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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project 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 #ifndef V8_OPTIMIZING_COMPILE_DISPATCHER_H_ | 5 #ifndef V8_OPTIMIZING_COMPILE_DISPATCHER_H_ |
| 6 #define V8_OPTIMIZING_COMPILE_DISPATCHER_H_ | 6 #define V8_OPTIMIZING_COMPILE_DISPATCHER_H_ |
| 7 | 7 |
| 8 #include <queue> | 8 #include <queue> |
| 9 | 9 |
| 10 #include "src/base/atomicops.h" | 10 #include "src/base/atomicops.h" |
| 11 #include "src/base/platform/condition-variable.h" | 11 #include "src/base/platform/condition-variable.h" |
| 12 #include "src/base/platform/mutex.h" | 12 #include "src/base/platform/mutex.h" |
| 13 #include "src/base/platform/platform.h" | 13 #include "src/base/platform/platform.h" |
| 14 #include "src/flags.h" | 14 #include "src/flags.h" |
| 15 #include "src/list.h" | 15 #include "src/list.h" |
| 16 | 16 |
| 17 namespace v8 { | 17 namespace v8 { |
| 18 namespace internal { | 18 namespace internal { |
| 19 | 19 |
| 20 class HOptimizedGraphBuilder; | 20 class CompilationJob; |
| 21 class OptimizedCompileJob; | |
| 22 class SharedFunctionInfo; | 21 class SharedFunctionInfo; |
| 23 | 22 |
| 24 class OptimizingCompileDispatcher { | 23 class OptimizingCompileDispatcher { |
| 25 public: | 24 public: |
| 26 explicit OptimizingCompileDispatcher(Isolate* isolate) | 25 explicit OptimizingCompileDispatcher(Isolate* isolate) |
| 27 : isolate_(isolate), | 26 : isolate_(isolate), |
| 28 input_queue_capacity_(FLAG_concurrent_recompilation_queue_length), | 27 input_queue_capacity_(FLAG_concurrent_recompilation_queue_length), |
| 29 input_queue_length_(0), | 28 input_queue_length_(0), |
| 30 input_queue_shift_(0), | 29 input_queue_shift_(0), |
| 31 blocked_jobs_(0), | 30 blocked_jobs_(0), |
| 32 ref_count_(0), | 31 ref_count_(0), |
| 33 recompilation_delay_(FLAG_concurrent_recompilation_delay) { | 32 recompilation_delay_(FLAG_concurrent_recompilation_delay) { |
| 34 base::NoBarrier_Store(&mode_, static_cast<base::AtomicWord>(COMPILE)); | 33 base::NoBarrier_Store(&mode_, static_cast<base::AtomicWord>(COMPILE)); |
| 35 input_queue_ = NewArray<OptimizedCompileJob*>(input_queue_capacity_); | 34 input_queue_ = NewArray<CompilationJob*>(input_queue_capacity_); |
| 36 } | 35 } |
| 37 | 36 |
| 38 ~OptimizingCompileDispatcher(); | 37 ~OptimizingCompileDispatcher(); |
| 39 | 38 |
| 40 void Run(); | 39 void Run(); |
| 41 void Stop(); | 40 void Stop(); |
| 42 void Flush(); | 41 void Flush(); |
| 43 void QueueForOptimization(OptimizedCompileJob* optimizing_compiler); | 42 void QueueForOptimization(CompilationJob* job); |
| 44 void Unblock(); | 43 void Unblock(); |
| 45 void InstallOptimizedFunctions(); | 44 void InstallOptimizedFunctions(); |
| 46 | 45 |
| 47 inline bool IsQueueAvailable() { | 46 inline bool IsQueueAvailable() { |
| 48 base::LockGuard<base::Mutex> access_input_queue(&input_queue_mutex_); | 47 base::LockGuard<base::Mutex> access_input_queue(&input_queue_mutex_); |
| 49 return input_queue_length_ < input_queue_capacity_; | 48 return input_queue_length_ < input_queue_capacity_; |
| 50 } | 49 } |
| 51 | 50 |
| 52 static bool Enabled() { return FLAG_concurrent_recompilation; } | 51 static bool Enabled() { return FLAG_concurrent_recompilation; } |
| 53 | 52 |
| 54 private: | 53 private: |
