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Unified Diff: cc/scheduler/scheduler.cc

Issue 1533773002: Delete CC. (Closed) Base URL: git@github.com:domokit/mojo.git@cl-2e
Patch Set: rebase Created 5 years ago
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Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
deleted file mode 100644
index 0efaab9fa2d628cac6077f06f727a14103a35d7e..0000000000000000000000000000000000000000
--- a/cc/scheduler/scheduler.cc
+++ /dev/null
@@ -1,836 +0,0 @@
-// Copyright 2011 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 "cc/scheduler/scheduler.h"
-
-#include <algorithm>
-
-#include "base/auto_reset.h"
-#include "base/logging.h"
-#include "base/profiler/scoped_tracker.h"
-#include "base/single_thread_task_runner.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/debug/traced_value.h"
-#include "cc/scheduler/delay_based_time_source.h"
-#include "ui/gfx/frame_time.h"
-
-namespace cc {
-
-BeginFrameSource* SchedulerFrameSourcesConstructor::ConstructPrimaryFrameSource(
- Scheduler* scheduler) {
- if (scheduler->settings_.use_external_begin_frame_source) {
- TRACE_EVENT1("cc",
- "Scheduler::Scheduler()",
- "PrimaryFrameSource",
- "ExternalBeginFrameSource");
- DCHECK(scheduler->primary_frame_source_internal_)
- << "Need external BeginFrameSource";
- return scheduler->primary_frame_source_internal_.get();
- } else {
- TRACE_EVENT1("cc",
- "Scheduler::Scheduler()",
- "PrimaryFrameSource",
- "SyntheticBeginFrameSource");
- scoped_ptr<SyntheticBeginFrameSource> synthetic_source =
- SyntheticBeginFrameSource::Create(scheduler->task_runner_.get(),
- scheduler->Now(),
- BeginFrameArgs::DefaultInterval());
-
- DCHECK(!scheduler->vsync_observer_);
- scheduler->vsync_observer_ = synthetic_source.get();
-
- DCHECK(!scheduler->primary_frame_source_internal_);
- scheduler->primary_frame_source_internal_ = synthetic_source.Pass();
- return scheduler->primary_frame_source_internal_.get();
- }
-}
-
-BeginFrameSource*
-SchedulerFrameSourcesConstructor::ConstructBackgroundFrameSource(
- Scheduler* scheduler) {
- TRACE_EVENT1("cc",
- "Scheduler::Scheduler()",
- "BackgroundFrameSource",
- "SyntheticBeginFrameSource");
- DCHECK(!(scheduler->background_frame_source_internal_));
- scheduler->background_frame_source_internal_ =
- SyntheticBeginFrameSource::Create(
- scheduler->task_runner_.get(), scheduler->Now(),
- scheduler->settings_.background_frame_interval);
- return scheduler->background_frame_source_internal_.get();
-}
-
-BeginFrameSource*
-SchedulerFrameSourcesConstructor::ConstructUnthrottledFrameSource(
- Scheduler* scheduler) {
- TRACE_EVENT1("cc", "Scheduler::Scheduler()", "UnthrottledFrameSource",
- "BackToBackBeginFrameSource");
- DCHECK(!scheduler->unthrottled_frame_source_internal_);
- scheduler->unthrottled_frame_source_internal_ =
- BackToBackBeginFrameSource::Create(scheduler->task_runner_.get());
- return scheduler->unthrottled_frame_source_internal_.get();
-}
-
-Scheduler::Scheduler(
- SchedulerClient* client,
- const SchedulerSettings& scheduler_settings,
- int layer_tree_host_id,
- const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
- scoped_ptr<BeginFrameSource> external_begin_frame_source,
- SchedulerFrameSourcesConstructor* frame_sources_constructor)
- : frame_source_(),
- primary_frame_source_(NULL),
- background_frame_source_(NULL),
- primary_frame_source_internal_(external_begin_frame_source.Pass()),
- background_frame_source_internal_(),
- vsync_observer_(NULL),
- throttle_frame_production_(scheduler_settings.throttle_frame_production),
- settings_(scheduler_settings),
- client_(client),
- layer_tree_host_id_(layer_tree_host_id),
- task_runner_(task_runner),
- state_machine_(scheduler_settings),
- inside_process_scheduled_actions_(false),
- inside_action_(SchedulerStateMachine::ACTION_NONE),
- weak_factory_(this) {
- TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
- "Scheduler::Scheduler",
- "settings",
