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| 1 // Copyright 2015 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/child/idle_helper.h" | |
| 6 | |
| 7 #include "base/time/time.h" | |
| 8 #include "base/trace_event/trace_event.h" | |
| 9 #include "base/trace_event/trace_event_argument.h" | |
| 10 #include "components/scheduler/base/real_time_domain.h" | |
| 11 #include "components/scheduler/base/task_queue.h" | |
| 12 #include "components/scheduler/base/task_queue_manager.h" | |
| 13 #include "components/scheduler/child/scheduler_helper.h" | |
| 14 #include "components/scheduler/child/scheduler_tqm_delegate.h" | |
| 15 | |
| 16 namespace scheduler { | |
| 17 | |
| 18 IdleHelper::IdleHelper( | |
| 19 SchedulerHelper* helper, | |
| 20 Delegate* delegate, | |
| 21 const char* tracing_category, | |
| 22 const char* disabled_by_default_tracing_category, | |
| 23 const char* idle_period_tracing_name, | |
| 24 base::TimeDelta required_quiescence_duration_before_long_idle_period) | |
| 25 : helper_(helper), | |
| 26 delegate_(delegate), | |
| 27 idle_queue_( | |
| 28 helper_->NewTaskQueue(TaskQueue::Spec("idle_tq").SetPumpPolicy( | |
| 29 TaskQueue::PumpPolicy::MANUAL))), | |
| 30 state_(helper, | |
| 31 delegate, | |
| 32 tracing_category, | |
| 33 disabled_by_default_tracing_category, | |
| 34 idle_period_tracing_name), | |
| 35 required_quiescence_duration_before_long_idle_period_( | |
| 36 required_quiescence_duration_before_long_idle_period), | |
| 37 disabled_by_default_tracing_category_( | |
| 38 disabled_by_default_tracing_category), | |
| 39 weak_factory_(this) { | |
| 40 weak_idle_helper_ptr_ = weak_factory_.GetWeakPtr(); | |
| 41 enable_next_long_idle_period_closure_.Reset( | |
| 42 base::Bind(&IdleHelper::EnableLongIdlePeriod, weak_idle_helper_ptr_)); | |
| 43 on_idle_task_posted_closure_.Reset(base::Bind( | |
| 44 &IdleHelper::OnIdleTaskPostedOnMainThread, weak_idle_helper_ptr_)); | |
| 45 | |
| 46 idle_task_runner_ = make_scoped_refptr(new SingleThreadIdleTaskRunner( | |
| 47 idle_queue_, helper_->ControlAfterWakeUpTaskRunner(), this, | |
| 48 tracing_category)); | |
| 49 | |
| 50 idle_queue_->SetQueueEnabled(false); | |
| 51 idle_queue_->SetQueuePriority(TaskQueue::BEST_EFFORT_PRIORITY); | |
| 52 | |
| 53 helper_->AddTaskObserver(this); | |
| 54 } | |
| 55 | |
| 56 IdleHelper::~IdleHelper() { | |
| 57 helper_->RemoveTaskObserver(this); | |
| 58 } | |
| 59 | |
| 60 IdleHelper::Delegate::Delegate() { | |
| 61 } | |
| 62 | |
| 63 IdleHelper::Delegate::~Delegate() { | |
| 64 } | |
| 65 | |
| 66 scoped_refptr<SingleThreadIdleTaskRunner> IdleHelper::IdleTaskRunner() { | |
| 67 helper_->CheckOnValidThread(); | |
| 68 return idle_task_runner_; | |
| 69 } | |
| 70 | |
| 71 IdleHelper::IdlePeriodState IdleHelper::ComputeNewLongIdlePeriodState( | |
| 72 const base::TimeTicks now, | |
| 73 base::TimeDelta* next_long_idle_period_delay_out) { | |
| 74 helper_->CheckOnValidThread(); | |
| 75 | |
| 76 if (!delegate_->CanEnterLongIdlePeriod(now, | |
| 77 next_long_idle_period_delay_out)) { | |
| 78 return IdlePeriodState::NOT_IN_IDLE_PERIOD; | |
| 79 } | |
| 80 | |
| 81 base::TimeTicks next_pending_delayed_task; | |
| 82 base::TimeDelta max_long_idle_period_duration = | |
| 83 base::TimeDelta::FromMilliseconds(kMaximumIdlePeriodMillis); | |
| 84 base::TimeDelta long_idle_period_duration; | |
| 85 if (helper_->real_time_domain()->NextScheduledRunTime( | |
