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// Copyright 2014 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 "components/scheduler/renderer/renderer_scheduler.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/time/default_tick_clock.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_impl.h"
#include "components/scheduler/child/scheduler_tqm_delegate_impl.h"
#include "components/scheduler/common/scheduler_switches.h"
#include "components/scheduler/renderer/renderer_scheduler_impl.h"
namespace scheduler {
namespace {
const base::Feature kExpensiveTaskBlockingPolicyFeature{
"SchedulerExpensiveTaskBlocking", base::FEATURE_DISABLED_BY_DEFAULT};
}
RendererScheduler::RendererScheduler() {
}
RendererScheduler::~RendererScheduler() {
}
// static
scoped_ptr<RendererScheduler> RendererScheduler::Create() {
// Ensure worker.scheduler, worker.scheduler.debug and
// renderer.scheduler.debug appear as an option in about://tracing
base::trace_event::TraceLog::GetCategoryGroupEnabled(
TRACE_DISABLED_BY_DEFAULT("worker.scheduler"));
base::trace_event::TraceLog::GetCategoryGroupEnabled(
TRACE_DISABLED_BY_DEFAULT("worker.scheduler.debug"));
base::trace_event::TraceLog::GetCategoryGroupEnabled(
TRACE_DISABLED_BY_DEFAULT("renderer.scheduler.debug"));
base::MessageLoop* message_loop = base::MessageLoop::current();
scoped_ptr<RendererSchedulerImpl> scheduler(
new RendererSchedulerImpl(SchedulerTqmDelegateImpl::Create(
message_loop, make_scoped_ptr(new base::DefaultTickClock()))));
// Runtime features are not currently available in html_viewer.
if (base::FeatureList::GetInstance()) {
bool blocking_allowed =
base::FeatureList::IsEnabled(kExpensiveTaskBlockingPolicyFeature);
// Also check the old style FieldTrial API for perf waterfall compatibility.
const std::string group_name = base::FieldTrialList::FindFullName(
kExpensiveTaskBlockingPolicyFeature.name);
blocking_allowed |= base::StartsWith(group_name, "Enabled",
base::CompareCase::INSENSITIVE_ASCII);
scheduler->SetExpensiveTaskBlockingAllowed(blocking_allowed);
}
return make_scoped_ptr<RendererScheduler>(scheduler.release());
}
// static
const char* RendererScheduler::UseCaseToString(UseCase use_case) {
switch (use_case) {
case UseCase::NONE:
return "none";
case UseCase::COMPOSITOR_GESTURE:
return "compositor_gesture";
case UseCase::MAIN_THREAD_GESTURE:
return "main_thread_gesture";
case UseCase::SYNCHRONIZED_GESTURE:
return "synchronized_gesture";
case UseCase::TOUCHSTART:
return "touchstart";
case UseCase::LOADING:
return "loading";
default:
NOTREACHED();
return nullptr;
}
}
// static
const char* RendererScheduler::InputEventStateToString(
InputEventState input_event_state) {
switch (input_event_state) {
case InputEventState::EVENT_CONSUMED_BY_COMPOSITOR:
return "event_consumed_by_compositor";
case InputEventState::EVENT_FORWARDED_TO_MAIN_THREAD:
return "event_forwarded_to_main_thread";
default:
NOTREACHED();
return nullptr;
}
}
} // namespace scheduler
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