- settings_.AsValue());
- DCHECK(client_);
- DCHECK(!state_machine_.BeginFrameNeeded());
-
- begin_retro_frame_closure_ =
- base::Bind(&Scheduler::BeginRetroFrame, weak_factory_.GetWeakPtr());
- begin_impl_frame_deadline_closure_ = base::Bind(
- &Scheduler::OnBeginImplFrameDeadline, weak_factory_.GetWeakPtr());
- poll_for_draw_triggers_closure_ = base::Bind(
- &Scheduler::PollForAnticipatedDrawTriggers, weak_factory_.GetWeakPtr());
- advance_commit_state_closure_ = base::Bind(
- &Scheduler::PollToAdvanceCommitState, weak_factory_.GetWeakPtr());
-
- frame_source_ = BeginFrameSourceMultiplexer::Create();
- frame_source_->AddObserver(this);
-
- // Primary frame source
- primary_frame_source_ =
- frame_sources_constructor->ConstructPrimaryFrameSource(this);
- frame_source_->AddSource(primary_frame_source_);
- primary_frame_source_->SetClientReady();
-
- // Background ticking frame source
- background_frame_source_ =
- frame_sources_constructor->ConstructBackgroundFrameSource(this);
- frame_source_->AddSource(background_frame_source_);
-
- // Unthrottled frame source
- unthrottled_frame_source_ =
- frame_sources_constructor->ConstructUnthrottledFrameSource(this);
- frame_source_->AddSource(unthrottled_frame_source_);
-}
-
-Scheduler::~Scheduler() {
- if (frame_source_->NeedsBeginFrames())
- frame_source_->SetNeedsBeginFrames(false);
-}
-
-base::TimeTicks Scheduler::Now() const {
- base::TimeTicks now = gfx::FrameTime::Now();
- TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.now"),
- "Scheduler::Now",
- "now",
- now);
- return now;
-}
-
-void Scheduler::CommitVSyncParameters(base::TimeTicks timebase,
- base::TimeDelta interval) {
- // TODO(brianderson): We should not be receiving 0 intervals.
- if (interval == base::TimeDelta())
- interval = BeginFrameArgs::DefaultInterval();
-
- if (vsync_observer_)
- vsync_observer_->OnUpdateVSyncParameters(timebase, interval);
-}
-
-void Scheduler::SetEstimatedParentDrawTime(base::TimeDelta draw_time) {
- DCHECK_GE(draw_time.ToInternalValue(), 0);
- estimated_parent_draw_time_ = draw_time;
-}
-
-void Scheduler::SetCanStart() {
- state_machine_.SetCanStart();
- ProcessScheduledActions();
-}
-
-void Scheduler::UpdateActiveFrameSource() {
- if (state_machine_.visible()) {
- if (throttle_frame_production_) {
- frame_source_->SetActiveSource(primary_frame_source_);
- } else {
- frame_source_->SetActiveSource(unthrottled_frame_source_);
- }
- } else {
- frame_source_->SetActiveSource(background_frame_source_);
- }
- ProcessScheduledActions();
-}
-
-void Scheduler::SetVisible(bool visible) {
- state_machine_.SetVisible(visible);
- UpdateActiveFrameSource();
-}
-
-void Scheduler::SetCanDraw(bool can_draw) {
- state_machine_.SetCanDraw(can_draw);
- ProcessScheduledActions();
-}
-
-void Scheduler::NotifyReadyToActivate() {
- state_machine_.NotifyReadyToActivate();
- ProcessScheduledActions();
-}
-
-void Scheduler::NotifyReadyToDraw() {
- // Empty for now, until we take action based on the notification as part of
- // crbugs 352894, 383157, 421923.
-}
-
-void Scheduler::SetThrottleFrameProduction(bool throttle) {
- throttle_frame_production_ = throttle;
- UpdateActiveFrameSource();
-}
-
-void Scheduler::SetNeedsCommit() {
- state_machine_.SetNeedsCommit();
- ProcessScheduledActions();
-}
-
-void Scheduler::SetNeedsRedraw() {
- state_machine_.SetNeedsRedraw();
- ProcessScheduledActions();
-}
-
-void Scheduler::SetNeedsAnimate() {
- state_machine_.SetNeedsAnimate();
- ProcessScheduledActions();
-}
-
-void Scheduler::SetNeedsPrepareTiles() {
- DCHECK(!IsInsideAction(SchedulerStateMachine::ACTION_PREPARE_TILES));
- state_machine_.SetNeedsPrepareTiles();
- ProcessScheduledActions();
-}
-
-void Scheduler::SetMaxSwapsPending(int max) {
- state_machine_.SetMaxSwapsPending(max);
-}
-
-void Scheduler::DidSwapBuffers() {
- state_machine_.DidSwapBuffers();
-
- // There is no need to call ProcessScheduledActions here because
- // swapping should not trigger any new actions.