| 86 &next_pending_delayed_task)) { | |
| 87 // Limit the idle period duration to be before the next pending task. | |
| 88 long_idle_period_duration = std::min(next_pending_delayed_task - now, | |
| 89 max_long_idle_period_duration); | |
| 90 } else { | |
| 91 long_idle_period_duration = max_long_idle_period_duration; | |
| 92 } | |
| 93 | |
| 94 if (long_idle_period_duration >= | |
| 95 base::TimeDelta::FromMilliseconds(kMinimumIdlePeriodDurationMillis)) { | |
| 96 *next_long_idle_period_delay_out = long_idle_period_duration; | |
| 97 if (!idle_queue_->HasPendingImmediateWork()) { | |
| 98 return IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED; | |
| 99 } else if (long_idle_period_duration == max_long_idle_period_duration) { | |
| 100 return IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE; | |
| 101 } else { | |
| 102 return IdlePeriodState::IN_LONG_IDLE_PERIOD; | |
| 103 } | |
| 104 } else { | |
| 105 // If we can't start the idle period yet then try again after wakeup. | |
| 106 *next_long_idle_period_delay_out = base::TimeDelta::FromMilliseconds( | |
| 107 kRetryEnableLongIdlePeriodDelayMillis); | |
| 108 return IdlePeriodState::NOT_IN_IDLE_PERIOD; | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 bool IdleHelper::ShouldWaitForQuiescence() { | |
| 113 helper_->CheckOnValidThread(); | |
| 114 | |
| 115 if (helper_->IsShutdown()) | |
| 116 return false; | |
| 117 | |
| 118 if (required_quiescence_duration_before_long_idle_period_ == | |
| 119 base::TimeDelta()) | |
| 120 return false; | |
| 121 | |
| 122 bool system_is_quiescent = helper_->GetAndClearSystemIsQuiescentBit(); | |
| 123 TRACE_EVENT1(disabled_by_default_tracing_category_, "ShouldWaitForQuiescence", | |
| 124 "system_is_quiescent", system_is_quiescent); | |
| 125 return !system_is_quiescent; | |
| 126 } | |
| 127 | |
| 128 void IdleHelper::EnableLongIdlePeriod() { | |
| 129 TRACE_EVENT0(disabled_by_default_tracing_category_, "EnableLongIdlePeriod"); | |
| 130 helper_->CheckOnValidThread(); | |
| 131 if (helper_->IsShutdown()) | |
| 132 return; | |
| 133 | |
| 134 // End any previous idle period. | |
| 135 EndIdlePeriod(); | |
| 136 | |
| 137 if (ShouldWaitForQuiescence()) { | |
| 138 helper_->ControlTaskRunner()->PostDelayedTask( | |
| 139 FROM_HERE, enable_next_long_idle_period_closure_.callback(), | |
| 140 required_quiescence_duration_before_long_idle_period_); | |
| 141 delegate_->IsNotQuiescent(); | |
| 142 return; | |
| 143 } | |
| 144 | |
| 145 base::TimeTicks now(helper_->scheduler_tqm_delegate()->NowTicks()); | |
| 146 base::TimeDelta next_long_idle_period_delay; | |
| 147 IdlePeriodState new_idle_period_state = | |
| 148 ComputeNewLongIdlePeriodState(now, &next_long_idle_period_delay); | |
| 149 if (IsInIdlePeriod(new_idle_period_state)) { | |
| 150 StartIdlePeriod(new_idle_period_state, now, | |
| 151 now + next_long_idle_period_delay); | |
| 152 } else { | |
| 153 // Otherwise wait for the next long idle period delay before trying again. | |
| 154 helper_->ControlTaskRunner()->PostDelayedTask( | |
| 155 FROM_HERE, enable_next_long_idle_period_closure_.callback(), | |
| 156 next_long_idle_period_delay); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 void IdleHelper::StartIdlePeriod(IdlePeriodState new_state, | |
| 161 base::TimeTicks now, | |
| 162 base::TimeTicks idle_period_deadline) { | |
| 163 DCHECK_GT(idle_period_deadline, now); | |
