components/scheduler/renderer/renderer_scheduler.cc - Issue 2118903002: scheduler: Move the Blink scheduler into Blink

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Issue 2118903002: scheduler: Move the Blink scheduler into Blink (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Really fixed the test failure this time Created 4 years, 4 months ago

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1 // Copyright 2014 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 #include "components/scheduler/renderer/renderer_scheduler.h"

6

7 #include "base/command_line.h"

8 #include "base/feature_list.h"

9 #include "base/memory/ptr_util.h"

10 #include "base/message_loop/message_loop.h"

11 #include "base/metrics/field_trial.h"

12 #include "base/time/default_tick_clock.h"

13 #include "base/trace_event/trace_event.h"

14 #include "base/trace_event/trace_event_impl.h"

15 #include "components/scheduler/child/scheduler_tqm_delegate_impl.h"

16 #include "components/scheduler/common/scheduler_switches.h"

17 #include "components/scheduler/renderer/renderer_scheduler_impl.h"

18

19 namespace scheduler {

20 namespace {

21 const base::Feature kExpensiveTaskBlockingPolicyFeature{

22 "SchedulerExpensiveTaskBlocking", base::FEATURE_ENABLED_BY_DEFAULT};

23 }

24

25 RendererScheduler::RendererScheduler() {

26 }

27

28 RendererScheduler::~RendererScheduler() {

29 }

30

31 RendererScheduler::RAILModeObserver::~RAILModeObserver() = default;

32

33 // static

34 std::unique_ptr<RendererScheduler> RendererScheduler::Create() {

35 // Ensure worker.scheduler, worker.scheduler.debug and

36 // renderer.scheduler.debug appear as an option in about://tracing

37 base::trace_event::TraceLog::GetCategoryGroupEnabled(

38 TRACE_DISABLED_BY_DEFAULT("worker.scheduler"));

39 base::trace_event::TraceLog::GetCategoryGroupEnabled(

40 TRACE_DISABLED_BY_DEFAULT("worker.scheduler.debug"));

41 base::trace_event::TraceLog::GetCategoryGroupEnabled(

42 TRACE_DISABLED_BY_DEFAULT("renderer.scheduler.debug"));

43

44 base::MessageLoop* message_loop = base::MessageLoop::current();

45 std::unique_ptr<RendererSchedulerImpl> scheduler(

46 new RendererSchedulerImpl(SchedulerTqmDelegateImpl::Create(

47 message_loop, base::WrapUnique(new base::DefaultTickClock()))));

48

49 // Runtime features are not currently available in html_viewer.

50 if (base::FeatureList::GetInstance()) {

51 bool blocking_allowed =

52 base::FeatureList::IsEnabled(kExpensiveTaskBlockingPolicyFeature);

53 // Also check the old style FieldTrial API for perf waterfall compatibility.

54 const std::string group_name = base::FieldTrialList::FindFullName(

55 kExpensiveTaskBlockingPolicyFeature.name);

56 blocking_allowed \|= base::StartsWith(group_name, "Enabled",

57 base::CompareCase::INSENSITIVE_ASCII);

58 scheduler->SetExpensiveTaskBlockingAllowed(blocking_allowed);

59 }

60 return base::WrapUnique<RendererScheduler>(scheduler.release());

61 }

62

63 // static

64 const char* RendererScheduler::InputEventStateToString(

65 InputEventState input_event_state) {

66 switch (input_event_state) {

67 case InputEventState::EVENT_CONSUMED_BY_COMPOSITOR:

68 return "event_consumed_by_compositor";

69 case InputEventState::EVENT_FORWARDED_TO_MAIN_THREAD:

70 return "event_forwarded_to_main_thread";

71 default:

72 NOTREACHED();

73 return nullptr;

74 }

75 }

76

77 } // namespace scheduler

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