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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/task_scheduler/task_scheduler.h" | 5 #include "base/task_scheduler/task_scheduler.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/sys_info.h" | 11 #include "base/sys_info.h" |
12 #include "base/task_scheduler/scheduler_worker_pool_params.h" | 12 #include "base/task_scheduler/scheduler_worker_pool_params.h" |
13 #include "base/task_scheduler/task_scheduler_impl.h" | 13 #include "base/task_scheduler/task_scheduler_impl.h" |
14 #include "base/threading/platform_thread.h" | 14 #include "base/threading/platform_thread.h" |
15 #include "base/time/time.h" | 15 #include "base/time/time.h" |
16 | 16 |
17 namespace base { | 17 namespace base { |
18 | 18 |
19 namespace { | 19 namespace { |
20 | 20 |
21 // |g_task_scheduler| is intentionally leaked on shutdown. | 21 // |g_task_scheduler| is intentionally leaked on shutdown. |
22 TaskScheduler* g_task_scheduler = nullptr; | 22 TaskScheduler* g_task_scheduler = nullptr; |
23 | 23 |
24 SchedulerWorkerPoolParams GetWorkerPoolParamsWithPredefinedNameAndPriority( | |
gab
2017/03/20 20:31:56
It's not really "predefined" as it's being defined
fdoray
2017/03/20 20:43:54
Done.
| |
25 const std::string& name, | |
26 ThreadPriority priority_hint, | |
robliao
2017/03/20 20:47:32
The end state version won't be using SchedulerWork
fdoray
2017/03/20 20:55:35
Yes it will https://codereview.chromium.org/274930
robliao
2017/03/20 21:00:56
So once we remove those params, what will this fil
robliao
2017/03/20 21:55:00
Inlining here so we don't lose track of the thread
robliao
2017/03/20 22:06:27
I guess this is where I'm a little confused.
From
fdoray
2017/03/21 14:41:26
In this CL, TaskSchedulerImpl is still initialized
robliao
2017/03/21 20:02:29
Summary from offline discussion:
An alternative so
fdoray
2017/03/22 13:07:38
Done.
| |
27 const SchedulerWorkerPoolParams params) { | |
28 return SchedulerWorkerPoolParams( | |
29 name, priority_hint, params.standby_thread_policy(), params.max_threads(), | |
30 params.suggested_reclaim_time(), params.backward_compatibility()); | |
31 } | |
32 | |
24 } // namespace | 33 } // namespace |
25 | 34 |
35 TaskScheduler::InitParams::InitParams( | |
36 const SchedulerWorkerPoolParams& background_worker_pool_params_in, | |
37 const SchedulerWorkerPoolParams& background_blocking_worker_pool_params_in, | |
38 const SchedulerWorkerPoolParams& foreground_worker_pool_params_in, | |
39 const SchedulerWorkerPoolParams& foreground_blocking_worker_pool_params_in) | |
40 : background_worker_pool_params(background_worker_pool_params_in), | |
41 background_blocking_worker_pool_params( | |
42 background_blocking_worker_pool_params_in), | |
43 foreground_worker_pool_params(foreground_worker_pool_params_in), | |
44 foreground_blocking_worker_pool_params( | |
45 foreground_blocking_worker_pool_params_in) {} | |
46 | |
26 #if !defined(OS_NACL) | 47 #if !defined(OS_NACL) |
27 // static | 48 // static |
28 void TaskScheduler::CreateAndSetSimpleTaskScheduler(const std::string& name) { | 49 void TaskScheduler::CreateAndSetSimpleTaskScheduler(const std::string& name) { |
29 constexpr int kMinNumThreads = 1; | 50 constexpr int kMinNumThreads = 1; |
30 std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; | 51 std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; |
31 worker_pool_params_vector.emplace_back( | 52 worker_pool_params_vector.emplace_back( |
32 name, ThreadPriority::NORMAL, | 53 name, ThreadPriority::NORMAL, |
33 SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, | 54 SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, |
34 std::max(kMinNumThreads, base::SysInfo::NumberOfProcessors()), | 55 std::max(kMinNumThreads, SysInfo::NumberOfProcessors()), |
35 TimeDelta::FromSeconds(30)); | 56 TimeDelta::FromSeconds(30)); |