| 55 class CompileTask; | 54 class CompileTask; |
| 56 | 55 |
| 57 enum ModeFlag { COMPILE, FLUSH }; | 56 enum ModeFlag { COMPILE, FLUSH }; |
| 58 | 57 |
| 59 void FlushOutputQueue(bool restore_function_code); | 58 void FlushOutputQueue(bool restore_function_code); |
| 60 void CompileNext(OptimizedCompileJob* job); | 59 void CompileNext(CompilationJob* job); |
| 61 OptimizedCompileJob* NextInput(bool check_if_flushing = false); | 60 CompilationJob* NextInput(bool check_if_flushing = false); |
| 62 | 61 |
| 63 inline int InputQueueIndex(int i) { | 62 inline int InputQueueIndex(int i) { |
| 64 int result = (i + input_queue_shift_) % input_queue_capacity_; | 63 int result = (i + input_queue_shift_) % input_queue_capacity_; |
| 65 DCHECK_LE(0, result); | 64 DCHECK_LE(0, result); |
| 66 DCHECK_LT(result, input_queue_capacity_); | 65 DCHECK_LT(result, input_queue_capacity_); |
| 67 return result; | 66 return result; |
| 68 } | 67 } |
| 69 | 68 |
| 70 Isolate* isolate_; | 69 Isolate* isolate_; |
| 71 | 70 |
| 72 // Circular queue of incoming recompilation tasks (including OSR). | 71 // Circular queue of incoming recompilation tasks (including OSR). |
| 73 OptimizedCompileJob** input_queue_; | 72 CompilationJob** input_queue_; |
| 74 int input_queue_capacity_; | 73 int input_queue_capacity_; |
| 75 int input_queue_length_; | 74 int input_queue_length_; |
| 76 int input_queue_shift_; | 75 int input_queue_shift_; |
| 77 base::Mutex input_queue_mutex_; | 76 base::Mutex input_queue_mutex_; |
| 78 | 77 |
| 79 // Queue of recompilation tasks ready to be installed (excluding OSR). | 78 // Queue of recompilation tasks ready to be installed (excluding OSR). |
| 80 std::queue<OptimizedCompileJob*> output_queue_; | 79 std::queue<CompilationJob*> output_queue_; |
| 81 // Used for job based recompilation which has multiple producers on | 80 // Used for job based recompilation which has multiple producers on |
| 82 // different threads. | 81 // different threads. |
| 83 base::Mutex output_queue_mutex_; | 82 base::Mutex output_queue_mutex_; |
| 84 | 83 |
| 85 volatile base::AtomicWord mode_; | 84 volatile base::AtomicWord mode_; |
| 86 | 85 |
| 87 int blocked_jobs_; | 86 int blocked_jobs_; |
| 88 | 87 |
| 89 int ref_count_; | 88 int ref_count_; |
| 90 base::Mutex ref_count_mutex_; | 89 base::Mutex ref_count_mutex_; |
| 91 base::ConditionVariable ref_count_zero_; | 90 base::ConditionVariable ref_count_zero_; |
| 92 | 91 |
| 93 // Copy of FLAG_concurrent_recompilation_delay that will be used from the | 92 // Copy of FLAG_concurrent_recompilation_delay that will be used from the |
| 94 // background thread. | 93 // background thread. |
| 95 // | 94 // |
| 96 // Since flags might get modified while the background thread is running, it | 95 // Since flags might get modified while the background thread is running, it |
| 97 // is not safe to access them directly. | 96 // is not safe to access them directly. |
| 98 int recompilation_delay_; | 97 int recompilation_delay_; |
| 99 }; | 98 }; |
| 100 } // namespace internal | 99 } // namespace internal |
| 101 } // namespace v8 | 100 } // namespace v8 |
| 102 | 101 |
| 103 #endif // V8_OPTIMIZING_COMPILE_DISPATCHER_H_ | 102 #endif // V8_OPTIMIZING_COMPILE_DISPATCHER_H_ |
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