| 164 helper_->CheckOnValidThread(); | |
| 165 DCHECK(IsInIdlePeriod(new_state)); | |
| 166 | |
| 167 base::TimeDelta idle_period_duration(idle_period_deadline - now); | |
| 168 if (idle_period_duration < | |
| 169 base::TimeDelta::FromMilliseconds(kMinimumIdlePeriodDurationMillis)) { | |
| 170 TRACE_EVENT1(disabled_by_default_tracing_category_, | |
| 171 "NotStartingIdlePeriodBecauseDeadlineIsTooClose", | |
| 172 "idle_period_duration_ms", | |
| 173 idle_period_duration.InMillisecondsF()); | |
| 174 return; | |
| 175 } | |
| 176 | |
| 177 TRACE_EVENT0(disabled_by_default_tracing_category_, "StartIdlePeriod"); | |
| 178 idle_queue_->SetQueueEnabled(true); | |
| 179 idle_queue_->PumpQueue(true); | |
| 180 | |
| 181 state_.UpdateState(new_state, idle_period_deadline, now); | |
| 182 } | |
| 183 | |
| 184 void IdleHelper::EndIdlePeriod() { | |
| 185 helper_->CheckOnValidThread(); | |
| 186 TRACE_EVENT0(disabled_by_default_tracing_category_, "EndIdlePeriod"); | |
| 187 | |
| 188 enable_next_long_idle_period_closure_.Cancel(); | |
| 189 on_idle_task_posted_closure_.Cancel(); | |
| 190 | |
| 191 // If we weren't already within an idle period then early-out. | |
| 192 if (!IsInIdlePeriod(state_.idle_period_state())) | |
| 193 return; | |
| 194 | |
| 195 idle_queue_->SetQueueEnabled(false); | |
| 196 state_.UpdateState(IdlePeriodState::NOT_IN_IDLE_PERIOD, base::TimeTicks(), | |
| 197 base::TimeTicks()); | |
| 198 } | |
| 199 | |
| 200 void IdleHelper::WillProcessTask(const base::PendingTask& pending_task) { | |
| 201 } | |
| 202 | |
| 203 void IdleHelper::DidProcessTask(const base::PendingTask& pending_task) { | |
| 204 helper_->CheckOnValidThread(); | |
| 205 TRACE_EVENT0(disabled_by_default_tracing_category_, "DidProcessTask"); | |
| 206 if (IsInIdlePeriod(state_.idle_period_state()) && | |
| 207 state_.idle_period_state() != | |
| 208 IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED && | |
| 209 helper_->scheduler_tqm_delegate()->NowTicks() >= | |
| 210 state_.idle_period_deadline()) { | |
| 211 // If the idle period deadline has now been reached, either end the idle | |
| 212 // period or trigger a new long-idle period. | |
| 213 if (IsInLongIdlePeriod(state_.idle_period_state())) { | |
| 214 EnableLongIdlePeriod(); | |
| 215 } else { | |
| 216 DCHECK(IdlePeriodState::IN_SHORT_IDLE_PERIOD == | |
| 217 state_.idle_period_state()); | |
| 218 EndIdlePeriod(); | |
| 219 } | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 void IdleHelper::UpdateLongIdlePeriodStateAfterIdleTask() { | |
| 224 helper_->CheckOnValidThread(); | |
| 225 DCHECK(IsInLongIdlePeriod(state_.idle_period_state())); | |
| 226 TRACE_EVENT0(disabled_by_default_tracing_category_, | |
| 227 "UpdateLongIdlePeriodStateAfterIdleTask"); | |
| 228 | |
| 229 if (!idle_queue_->HasPendingImmediateWork()) { | |
| 230 // If there are no more idle tasks then pause long idle period ticks until a | |
| 231 // new idle task is posted. | |
| 232 state_.UpdateState(IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED, | |
| 233 state_.idle_period_deadline(), base::TimeTicks()); | |
| 234 } else if (idle_queue_->NeedsPumping()) { | |
| 235 // If there is still idle work to do then just start the next idle period. | |
| 236 base::TimeDelta next_long_idle_period_delay; | |
| 237 if (state_.idle_period_state() == | |
| 238 IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE) { | |
| 239 // If we are in a max deadline long idle period then start the next | |