36 CreateAndSetDefaultTaskScheduler( | 57 CreateAndSetDefaultTaskScheduler( |
37 worker_pool_params_vector, | 58 worker_pool_params_vector, |
38 Bind([](const TaskTraits&) -> size_t { return 0; })); | 59 Bind([](const TaskTraits&) -> size_t { return 0; })); |
39 } | 60 } |
40 #endif // !defined(OS_NACL) | 61 #endif // !defined(OS_NACL) |
41 | 62 |
42 // static | 63 // static |
43 void TaskScheduler::CreateAndSetDefaultTaskScheduler( | 64 void TaskScheduler::CreateAndSetDefaultTaskScheduler( |
44 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, | 65 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, |
45 const WorkerPoolIndexForTraitsCallback& | 66 const WorkerPoolIndexForTraitsCallback& |
46 worker_pool_index_for_traits_callback) { | 67 worker_pool_index_for_traits_callback) { |
47 SetInstance(internal::TaskSchedulerImpl::Create( | 68 SetInstance(internal::TaskSchedulerImpl::Create( |
48 worker_pool_params_vector, worker_pool_index_for_traits_callback)); | 69 worker_pool_params_vector, worker_pool_index_for_traits_callback)); |
49 } | 70 } |
50 | 71 |
72 void TaskScheduler::CreateAndSetDefaultTaskScheduler( | |
73 const std::string& name, | |
74 const InitParams& init_params) { | |
75 enum WorkerPoolType : size_t { | |
76 BACKGROUND = 0, | |
77 BACKGROUND_BLOCKING, | |
78 FOREGROUND, | |
79 FOREGROUND_BLOCKING, | |
80 WORKER_POOL_COUNT // Always last. | |
81 }; | |
82 | |
83 std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; | |
84 | |
85 DCHECK_EQ(BACKGROUND, worker_pool_params_vector.size()); | |
86 worker_pool_params_vector.emplace_back( | |
87 GetWorkerPoolParamsWithPredefinedNameAndPriority( | |
88 name + "Background", ThreadPriority::BACKGROUND, | |
89 init_params.background_worker_pool_params)); | |
90 | |
91 DCHECK_EQ(BACKGROUND_BLOCKING, worker_pool_params_vector.size()); | |
92 worker_pool_params_vector.emplace_back( | |
93 GetWorkerPoolParamsWithPredefinedNameAndPriority( | |
94 name + "BackgroundBlocking", ThreadPriority::BACKGROUND, | |
95 init_params.background_blocking_worker_pool_params)); | |
96 | |
97 DCHECK_EQ(FOREGROUND, worker_pool_params_vector.size()); | |
98 worker_pool_params_vector.emplace_back( | |
99 GetWorkerPoolParamsWithPredefinedNameAndPriority( | |
100 name + "Foreground", ThreadPriority::NORMAL, | |
101 init_params.foreground_worker_pool_params)); | |
102 | |
103 DCHECK_EQ(FOREGROUND_BLOCKING, worker_pool_params_vector.size()); | |
104 worker_pool_params_vector.emplace_back( | |
105 GetWorkerPoolParamsWithPredefinedNameAndPriority( | |
106 name + "ForegroundBlocking", ThreadPriority::NORMAL, | |
107 init_params.foreground_blocking_worker_pool_params)); | |
108 | |
109 DCHECK_EQ(WORKER_POOL_COUNT, worker_pool_params_vector.size()); | |
110 | |
111 CreateAndSetDefaultTaskScheduler( | |
112 worker_pool_params_vector, Bind([](const TaskTraits& traits) -> size_t { | |
113 const bool is_background = | |
114 traits.priority() == TaskPriority::BACKGROUND; | |
115 if (traits.may_block() || traits.with_base_sync_primitives()) | |
116 return is_background ? BACKGROUND_BLOCKING : FOREGROUND_BLOCKING; | |
117 return is_background ? BACKGROUND : FOREGROUND; | |
118 })); | |
119 } | |
120 | |
51 // static | 121 // static |
52 void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) { | 122 void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) { |
53 delete g_task_scheduler; | 123 delete g_task_scheduler; |
54 g_task_scheduler = task_scheduler.release(); | 124 g_task_scheduler = task_scheduler.release(); |
55 } | 125 } |
56 | 126 |
57 // static | 127 // static |
58 TaskScheduler* TaskScheduler::GetInstance() { | 128 TaskScheduler* TaskScheduler::GetInstance() { |
59 return g_task_scheduler; | 129 return g_task_scheduler; |
60 } | 130 } |
61 | 131 |
62 } // namespace base | 132 } // namespace base |
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