blob: ef04e64744c5098b00d22663f5d45c8bde54b17a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
// Copyright 2016 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/worker/compositor_thread_scheduler.h"
#include <memory>
#include <utility>
#include "base/callback.h"
#include "base/task/sequence_manager/task_queue.h"
#include "base/threading/thread.h"
#include "base/threading/thread_task_runner_handle.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/renderer/platform/scheduler/common/features.h"
#include "third_party/blink/renderer/platform/scheduler/common/scheduler_helper.h"
namespace blink {
namespace scheduler {
namespace {
CompositorThreadScheduler* g_compositor_thread_scheduler = nullptr;
} // namespace
// static
WebThreadScheduler* WebThreadScheduler::CompositorThreadScheduler() {
return g_compositor_thread_scheduler;
}
CompositorThreadScheduler::CompositorThreadScheduler(
base::sequence_manager::SequenceManager* sequence_manager)
: NonMainThreadSchedulerImpl(sequence_manager,
TaskType::kCompositorThreadTaskQueueDefault),
input_task_queue_(
base::FeatureList::IsEnabled(kHighPriorityInputOnCompositorThread)
? helper()->NewTaskQueue(
base::sequence_manager::TaskQueue::Spec("input_tq")
.SetShouldMonitorQuiescence(true))
: nullptr),
input_task_runner_(input_task_queue_
? input_task_queue_->CreateTaskRunner(
TaskType::kCompositorThreadTaskQueueInput)
: nullptr),
compositor_metrics_helper_(helper()->HasCPUTimingForEachTask()) {
if (input_task_queue_) {
input_task_queue_->SetQueuePriority(
base::sequence_manager::TaskQueue::QueuePriority::kHighestPriority);
}
DCHECK(!g_compositor_thread_scheduler);
g_compositor_thread_scheduler = this;
}
CompositorThreadScheduler::~CompositorThreadScheduler() {
DCHECK_EQ(g_compositor_thread_scheduler, this);
g_compositor_thread_scheduler = nullptr;
}
scoped_refptr<NonMainThreadTaskQueue>
CompositorThreadScheduler::DefaultTaskQueue() {
return helper()->DefaultNonMainThreadTaskQueue();
}
void CompositorThreadScheduler::InitImpl() {}
void CompositorThreadScheduler::OnTaskCompleted(
NonMainThreadTaskQueue* worker_task_queue,
const base::sequence_manager::Task& task,
base::sequence_manager::TaskQueue::TaskTiming* task_timing,
base::sequence_manager::LazyNow* lazy_now) {
task_timing->RecordTaskEnd(lazy_now);
compositor_metrics_helper_.RecordTaskMetrics(worker_task_queue, task,
*task_timing);
}
scoped_refptr<scheduler::SingleThreadIdleTaskRunner>
CompositorThreadScheduler::IdleTaskRunner() {
// TODO(flackr): This posts idle tasks as regular tasks. We need to create
// an idle task runner with the semantics we want for the compositor thread
// which runs them after the current frame has been drawn before the next
// vsync. https://crbug.com/609532
return base::MakeRefCounted<SingleThreadIdleTaskRunner>(
helper()->DefaultTaskRunner(), this);
}
scoped_refptr<base::SingleThreadTaskRunner>
CompositorThreadScheduler::InputTaskRunner() {
if (input_task_runner_)
return input_task_runner_;
return helper()->DefaultTaskRunner();
}
scoped_refptr<base::SingleThreadTaskRunner>
CompositorThreadScheduler::V8TaskRunner() {
NOTREACHED();
return nullptr;
}
scoped_refptr<base::SingleThreadTaskRunner>
CompositorThreadScheduler::CompositorTaskRunner() {
NOTREACHED();
return nullptr;
}
scoped_refptr<base::SingleThreadTaskRunner>
CompositorThreadScheduler::IPCTaskRunner() {
NOTREACHED();
return nullptr;
}
bool CompositorThreadScheduler::CanExceedIdleDeadlineIfRequired() const {
return false;
}
bool CompositorThreadScheduler::ShouldYieldForHighPriorityWork() {
return false;
}
void CompositorThreadScheduler::AddTaskObserver(
base::TaskObserver* task_observer) {
helper()->AddTaskObserver(task_observer);
}
void CompositorThreadScheduler::RemoveTaskObserver(
base::TaskObserver* task_observer) {
helper()->RemoveTaskObserver(task_observer);
}
void CompositorThreadScheduler::Shutdown() {
input_task_queue_->ShutdownTaskQueue();
}
void CompositorThreadScheduler::OnIdleTaskPosted() {}
base::TimeTicks CompositorThreadScheduler::WillProcessIdleTask() {
// TODO(flackr): Return the next frame time as the deadline instead.
// TODO(flackr): Ensure that oilpan GC does happen on the compositor thread
// even though we will have no long idle periods. https://crbug.com/609531
return base::TimeTicks::Now() + base::TimeDelta::FromMillisecondsD(16.7);
}
void CompositorThreadScheduler::DidProcessIdleTask() {}
base::TimeTicks CompositorThreadScheduler::NowTicks() {
return base::TimeTicks::Now();
}
} // namespace scheduler
} // namespace blink
|