| 240 // idle period immediately. | |
| 241 next_long_idle_period_delay = base::TimeDelta(); | |
| 242 } else { | |
| 243 // Otherwise ensure that we kick the scheduler at the right time to | |
| 244 // initiate the next idle period. | |
| 245 next_long_idle_period_delay = std::max( | |
| 246 base::TimeDelta(), state_.idle_period_deadline() - | |
| 247 helper_->scheduler_tqm_delegate()->NowTicks()); | |
| 248 } | |
| 249 if (next_long_idle_period_delay.is_zero()) { | |
| 250 EnableLongIdlePeriod(); | |
| 251 } else { | |
| 252 helper_->ControlTaskRunner()->PostDelayedTask( | |
| 253 FROM_HERE, enable_next_long_idle_period_closure_.callback(), | |
| 254 next_long_idle_period_delay); | |
| 255 } | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 base::TimeTicks IdleHelper::CurrentIdleTaskDeadline() const { | |
| 260 helper_->CheckOnValidThread(); | |
| 261 return state_.idle_period_deadline(); | |
| 262 } | |
| 263 | |
| 264 void IdleHelper::OnIdleTaskPosted() { | |
| 265 TRACE_EVENT0(disabled_by_default_tracing_category_, "OnIdleTaskPosted"); | |
| 266 if (idle_task_runner_->RunsTasksOnCurrentThread()) { | |
| 267 OnIdleTaskPostedOnMainThread(); | |
| 268 } else { | |
| 269 helper_->ControlTaskRunner()->PostTask( | |
| 270 FROM_HERE, on_idle_task_posted_closure_.callback()); | |
| 271 } | |
| 272 } | |
| 273 | |
| 274 void IdleHelper::OnIdleTaskPostedOnMainThread() { | |
| 275 TRACE_EVENT0(disabled_by_default_tracing_category_, | |
| 276 "OnIdleTaskPostedOnMainThread"); | |
| 277 if (state_.idle_period_state() == | |
| 278 IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED) { | |
| 279 // Restart long idle period ticks. | |
| 280 helper_->ControlTaskRunner()->PostTask( | |
| 281 FROM_HERE, enable_next_long_idle_period_closure_.callback()); | |
| 282 } | |
| 283 } | |
| 284 | |
| 285 base::TimeTicks IdleHelper::WillProcessIdleTask() { | |
| 286 helper_->CheckOnValidThread(); | |
| 287 state_.TraceIdleIdleTaskStart(); | |
| 288 return CurrentIdleTaskDeadline(); | |
| 289 } | |
| 290 | |
| 291 void IdleHelper::DidProcessIdleTask() { | |
| 292 helper_->CheckOnValidThread(); | |
| 293 state_.TraceIdleIdleTaskEnd(); | |
| 294 if (IsInLongIdlePeriod(state_.idle_period_state())) { | |
| 295 UpdateLongIdlePeriodStateAfterIdleTask(); | |
| 296 } | |
| 297 } | |
| 298 | |
| 299 // static | |
| 300 bool IdleHelper::IsInIdlePeriod(IdlePeriodState state) { | |
| 301 return state != IdlePeriodState::NOT_IN_IDLE_PERIOD; | |
| 302 } | |
| 303 | |
| 304 // static | |
| 305 bool IdleHelper::IsInLongIdlePeriod(IdlePeriodState state) { | |
| 306 return state == IdlePeriodState::IN_LONG_IDLE_PERIOD || | |
| 307 state == IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE || | |
| 308 state == IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED; | |
| 309 } | |
| 310 | |
| 311 bool IdleHelper::CanExceedIdleDeadlineIfRequired() const { | |
| 312 TRACE_EVENT0(disabled_by_default_tracing_category_, | |
| 313 "CanExceedIdleDeadlineIfRequired"); | |
| 314 helper_->CheckOnValidThread(); | |
| 315 return state_.idle_period_state() == | |
| 316 IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE; | |
| 317 } | |
| 318 | |
| 319 IdleHelper::IdlePeriodState IdleHelper::SchedulerIdlePeriodState() const { | |
| 320 return state_.idle_period_state(); | |
| 321 } | |
| 322 | |
| 323 IdleHelper::State::State(SchedulerHelper* helper, | |