- if (!inside_process_scheduled_actions_) {
- DCHECK_EQ(state_machine_.NextAction(), SchedulerStateMachine::ACTION_NONE);
- }
-}
-
-void Scheduler::DidSwapBuffersComplete() {
- state_machine_.DidSwapBuffersComplete();
- ProcessScheduledActions();
-}
-
-void Scheduler::SetImplLatencyTakesPriority(bool impl_latency_takes_priority) {
- state_machine_.SetImplLatencyTakesPriority(impl_latency_takes_priority);
- ProcessScheduledActions();
-}
-
-void Scheduler::NotifyReadyToCommit() {
- TRACE_EVENT0("cc", "Scheduler::NotifyReadyToCommit");
- state_machine_.NotifyReadyToCommit();
- ProcessScheduledActions();
-}
-
-void Scheduler::BeginMainFrameAborted(CommitEarlyOutReason reason) {
- TRACE_EVENT1("cc", "Scheduler::BeginMainFrameAborted", "reason",
- CommitEarlyOutReasonToString(reason));
- state_machine_.BeginMainFrameAborted(reason);
- ProcessScheduledActions();
-}
-
-void Scheduler::DidPrepareTiles() {
- state_machine_.DidPrepareTiles();
-}
-
-void Scheduler::DidLoseOutputSurface() {
- TRACE_EVENT0("cc", "Scheduler::DidLoseOutputSurface");
- begin_retro_frame_args_.clear();
- begin_retro_frame_task_.Cancel();
- state_machine_.DidLoseOutputSurface();
- ProcessScheduledActions();
-}
-
-void Scheduler::DidCreateAndInitializeOutputSurface() {
- TRACE_EVENT0("cc", "Scheduler::DidCreateAndInitializeOutputSurface");
- DCHECK(!frame_source_->NeedsBeginFrames());
- DCHECK(begin_impl_frame_deadline_task_.IsCancelled());
- state_machine_.DidCreateAndInitializeOutputSurface();
- ProcessScheduledActions();
-}
-
-void Scheduler::NotifyBeginMainFrameStarted() {
- TRACE_EVENT0("cc", "Scheduler::NotifyBeginMainFrameStarted");
- state_machine_.NotifyBeginMainFrameStarted();
-}
-
-base::TimeTicks Scheduler::AnticipatedDrawTime() const {
- if (!frame_source_->NeedsBeginFrames() ||
- begin_impl_frame_args_.interval <= base::TimeDelta())
- return base::TimeTicks();
-
- base::TimeTicks now = Now();
- base::TimeTicks timebase = std::max(begin_impl_frame_args_.frame_time,
- begin_impl_frame_args_.deadline);
- int64 intervals = 1 + ((now - timebase) / begin_impl_frame_args_.interval);
- return timebase + (begin_impl_frame_args_.interval * intervals);
-}
-
-base::TimeTicks Scheduler::LastBeginImplFrameTime() {
- return begin_impl_frame_args_.frame_time;
-}
-
-void Scheduler::SetupNextBeginFrameIfNeeded() {
- // Never call SetNeedsBeginFrames if the frame source already has the right
- // value.
- if (frame_source_->NeedsBeginFrames() != state_machine_.BeginFrameNeeded()) {
- if (state_machine_.BeginFrameNeeded()) {
- // Call SetNeedsBeginFrames(true) as soon as possible.
- frame_source_->SetNeedsBeginFrames(true);
- } else if (state_machine_.begin_impl_frame_state() ==
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE) {
- // Call SetNeedsBeginFrames(false) in between frames only.
- frame_source_->SetNeedsBeginFrames(false);
- client_->SendBeginMainFrameNotExpectedSoon();
- }
- }
-
- PostBeginRetroFrameIfNeeded();
-}
-
-// We may need to poll when we can't rely on BeginFrame to advance certain
-// state or to avoid deadlock.
-void Scheduler::SetupPollingMechanisms() {
- bool needs_advance_commit_state_timer = false;
- // Setup PollForAnticipatedDrawTriggers if we need to monitor state but
- // aren't expecting any more BeginFrames. This should only be needed by
- // the synchronous compositor when BeginFrameNeeded is false.
