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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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33 | 33 |
34 namespace v8 { | 34 namespace v8 { |
35 namespace internal { | 35 namespace internal { |
36 | 36 |
37 class Isolate; | 37 class Isolate; |
38 class JSFunction; | 38 class JSFunction; |
39 class Object; | 39 class Object; |
40 class PendingListNode; | 40 class PendingListNode; |
41 class Semaphore; | 41 class Semaphore; |
42 | 42 |
43 | |
44 enum SamplerState { | |
45 IN_NON_JS_STATE = 0, | |
46 IN_JS_STATE = 1 | |
47 }; | |
48 | |
49 | |
50 class RuntimeProfiler { | 43 class RuntimeProfiler { |
51 public: | 44 public: |
52 explicit RuntimeProfiler(Isolate* isolate); | 45 explicit RuntimeProfiler(Isolate* isolate); |
53 | 46 |
54 static bool IsEnabled(); | 47 static bool IsEnabled(); |
55 | 48 |
56 void OptimizeNow(); | 49 void OptimizeNow(); |
57 void OptimizeSoon(JSFunction* function); | 50 void OptimizeSoon(JSFunction* function); |
58 | 51 |
59 void NotifyTick(); | 52 void NotifyTick(); |
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94 static void WakeUpRuntimeProfilerThreadBeforeShutdown(); | 87 static void WakeUpRuntimeProfilerThreadBeforeShutdown(); |
95 | 88 |
96 void UpdateSamplesAfterScavenge(); | 89 void UpdateSamplesAfterScavenge(); |
97 void RemoveDeadSamples(); | 90 void RemoveDeadSamples(); |
98 void UpdateSamplesAfterCompact(ObjectVisitor* visitor); | 91 void UpdateSamplesAfterCompact(ObjectVisitor* visitor); |
99 | 92 |
100 private: | 93 private: |
101 static const int kSamplerWindowSize = 16; | 94 static const int kSamplerWindowSize = 16; |
102 static const int kStateWindowSize = 128; | 95 static const int kStateWindowSize = 128; |
103 | 96 |
| 97 enum SamplerState { |
| 98 IN_NON_JS_STATE = 0, |
| 99 IN_JS_STATE = 1 |
| 100 }; |
| 101 |
104 static void HandleWakeUp(Isolate* isolate); | 102 static void HandleWakeUp(Isolate* isolate); |
105 | 103 |
106 void Optimize(JSFunction* function, bool eager, int delay); | 104 void Optimize(JSFunction* function, bool eager, int delay); |
107 | 105 |
108 void AttemptOnStackReplacement(JSFunction* function); | 106 void AttemptOnStackReplacement(JSFunction* function); |
109 | 107 |
110 void ClearSampleBuffer(); | 108 void ClearSampleBuffer(); |
111 | 109 |
112 void ClearSampleBufferNewSpaceEntries(); | 110 void ClearSampleBufferNewSpaceEntries(); |
113 | 111 |
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130 | 128 |
131 Object* sampler_window_[kSamplerWindowSize]; | 129 Object* sampler_window_[kSamplerWindowSize]; |
132 int sampler_window_position_; | 130 int sampler_window_position_; |
133 int sampler_window_weight_[kSamplerWindowSize]; | 131 int sampler_window_weight_[kSamplerWindowSize]; |
134 | 132 |
135 // Support for pending 'optimize soon' requests. | 133 // Support for pending 'optimize soon' requests. |
136 PendingListNode* optimize_soon_list_; | 134 PendingListNode* optimize_soon_list_; |
137 | 135 |
138 SamplerState state_window_[kStateWindowSize]; | 136 SamplerState state_window_[kStateWindowSize]; |
139 int state_window_position_; | 137 int state_window_position_; |
| 138 int state_window_ticks_; |
140 int state_counts_[2]; | 139 int state_counts_[2]; |
141 | 140 |
142 // Possible state values: | 141 // Possible state values: |
143 // -1 => the profiler thread is waiting on the semaphore | 142 // -1 => the profiler thread is waiting on the semaphore |
144 // 0 or positive => the number of isolates running JavaScript code. | 143 // 0 or positive => the number of isolates running JavaScript code. |
145 static Atomic32 state_; | 144 static Atomic32 state_; |
146 static Semaphore* semaphore_; | 145 static Semaphore* semaphore_; |
147 }; | 146 }; |
148 | 147 |
149 | 148 |
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183 | 182 |
184 void RuntimeProfiler::IsolateExitedJS(Isolate* isolate) { | 183 void RuntimeProfiler::IsolateExitedJS(Isolate* isolate) { |
185 Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, -1); | 184 Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, -1); |
186 ASSERT(new_state >= 0); | 185 ASSERT(new_state >= 0); |
187 USE(new_state); | 186 USE(new_state); |
188 } | 187 } |
189 | 188 |
190 } } // namespace v8::internal | 189 } } // namespace v8::internal |
191 | 190 |
192 #endif // V8_RUNTIME_PROFILER_H_ | 191 #endif // V8_RUNTIME_PROFILER_H_ |
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