| 324 Delegate* delegate, | |
| 325 const char* tracing_category, | |
| 326 const char* disabled_by_default_tracing_category, | |
| 327 const char* idle_period_tracing_name) | |
| 328 : helper_(helper), | |
| 329 delegate_(delegate), | |
| 330 idle_period_state_(IdlePeriodState::NOT_IN_IDLE_PERIOD), | |
| 331 idle_period_trace_event_started_(false), | |
| 332 running_idle_task_for_tracing_(false), | |
| 333 tracing_category_(tracing_category), | |
| 334 disabled_by_default_tracing_category_( | |
| 335 disabled_by_default_tracing_category), | |
| 336 idle_period_tracing_name_(idle_period_tracing_name) { | |
| 337 } | |
| 338 | |
| 339 IdleHelper::State::~State() { | |
| 340 } | |
| 341 | |
| 342 IdleHelper::IdlePeriodState IdleHelper::State::idle_period_state() const { | |
| 343 helper_->CheckOnValidThread(); | |
| 344 return idle_period_state_; | |
| 345 } | |
| 346 | |
| 347 base::TimeTicks IdleHelper::State::idle_period_deadline() const { | |
| 348 helper_->CheckOnValidThread(); | |
| 349 return idle_period_deadline_; | |
| 350 } | |
| 351 | |
| 352 void IdleHelper::State::UpdateState(IdlePeriodState new_state, | |
| 353 base::TimeTicks new_deadline, | |
| 354 base::TimeTicks optional_now) { | |
| 355 IdlePeriodState old_idle_period_state = idle_period_state_; | |
| 356 | |
| 357 helper_->CheckOnValidThread(); | |
| 358 if (new_state == idle_period_state_) { | |
| 359 DCHECK_EQ(new_deadline, idle_period_deadline_); | |
| 360 return; | |
| 361 } | |
| 362 | |
| 363 bool is_tracing; | |
| 364 TRACE_EVENT_CATEGORY_GROUP_ENABLED(tracing_category_, &is_tracing); | |
| 365 if (is_tracing) { | |
| 366 base::TimeTicks now(optional_now.is_null() | |
| 367 ? helper_->scheduler_tqm_delegate()->NowTicks() | |
| 368 : optional_now); | |
| 369 TraceEventIdlePeriodStateChange( | |
| 370 new_state, running_idle_task_for_tracing_, idle_period_deadline_, now); | |
| 371 } | |
| 372 | |
| 373 idle_period_state_ = new_state; | |
| 374 idle_period_deadline_ = new_deadline; | |
| 375 | |
| 376 // Inform the delegate if we are starting or ending an idle period. | |
| 377 if (IsInIdlePeriod(new_state) && !IsInIdlePeriod(old_idle_period_state)) { | |
| 378 delegate_->OnIdlePeriodStarted(); | |
| 379 } else if (!IsInIdlePeriod(new_state) && | |
| 380 IsInIdlePeriod(old_idle_period_state)) { | |
| 381 delegate_->OnIdlePeriodEnded(); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 void IdleHelper::State::TraceIdleIdleTaskStart() { | |
| 386 helper_->CheckOnValidThread(); | |
| 387 | |
| 388 bool is_tracing; | |
| 389 TRACE_EVENT_CATEGORY_GROUP_ENABLED(tracing_category_, &is_tracing); | |
| 390 if (is_tracing) { | |
| 391 TraceEventIdlePeriodStateChange( | |
| 392 idle_period_state_, true, idle_period_deadline_, | |
| 393 base::TimeTicks::Now()); | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 void IdleHelper::State::TraceIdleIdleTaskEnd() { | |
| 398 helper_->CheckOnValidThread(); | |
| 399 | |
| 400 bool is_tracing; | |
| 401 TRACE_EVENT_CATEGORY_GROUP_ENABLED(tracing_category_, &is_tracing); | |
| 402 if (is_tracing) { | |
| 403 TraceEventIdlePeriodStateChange( | |
| 404 idle_period_state_, false, idle_period_deadline_, | |
| 405 base::TimeTicks::Now()); | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 void IdleHelper::State::TraceEventIdlePeriodStateChange( | |
| 410 IdlePeriodState new_state, | |
| 411 bool new_running_idle_task, | |
| 412 base::TimeTicks new_deadline, | |
