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Issue 1006933003: Add full SetThreadPriority support to Windows. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: tweaks Created 5 years, 8 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 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/threading/platform_thread.h" 5 #include "base/threading/platform_thread.h"
6 6
7 #include <errno.h> 7 #include <errno.h>
8 #include <sched.h> 8 #include <sched.h>
9 9
10 #include "base/lazy_instance.h" 10 #include "base/lazy_instance.h"
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29 #endif 29 #endif
30 } // namespace 30 } // namespace
31 31
32 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = { 32 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = {
33 { kThreadPriority_RealtimeAudio, -10 }, 33 { kThreadPriority_RealtimeAudio, -10 },
34 { kThreadPriority_Background, 10 }, 34 { kThreadPriority_Background, 10 },
35 { kThreadPriority_Normal, 0 }, 35 { kThreadPriority_Normal, 0 },
36 { kThreadPriority_Display, -6 }, 36 { kThreadPriority_Display, -6 },
37 } 37 }
38 38
39 bool HandleSetThreadPriorityForPlatform(PlatformThreadHandle handle, 39 bool SetThreadPriorityForPlatform(PlatformThreadHandle handle,
40 ThreadPriority priority) { 40 ThreadPriority priority) {
41 #if !defined(OS_NACL) 41 #if !defined(OS_NACL)
42 // TODO(gab): Assess the correctness of using |pthread_self()| below instead
43 // of |handle|. http://crbug.com/468793.
42 return priority == kThreadPriority_RealtimeAudio && 44 return priority == kThreadPriority_RealtimeAudio &&
43 pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0; 45 pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0;
44 #else 46 #else
45 return false; 47 return false;
46 #endif 48 #endif
47 } 49 }
48 50
51 bool GetThreadPriorityForPlatform(PlatformThreadHandle handle,
52 ThreadPriority* priority) {
53 #if !defined(OS_NACL)
54 // TODO(gab): Assess the correctness of using |pthread_self()| below instead
55 // of |handle|. http://crbug.com/468793.
56 int maybe_sched_rr = 0;
57 struct sched_param maybe_realtime_prio = {0};
58 if (pthread_getschedparam(pthread_self(), &maybe_sched_rr,
59 &maybe_realtime_prio) == 0 &&
60 maybe_sched_rr == SCHED_RR &&
61 maybe_realtime_prio.sched_priority == kRealTimePrio.sched_priority) {
62 *priority = kThreadPriority_RealtimeAudio;
63 return true;
64 }
65 #endif
66 return false;
67 }
68
49 } // namespace internal 69 } // namespace internal
50 70
51 // static 71 // static
52 void PlatformThread::SetName(const char* name) { 72 void PlatformThread::SetName(const char* name) {
53 ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name); 73 ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
54 tracked_objects::ThreadData::InitializeThreadContext(name); 74 tracked_objects::ThreadData::InitializeThreadContext(name);
55 75
56 #if !defined(OS_NACL) 76 #if !defined(OS_NACL)
57 // On FreeBSD we can get the thread names to show up in the debugger by 77 // On FreeBSD we can get the thread names to show up in the debugger by
58 // setting the process name for the LWP. We don't want to do this for the 78 // setting the process name for the LWP. We don't want to do this for the
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74 #if !defined(THREAD_SANITIZER) 94 #if !defined(THREAD_SANITIZER)
75 return 0; 95 return 0;
76 #else 96 #else
77 // ThreadSanitizer bloats the stack heavily. Evidence has been that the 97 // ThreadSanitizer bloats the stack heavily. Evidence has been that the
78 // default stack size isn't enough for some browser tests. 98 // default stack size isn't enough for some browser tests.
79 return 2 * (1 << 23); // 2 times 8192K (the default stack size on Linux). 99 return 2 * (1 << 23); // 2 times 8192K (the default stack size on Linux).
80 #endif 100 #endif
81 } 101 }
82 102
83 } // namespace base 103 } // namespace base
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