- if (state_machine_.ShouldPollForAnticipatedDrawTriggers()) {
- DCHECK(!state_machine_.SupportsProactiveBeginFrame());
- if (poll_for_draw_triggers_task_.IsCancelled()) {
- poll_for_draw_triggers_task_.Reset(poll_for_draw_triggers_closure_);
- base::TimeDelta delay = begin_impl_frame_args_.IsValid()
- ? begin_impl_frame_args_.interval
- : BeginFrameArgs::DefaultInterval();
- task_runner_->PostDelayedTask(
- FROM_HERE, poll_for_draw_triggers_task_.callback(), delay);
- }
- } else {
- poll_for_draw_triggers_task_.Cancel();
-
- // At this point we'd prefer to advance through the commit flow by
- // drawing a frame, however it's possible that the frame rate controller
- // will not give us a BeginFrame until the commit completes. See
- // crbug.com/317430 for an example of a swap ack being held on commit. Thus
- // we set a repeating timer to poll on ProcessScheduledActions until we
- // successfully reach BeginFrame. Synchronous compositor does not use
- // frame rate controller or have the circular wait in the bug.
- if (IsBeginMainFrameSentOrStarted() &&
- !settings_.using_synchronous_renderer_compositor) {
- needs_advance_commit_state_timer = true;
- }
- }
-
- if (needs_advance_commit_state_timer) {
- if (advance_commit_state_task_.IsCancelled() &&
- begin_impl_frame_args_.IsValid()) {
- // Since we'd rather get a BeginImplFrame by the normal mechanism, we
- // set the interval to twice the interval from the previous frame.
- advance_commit_state_task_.Reset(advance_commit_state_closure_);
- task_runner_->PostDelayedTask(FROM_HERE,
- advance_commit_state_task_.callback(),
- begin_impl_frame_args_.interval * 2);
- }
- } else {
- advance_commit_state_task_.Cancel();
- }
-}
-
-// BeginFrame is the mechanism that tells us that now is a good time to start
-// making a frame. Usually this means that user input for the frame is complete.
-// If the scheduler is busy, we queue the BeginFrame to be handled later as
-// a BeginRetroFrame.
-bool Scheduler::OnBeginFrameMixInDelegate(const BeginFrameArgs& args) {
- TRACE_EVENT1("cc,benchmark", "Scheduler::BeginFrame", "args", args.AsValue());
-
- // Deliver BeginFrames to children.
- if (state_machine_.children_need_begin_frames()) {
- BeginFrameArgs adjusted_args_for_children(args);
- // Adjust a deadline for child schedulers.
- // TODO(simonhong): Once we have commitless update, we can get rid of
- // BeginMainFrameToCommitDurationEstimate() +
- // CommitToActivateDurationEstimate().
- adjusted_args_for_children.deadline -=
- (client_->BeginMainFrameToCommitDurationEstimate() +
- client_->CommitToActivateDurationEstimate() +
- client_->DrawDurationEstimate() + EstimatedParentDrawTime());
- client_->SendBeginFramesToChildren(adjusted_args_for_children);
- }
-
- // We have just called SetNeedsBeginFrame(true) and the BeginFrameSource has
- // sent us the last BeginFrame we have missed. As we might not be able to
- // actually make rendering for this call, handle it like a "retro frame".
- // TODO(brainderson): Add a test for this functionality ASAP!
- if (args.type == BeginFrameArgs::MISSED) {
- begin_retro_frame_args_.push_back(args);
- PostBeginRetroFrameIfNeeded();
- return true;
- }
-
- BeginFrameArgs adjusted_args(args);
- adjusted_args.deadline -= EstimatedParentDrawTime();
-
- bool should_defer_begin_frame;
- if (settings_.using_synchronous_renderer_compositor) {
- should_defer_begin_frame = false;
- } else {
- should_defer_begin_frame =
- !begin_retro_frame_args_.empty() ||
- !begin_retro_frame_task_.IsCancelled() ||
- !frame_source_->NeedsBeginFrames() ||
- (state_machine_.begin_impl_frame_state() !=
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
- }
-
- if (should_defer_begin_frame) {
- begin_retro_frame_args_.push_back(adjusted_args);
- TRACE_EVENT_INSTANT0(
- "cc", "Scheduler::BeginFrame deferred", TRACE_EVENT_SCOPE_THREAD);
- // Queuing the frame counts as "using it", so we need to return true.