| 413 base::TimeTicks now) { | |
| 414 TRACE_EVENT2(disabled_by_default_tracing_category_, "SetIdlePeriodState", | |
| 415 "old_state", | |
| 416 IdleHelper::IdlePeriodStateToString(idle_period_state_), | |
| 417 "new_state", IdleHelper::IdlePeriodStateToString(new_state)); | |
| 418 | |
| 419 if (idle_period_trace_event_started_ && running_idle_task_for_tracing_ && | |
| 420 !new_running_idle_task) { | |
| 421 running_idle_task_for_tracing_ = false; | |
| 422 if (!idle_period_deadline_.is_null() && now > idle_period_deadline_) { | |
| 423 TRACE_EVENT_ASYNC_STEP_INTO_WITH_TIMESTAMP0( | |
| 424 tracing_category_, idle_period_tracing_name_, this, | |
| 425 "DeadlineOverrun", | |
| 426 std::max(idle_period_deadline_, | |
| 427 last_idle_task_trace_time_).ToInternalValue()); | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 if (IsInIdlePeriod(new_state)) { | |
| 432 if (!idle_period_trace_event_started_) { | |
| 433 idle_period_trace_event_started_ = true; | |
| 434 TRACE_EVENT_ASYNC_BEGIN1( | |
| 435 tracing_category_, idle_period_tracing_name_, this, | |
| 436 "idle_period_length_ms", (new_deadline - now).ToInternalValue()); | |
| 437 } | |
| 438 | |
| 439 if (new_running_idle_task) { | |
| 440 last_idle_task_trace_time_ = now; | |
| 441 running_idle_task_for_tracing_ = true; | |
| 442 TRACE_EVENT_ASYNC_STEP_INTO0( | |
| 443 tracing_category_, idle_period_tracing_name_, this, | |
| 444 "RunningIdleTask"); | |
| 445 } else if (new_state == IdlePeriodState::IN_SHORT_IDLE_PERIOD) { | |
| 446 TRACE_EVENT_ASYNC_STEP_INTO0( | |
| 447 tracing_category_, idle_period_tracing_name_, this, | |
| 448 "ShortIdlePeriod"); | |
| 449 } else if (IsInLongIdlePeriod(new_state) && | |
| 450 new_state != IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED) { | |
| 451 TRACE_EVENT_ASYNC_STEP_INTO0( | |
| 452 tracing_category_, idle_period_tracing_name_, this, | |
| 453 "LongIdlePeriod"); | |
| 454 } else if (new_state == IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED) { | |
| 455 TRACE_EVENT_ASYNC_STEP_INTO0( | |
| 456 tracing_category_, idle_period_tracing_name_, this, | |
| 457 "LongIdlePeriodPaused"); | |
| 458 } | |
| 459 } else if (idle_period_trace_event_started_) { | |
| 460 idle_period_trace_event_started_ = false; | |
| 461 TRACE_EVENT_ASYNC_END0(tracing_category_, idle_period_tracing_name_, this); | |
| 462 } | |
| 463 } | |
| 464 | |
| 465 // static | |
| 466 const char* IdleHelper::IdlePeriodStateToString( | |
| 467 IdlePeriodState idle_period_state) { | |
| 468 switch (idle_period_state) { | |
| 469 case IdlePeriodState::NOT_IN_IDLE_PERIOD: | |
| 470 return "not_in_idle_period"; | |
| 471 case IdlePeriodState::IN_SHORT_IDLE_PERIOD: | |
| 472 return "in_short_idle_period"; | |
| 473 case IdlePeriodState::IN_LONG_IDLE_PERIOD: | |
| 474 return "in_long_idle_period"; | |
| 475 case IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE: | |
| 476 return "in_long_idle_period_with_max_deadline"; | |
| 477 case IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED: | |
| 478 return "in_long_idle_period_paused"; | |
| 479 default: | |
| 480 NOTREACHED(); | |
| 481 return nullptr; | |
| 482 } | |
| 483 } | |
| 484 | |
| 485 } // namespace scheduler | |
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Chromium Code Reviews
Issue 2118903002:
scheduler: Move the Blink scheduler into Blink (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master