ObserverType::kLoader && |
| parent_page_scheduler_->HasActiveConnection()) { |
| return FrameScheduler::ThrottlingState::kNotThrottled; |
| } |
| if (parent_page_scheduler_->IsThrottled()) |
| return FrameScheduler::ThrottlingState::kThrottled; |
| if (!parent_page_scheduler_->IsPageVisible()) |
| return FrameScheduler::ThrottlingState::kHidden; |
| return FrameScheduler::ThrottlingState::kNotThrottled; |
| } |
| |
| void FrameSchedulerImpl::OnFirstMeaningfulPaint() { |
| main_thread_scheduler_->OnFirstMeaningfulPaint(); |
| } |
| |
| std::unique_ptr<FrameScheduler::ActiveConnectionHandle> |
| FrameSchedulerImpl::OnActiveConnectionCreated() { |
| return std::make_unique<FrameSchedulerImpl::ActiveConnectionHandleImpl>(this); |
| } |
| |
| bool FrameSchedulerImpl::ShouldThrottleTimers() const { |
| if (parent_page_scheduler_ && parent_page_scheduler_->IsAudioPlaying()) |
| return false; |
| if (!parent_page_scheduler_->IsPageVisible()) |
| return true; |
| return RuntimeEnabledFeatures::TimerThrottlingForHiddenFramesEnabled() && |
| !frame_visible_ && IsCrossOrigin(); |
| } |
| |
| void FrameSchedulerImpl::UpdateThrottling() { |
| // Before we initialize a trottleable task queue, |task_queue_throttled_| |
| // stays false and this function ensures it indicates whether are we holding |
| // a queue reference for throttler or not. |
| // Don't modify that value neither amend the reference counter anywhere else. |
| if (!throttleable_task_queue_) |
| return; |
| bool should_throttle = ShouldThrottleTimers(); |
| if (task_queue_throttled_ == should_throttle) |
| return; |
| task_queue_throttled_ = should_throttle; |
| |
| if (should_throttle) { |
| main_thread_scheduler_->task_queue_throttler()->IncreaseThrottleRefCount( |
| throttleable_task_queue_.get()); |
| } else { |
| main_thread_scheduler_->task_queue_throttler()->DecreaseThrottleRefCount( |
| throttleable_task_queue_.get()); |
| } |
| } |
| |
| bool FrameSchedulerImpl::IsExemptFromBudgetBasedThrottling() const { |
| return has_active_connection(); |
| } |
| |
| TaskQueue::QueuePriority FrameSchedulerImpl::ComputePriority( |
| MainThreadTaskQueue* task_queue) const { |
| DCHECK(task_queue); |
| |
| FrameScheduler* frame_scheduler = task_queue->GetFrameScheduler(); |
| |
| // Checks the task queue is associated with this frame scheduler. |
| DCHECK_EQ(frame_scheduler, this); |
| |
| base::Optional<TaskQueue::QueuePriority> fixed_priority = |
| task_queue->FixedPriority(); |
| |
| if (fixed_priority) |
| return fixed_priority.value(); |
| |
| bool background_page_with_no_audio = !IsPageVisible() && !IsAudioPlaying(); |
| |
| if (background_page_with_no_audio) { |
| if (base::FeatureList::IsEnabled(kLowPriorityForBackgroundPages)) |
| return TaskQueue::QueuePriority::kLowPriority; |
| |
| if (base::FeatureList::IsEnabled(kBestEffortPriorityForBackgroundPages)) |
| return TaskQueue::QueuePriority::kBestEffortPriority; |
| } |
| |
| // TODO(farahcharab) Add further logic depending on frame origin/type, |
| // |use_case|, and which finch experiment is enabled. |
| return task_queue->queue_type() == |
| MainThreadTaskQueue::QueueType::kFrameLoadingControl |
| ? TaskQueue::QueuePriority::kHighestPriority |
| : TaskQueue::QueuePriority::kNormalPriority; |
| } |
| |
| std::unique_ptr<blink::mojom::blink::PauseSubresourceLoadingHandle> |
| FrameSchedulerImpl::GetPauseSubresourceLoadingHandle() { |
| return std::make_unique<PauseSubresourceLoadingHandleImpl>( |
| weak_factory_.GetWeakPtr()); |
| } |
| |
| void FrameSchedulerImpl::AddPauseSubresourceLoadingHandle() { |
| ++subresource_loading_pause_count_; |
| if (subresource_loading_pause_count_ != 1) { |
| DCHECK(subresource_loading_paused_); |
| return; |
| } |
| |
| DCHECK(!subresource_loading_paused_); |
| subresource_loading_paused_ = true; |
| UpdatePolicy(); |
| } |
| |
| void FrameSchedulerImpl::RemovePauseSubresourceLoadingHandle() { |
| DCHECK_LT(0u, subresource_loading_pause_count_); |
| --subresource_loading_pause_count_; |
| DCHECK(subresource_loading_paused_); |
| if (subresource_loading_pause_count_ == 0) { |
| subresource_loading_paused_ = false; |
| UpdatePolicy(); |
| } |
| } |
| |
| } // namespace scheduler |
| } // namespace blink |