- } else {
- BeginImplFrame(adjusted_args);
- }
- return true;
-}
-
-void Scheduler::SetChildrenNeedBeginFrames(bool children_need_begin_frames) {
- state_machine_.SetChildrenNeedBeginFrames(children_need_begin_frames);
- ProcessScheduledActions();
-}
-
-// BeginRetroFrame is called for BeginFrames that we've deferred because
-// the scheduler was in the middle of processing a previous BeginFrame.
-void Scheduler::BeginRetroFrame() {
- TRACE_EVENT0("cc,benchmark", "Scheduler::BeginRetroFrame");
- DCHECK(!settings_.using_synchronous_renderer_compositor);
- DCHECK(!begin_retro_frame_args_.empty());
- DCHECK(!begin_retro_frame_task_.IsCancelled());
- DCHECK_EQ(state_machine_.begin_impl_frame_state(),
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
-
- begin_retro_frame_task_.Cancel();
-
- // Discard expired BeginRetroFrames
- // Today, we should always end up with at most one un-expired BeginRetroFrame
- // because deadlines will not be greater than the next frame time. We don't
- // DCHECK though because some systems don't always have monotonic timestamps.
- // TODO(brianderson): In the future, long deadlines could result in us not
- // draining the queue if we don't catch up. If we consistently can't catch
- // up, our fallback should be to lower our frame rate.
- base::TimeTicks now = Now();
-
- while (!begin_retro_frame_args_.empty()) {
- const BeginFrameArgs& args = begin_retro_frame_args_.front();
- base::TimeTicks expiration_time = args.frame_time + args.interval;
- if (now <= expiration_time)
- break;
- TRACE_EVENT_INSTANT2(
- "cc", "Scheduler::BeginRetroFrame discarding", TRACE_EVENT_SCOPE_THREAD,
- "expiration_time - now", (expiration_time - now).InMillisecondsF(),
- "BeginFrameArgs", begin_retro_frame_args_.front().AsValue());
- begin_retro_frame_args_.pop_front();
- frame_source_->DidFinishFrame(begin_retro_frame_args_.size());
- }
-
- if (begin_retro_frame_args_.empty()) {
- TRACE_EVENT_INSTANT0("cc",
- "Scheduler::BeginRetroFrames all expired",
- TRACE_EVENT_SCOPE_THREAD);
- } else {
- BeginFrameArgs front = begin_retro_frame_args_.front();
- begin_retro_frame_args_.pop_front();
- BeginImplFrame(front);
- }
-}
-
-// There could be a race between the posted BeginRetroFrame and a new
-// BeginFrame arriving via the normal mechanism. Scheduler::BeginFrame
-// will check if there is a pending BeginRetroFrame to ensure we handle
-// BeginFrames in FIFO order.
-void Scheduler::PostBeginRetroFrameIfNeeded() {
- TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
- "Scheduler::PostBeginRetroFrameIfNeeded",
- "state",
- AsValue());
- if (!frame_source_->NeedsBeginFrames())
- return;
-
- if (begin_retro_frame_args_.empty() || !begin_retro_frame_task_.IsCancelled())
- return;
-
- // begin_retro_frame_args_ should always be empty for the
- // synchronous compositor.
- DCHECK(!settings_.using_synchronous_renderer_compositor);
-
- if (state_machine_.begin_impl_frame_state() !=
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE)
- return;
-
- begin_retro_frame_task_.Reset(begin_retro_frame_closure_);
-
- task_runner_->PostTask(FROM_HERE, begin_retro_frame_task_.callback());
-}
-
-// BeginImplFrame starts a compositor frame that will wait up until a deadline
-// for a BeginMainFrame+activation to complete before it times out and draws
-// any asynchronous animation and scroll/pinch updates.
-void Scheduler::BeginImplFrame(const BeginFrameArgs& args) {
- bool main_thread_is_in_high_latency_mode =
- state_machine_.MainThreadIsInHighLatencyMode();
- TRACE_EVENT2("cc,benchmark",
- "Scheduler::BeginImplFrame",
- "args",
- args.AsValue(),
- "main_thread_is_high_latency",
- main_thread_is_in_high_latency_mode);
- TRACE_COUNTER1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
- "MainThreadLatency",
- main_thread_is_in_high_latency_mode);
- DCHECK_EQ(state_machine_.begin_impl_frame_state(),
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
- DCHECK(state_machine_.HasInitializedOutputSurface());
-
- advance_commit_state_task_.Cancel();
-
- begin_impl_frame_args_ = args;
- begin_impl_frame_args_.deadline -= client_->DrawDurationEstimate();
-
- if (!state_machine_.impl_latency_takes_priority() &&
- main_thread_is_in_high_latency_mode &&
- CanCommitAndActivateBeforeDeadline()) {
- state_machine_.SetSkipNextBeginMainFrameToReduceLatency();
- }
-
- state_machine_.OnBeginImplFrame();
- client_->WillBeginImplFrame(begin_impl_frame_args_);
-
- ProcessScheduledActions();
-
- state_machine_.OnBeginImplFrameDeadlinePending();
-
- if (settings_.using_synchronous_renderer_compositor) {
- // The synchronous renderer compositor has to make its GL calls
- // within this call.
