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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// Copyright 2020 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/performance_manager/execution_context_priority/inherit_client_priority_voter.h"
#include <utility>
#include "base/auto_reset.h"
#include "components/performance_manager/public/execution_context/execution_context.h"
#include "components/performance_manager/public/execution_context/execution_context_registry.h"
#include "components/performance_manager/public/graph/graph.h"
namespace performance_manager {
namespace execution_context_priority {
namespace {
const execution_context::ExecutionContext* GetExecutionContext(
const FrameNode* frame_node) {
return execution_context::ExecutionContextRegistry::GetFromGraph(
frame_node->GetGraph())
->GetExecutionContextForFrameNode(frame_node);
}
const execution_context::ExecutionContext* GetExecutionContext(
const WorkerNode* worker_node) {
return execution_context::ExecutionContextRegistry::GetFromGraph(
worker_node->GetGraph())
->GetExecutionContextForWorkerNode(worker_node);
}
} // namespace
// InheritClientPriorityVoter ------------------------------------------
// static
const char InheritClientPriorityVoter::kPriorityInheritedReason[] =
"Priority inherited.";
InheritClientPriorityVoter::InheritClientPriorityVoter() = default;
InheritClientPriorityVoter::~InheritClientPriorityVoter() = default;
void InheritClientPriorityVoter::SetVotingChannel(
VotingChannel voting_channel) {
DCHECK(voting_channel.IsValid());
max_vote_aggregator_.SetUpstreamVotingChannel(std::move(voting_channel));
}
void InheritClientPriorityVoter::OnFrameNodeAdded(const FrameNode* frame_node) {
bool inserted = voting_channels_
.emplace(GetExecutionContext(frame_node),
max_vote_aggregator_.GetVotingChannel())
.second;
DCHECK(inserted);
DCHECK(frame_node->GetChildWorkerNodes().empty());
}
void InheritClientPriorityVoter::OnBeforeFrameNodeRemoved(
const FrameNode* frame_node) {
DCHECK(frame_node->GetChildWorkerNodes().empty());
size_t removed = voting_channels_.erase(GetExecutionContext(frame_node));
DCHECK_EQ(removed, 1u);
}
void InheritClientPriorityVoter::OnPriorityAndReasonChanged(
const FrameNode* frame_node,
const PriorityAndReason& previous_value) {
// The priority of a frame changed. All its children must inherit the new
// priority.
auto it = voting_channels_.find(GetExecutionContext(frame_node));
// Unknown |frame_node|. Just ignore it until we get notified of its existence
// via OnFrameNodeAdded(). This can happen because another voter received the
// OnFrameNodeAdded() call first and thus was able to change its priority very
// early.
if (it == voting_channels_.end())
return;
auto& voting_channel = it->second;
const Vote inherited_vote(frame_node->GetPriorityAndReason().priority(),
kPriorityInheritedReason);
for (const WorkerNode* child_worker_node :
frame_node->GetChildWorkerNodes()) {
const ExecutionContext* child_execution_context =
GetExecutionContext(child_worker_node);
voting_channel.ChangeVote(child_execution_context, inherited_vote);
}
}
void InheritClientPriorityVoter::OnWorkerNodeAdded(
const WorkerNode* worker_node) {
bool inserted = voting_channels_
.emplace(GetExecutionContext(worker_node),
max_vote_aggregator_.GetVotingChannel())
.second;
DCHECK(inserted);
DCHECK(worker_node->GetChildWorkers().empty());
}
void InheritClientPriorityVoter::OnBeforeWorkerNodeRemoved(
const WorkerNode* worker_node) {
DCHECK(worker_node->GetChildWorkers().empty());
size_t removed = voting_channels_.erase(GetExecutionContext(worker_node));
DCHECK_EQ(removed, 1u);
}
void InheritClientPriorityVoter::OnClientFrameAdded(
const WorkerNode* worker_node,
const FrameNode* client_frame_node) {
// |worker_node| is now the child of |client_frame_node|. It must inherit its
// priority.
// Get the voting channel for the client.
auto it = voting_channels_.find(GetExecutionContext(client_frame_node));
DCHECK(it != voting_channels_.end());
auto* voting_channel = &it->second;
const Vote inherited_vote(
client_frame_node->GetPriorityAndReason().priority(),
kPriorityInheritedReason);
voting_channel->SubmitVote(GetExecutionContext(worker_node), inherited_vote);
}
void InheritClientPriorityVoter::OnBeforeClientFrameRemoved(
const WorkerNode* worker_node,
const FrameNode* client_frame_node) {
// |worker_node| is no longer the child of |client_frame_node|. The inherited
// vote must be invalidated.
// Get the voting channel for the client.
auto it = voting_channels_.find(GetExecutionContext(client_frame_node));
DCHECK(it != voting_channels_.end());
auto* voting_channel = &it->second;
voting_channel->InvalidateVote(GetExecutionContext(worker_node));
}
void InheritClientPriorityVoter::OnClientWorkerAdded(
const WorkerNode* worker_node,
const WorkerNode* client_worker_node) {
// |worker_node| is now the child of |client_worker_node|. It must inherit its
// priority.
// Get the voting channel for the client.
auto it = voting_channels_.find(GetExecutionContext(client_worker_node));
DCHECK(it != voting_channels_.end());
auto* voting_channel = &it->second;
const Vote inherited_vote(
client_worker_node->GetPriorityAndReason().priority(),
kPriorityInheritedReason);
voting_channel->SubmitVote(GetExecutionContext(worker_node), inherited_vote);
}
void InheritClientPriorityVoter::OnBeforeClientWorkerRemoved(
const WorkerNode* worker_node,
const WorkerNode* client_worker_node) {
// |worker_node| is no longer the child of |client_worker_node|. The inherited
// vote must be invalidated.
// Get the voting channel for the client.
auto it = voting_channels_.find(GetExecutionContext(client_worker_node));
DCHECK(it != voting_channels_.end());
auto* voting_channel = &it->second;
voting_channel->InvalidateVote(GetExecutionContext(worker_node));
}
void InheritClientPriorityVoter::OnPriorityAndReasonChanged(
const WorkerNode* worker_node,
const PriorityAndReason& previous_value) {
// The priority of a worker changed. All its children must inherit the new
// priority.
auto it = voting_channels_.find(GetExecutionContext(worker_node));
// Unknown |worker_node|. Just ignore it until we get notified of its
// existence via OnWorkerNodeAdded().
if (it == voting_channels_.end())
return;
auto& voting_channel = it->second;
const Vote inherited_vote(worker_node->GetPriorityAndReason().priority(),
kPriorityInheritedReason);
for (const WorkerNode* child_worker_node : worker_node->GetChildWorkers()) {
const ExecutionContext* child_execution_context =
GetExecutionContext(child_worker_node);
voting_channel.ChangeVote(child_execution_context, inherited_vote);
}
}
} // namespace execution_context_priority
} // namespace performance_manager
|