- // TODO(brianderson): Have the OutputSurface initiate the deadline tasks
- // so the synchronous renderer compositor can take advantage of splitting
- // up the BeginImplFrame and deadline as well.
- OnBeginImplFrameDeadline();
- } else {
- ScheduleBeginImplFrameDeadline();
- }
-}
-
-void Scheduler::ScheduleBeginImplFrameDeadline() {
- // The synchronous compositor does not post a deadline task.
- DCHECK(!settings_.using_synchronous_renderer_compositor);
-
- begin_impl_frame_deadline_task_.Cancel();
- begin_impl_frame_deadline_task_.Reset(begin_impl_frame_deadline_closure_);
-
- begin_impl_frame_deadline_mode_ =
- state_machine_.CurrentBeginImplFrameDeadlineMode();
-
- base::TimeTicks deadline;
- switch (begin_impl_frame_deadline_mode_) {
- case SchedulerStateMachine::BEGIN_IMPL_FRAME_DEADLINE_MODE_IMMEDIATE:
- // We are ready to draw a new active tree immediately.
- // We don't use Now() here because it's somewhat expensive to call.
- deadline = base::TimeTicks();
- break;
- case SchedulerStateMachine::BEGIN_IMPL_FRAME_DEADLINE_MODE_REGULAR:
- // We are animating on the impl thread but we can wait for some time.
- deadline = begin_impl_frame_args_.deadline;
- break;
- case SchedulerStateMachine::BEGIN_IMPL_FRAME_DEADLINE_MODE_LATE:
- // We are blocked for one reason or another and we should wait.
- // TODO(brianderson): Handle long deadlines (that are past the next
- // frame's frame time) properly instead of using this hack.
- deadline =
- begin_impl_frame_args_.frame_time + begin_impl_frame_args_.interval;
- break;
- }
-
- TRACE_EVENT1(
- "cc", "Scheduler::ScheduleBeginImplFrameDeadline", "deadline", deadline);
-
- base::TimeDelta delta = deadline - Now();
- if (delta <= base::TimeDelta())
- delta = base::TimeDelta();
- task_runner_->PostDelayedTask(
- FROM_HERE, begin_impl_frame_deadline_task_.callback(), delta);
-}
-
-void Scheduler::RescheduleBeginImplFrameDeadlineIfNeeded() {
- if (settings_.using_synchronous_renderer_compositor)
- return;
-
- if (state_machine_.begin_impl_frame_state() !=
- SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_INSIDE_BEGIN_FRAME)
- return;
-
- if (begin_impl_frame_deadline_mode_ !=
- state_machine_.CurrentBeginImplFrameDeadlineMode())
- ScheduleBeginImplFrameDeadline();
-}
-
-void Scheduler::OnBeginImplFrameDeadline() {
- TRACE_EVENT0("cc,benchmark", "Scheduler::OnBeginImplFrameDeadline");
- begin_impl_frame_deadline_task_.Cancel();
- // We split the deadline actions up into two phases so the state machine
- // has a chance to trigger actions that should occur durring and after
- // the deadline separately. For example:
- // * Sending the BeginMainFrame will not occur after the deadline in
- // order to wait for more user-input before starting the next commit.
- // * Creating a new OuputSurface will not occur during the deadline in
- // order to allow the state machine to "settle" first.
-
- // TODO(robliao): Remove ScopedTracker below once crbug.com/461509 is fixed.
- tracked_objects::ScopedTracker tracking_profile1(
- FROM_HERE_WITH_EXPLICIT_FUNCTION(
- "461509 Scheduler::OnBeginImplFrameDeadline1"));
- state_machine_.OnBeginImplFrameDeadline();
- ProcessScheduledActions();
- state_machine_.OnBeginImplFrameIdle();
- ProcessScheduledActions();
-
- client_->DidBeginImplFrameDeadline();
- frame_source_->DidFinishFrame(begin_retro_frame_args_.size());
-}
-
-void Scheduler::PollForAnticipatedDrawTriggers() {
- TRACE_EVENT0("cc", "Scheduler::PollForAnticipatedDrawTriggers");
- poll_for_draw_triggers_task_.Cancel();
- state_machine_.DidEnterPollForAnticipatedDrawTriggers();
- ProcessScheduledActions();
- state_machine_.DidLeavePollForAnticipatedDrawTriggers();
-}
-
-void Scheduler::PollToAdvanceCommitState() {
- TRACE_EVENT0("cc", "Scheduler::PollToAdvanceCommitState");
- advance_commit_state_task_.Cancel();
- ProcessScheduledActions();
-}
-
-void Scheduler::DrawAndSwapIfPossible() {
- DrawResult result = client_->ScheduledActionDrawAndSwapIfPossible();
- state_machine_.DidDrawIfPossibleCompleted(result);
-}
-
-void Scheduler::SetDeferCommits(bool defer_commits) {
- TRACE_EVENT1("cc", "Scheduler::SetDeferCommits",
- "defer_commits",
- defer_commits);
- state_machine_.SetDeferCommits(defer_commits);
- ProcessScheduledActions();
-}
-
-void Scheduler::ProcessScheduledActions() {
- // We do not allow ProcessScheduledActions to be recursive.
- // The top-level call will iteratively execute the next action for us anyway.
- if (inside_process_scheduled_actions_)
- return;
-
- base::AutoReset<bool> mark_inside(&inside_process_scheduled_actions_, true);
-
- SchedulerStateMachine::Action action;
- do {
- action = state_machine_.NextAction();
- TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
- "SchedulerStateMachine",
- "state",
- AsValue());
- VLOG(2) << "Scheduler::ProcessScheduledActions: "
- << SchedulerStateMachine::ActionToString(action) << " "
- << state_machine_.GetStatesForDebugging();
- state_machine_.UpdateState(action);
- base::AutoReset<SchedulerStateMachine::Action>
- mark_inside_action(&inside_action_, action);
- switch (action) {
- case SchedulerStateMachine::ACTION_NONE:
- break;
- case SchedulerStateMachine::ACTION_ANIMATE:
- client_->ScheduledActionAnimate();
- break;
- case SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME:
- client_->ScheduledActionSendBeginMainFrame();
- break;
- case SchedulerStateMachine::ACTION_COMMIT: {
- // TODO(robliao): Remove ScopedTracker below once crbug.com/461509 is
- // fixed.
- tracked_objects::ScopedTracker tracking_profile4(
- FROM_HERE_WITH_EXPLICIT_FUNCTION(
- "461509 Scheduler::ProcessScheduledActions4"));
- client_->ScheduledActionCommit();
- break;
- }
- case SchedulerStateMachine::ACTION_ACTIVATE_SYNC_TREE:
- client_->ScheduledActionActivateSyncTree();
- break;
- case SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE: {
- // TODO(robliao): Remove ScopedTracker below once crbug.com/461509 is
- // fixed.
- tracked_objects::ScopedTracker tracking_profile6(
- FROM_HERE_WITH_EXPLICIT_FUNCTION(
- "461509 Scheduler::ProcessScheduledActions6"));
- DrawAndSwapIfPossible();
- break;
- }
- case SchedulerStateMachine::ACTION_DRAW_AND_SWAP_FORCED:
- client_->ScheduledActionDrawAndSwapForced();
- break;
- case SchedulerStateMachine::ACTION_DRAW_AND_SWAP_ABORT:
- // No action is actually performed, but this allows the state machine to
- // advance out of its waiting to draw state without actually drawing.
- break;
- case SchedulerStateMachine::ACTION_BEGIN_OUTPUT_SURFACE_CREATION:
- client_->ScheduledActionBeginOutputSurfaceCreation();
- break;
- case SchedulerStateMachine::ACTION_PREPARE_TILES:
- client_->ScheduledActionPrepareTiles();
- break;
- }
- } while (action != SchedulerStateMachine::ACTION_NONE);
-
- SetupPollingMechanisms();
-
- client_->DidAnticipatedDrawTimeChange(AnticipatedDrawTime());
-
- RescheduleBeginImplFrameDeadlineIfNeeded();
-
- SetupNextBeginFrameIfNeeded();
-}
-
-scoped_refptr<base::trace_event::ConvertableToTraceFormat> Scheduler::AsValue()
- const {
- scoped_refptr<base::trace_event::TracedValue> state =
- new base::trace_event::TracedValue();
- AsValueInto(state.get());
- return state;
-}
-
-void Scheduler::AsValueInto(base::trace_event::TracedValue* state) const {
- state->BeginDictionary("state_machine");
- state_machine_.AsValueInto(state);
- state->EndDictionary();
-
- // Only trace frame sources when explicitly enabled - http://crbug.com/420607
- bool frame_tracing_enabled = false;
- TRACE_EVENT_CATEGORY_GROUP_ENABLED(
- TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
- &frame_tracing_enabled);
- if (frame_tracing_enabled) {
- state->BeginDictionary("frame_source_");
- frame_source_->AsValueInto(state);
- state->EndDictionary();
- }
-
- state->BeginDictionary("scheduler_state");
- state->SetDouble("time_until_anticipated_draw_time_ms",
- (AnticipatedDrawTime() - Now()).InMillisecondsF());
- state->SetDouble("estimated_parent_draw_time_ms",
- estimated_parent_draw_time_.InMillisecondsF());
- state->SetBoolean("last_set_needs_begin_frame_",
- frame_source_->NeedsBeginFrames());
- state->SetInteger("begin_retro_frame_args_", begin_retro_frame_args_.size());
- state->SetBoolean("begin_retro_frame_task_",
- !begin_retro_frame_task_.IsCancelled());
- state->SetBoolean("begin_impl_frame_deadline_task_",
- !begin_impl_frame_deadline_task_.IsCancelled());
- state->SetBoolean("poll_for_draw_triggers_task_",
- !poll_for_draw_triggers_task_.IsCancelled());
- state->SetBoolean("advance_commit_state_task_",
- !advance_commit_state_task_.IsCancelled());
- state->BeginDictionary("begin_impl_frame_args");
- begin_impl_frame_args_.AsValueInto(state);
- state->EndDictionary();
-
- base::TimeTicks now = Now();
- base::TimeTicks frame_time = begin_impl_frame_args_.frame_time;
- base::TimeTicks deadline = begin_impl_frame_args_.deadline;
- base::TimeDelta interval = begin_impl_frame_args_.interval;
- state->BeginDictionary("major_timestamps_in_ms");
- state->SetDouble("0_interval", interval.InMillisecondsF());
- state->SetDouble("1_now_to_deadline", (deadline - now).InMillisecondsF());
- state->SetDouble("2_frame_time_to_now", (now - frame_time).InMillisecondsF());
- state->SetDouble("3_frame_time_to_deadline",
- (deadline - frame_time).InMillisecondsF());
- state->SetDouble("4_now", (now - base::TimeTicks()).InMillisecondsF());
- state->SetDouble("5_frame_time",
- (frame_time - base::TimeTicks()).InMillisecondsF());
- state->SetDouble("6_deadline",
- (deadline - base::TimeTicks()).InMillisecondsF());
- state->EndDictionary();
-
- state->EndDictionary();
-
- state->BeginDictionary("client_state");
- state->SetDouble("draw_duration_estimate_ms",
- client_->DrawDurationEstimate().InMillisecondsF());
- state->SetDouble(
- "begin_main_frame_to_commit_duration_estimate_ms",
- client_->BeginMainFrameToCommitDurationEstimate().InMillisecondsF());
- state->SetDouble(
- "commit_to_activate_duration_estimate_ms",
- client_->CommitToActivateDurationEstimate().InMillisecondsF());
- state->EndDictionary();
-}
-
-bool Scheduler::CanCommitAndActivateBeforeDeadline() const {
- // Check if the main thread computation and commit can be finished before the
- // impl thread's deadline.
- base::TimeTicks estimated_draw_time =
- begin_impl_frame_args_.frame_time +
- client_->BeginMainFrameToCommitDurationEstimate() +
- client_->CommitToActivateDurationEstimate();
-
- TRACE_EVENT2(
- TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
- "CanCommitAndActivateBeforeDeadline",
- "time_left_after_drawing_ms",
- (begin_impl_frame_args_.deadline - estimated_draw_time).InMillisecondsF(),
- "state",
- AsValue());
-
- return estimated_draw_time < begin_impl_frame_args_.deadline;
-}
-
-bool Scheduler::IsBeginMainFrameSentOrStarted() const {
- return (state_machine_.commit_state() ==
- SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT ||
- state_machine_.commit_state() ==
- SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED);
-}
-
-} // namespace cc
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