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comparison src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.hpp @ 4095:bca17e38de00

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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads Summary: Select number of GC threads dynamically based on heap usage and number of Java threads Reviewed-by: johnc, ysr, jcoomes
author jmasa
date Tue, 09 Aug 2011 10:16:01 -0700
parents f95d63e2154a
children d2a62e0f25eb
comparison
equal deleted inserted replaced
4094:3a298e04d914 4095:bca17e38de00
33 33
34 // Declarations of classes referenced in this file via pointer. 34 // Declarations of classes referenced in this file via pointer.
35 class GCTaskManager; 35 class GCTaskManager;
36 36
37 class GCTaskThread : public WorkerThread { 37 class GCTaskThread : public WorkerThread {
38 friend class GCTaskManager;
38 private: 39 private:
39 // Instance state. 40 // Instance state.
40 GCTaskManager* _manager; // Manager for worker. 41 GCTaskManager* _manager; // Manager for worker.
41 const uint _processor_id; // Which processor the worker is on. 42 const uint _processor_id; // Which processor the worker is on.
42 43
43 GCTaskTimeStamp* _time_stamps; 44 GCTaskTimeStamp* _time_stamps;
44 uint _time_stamp_index; 45 uint _time_stamp_index;
45 46
46 GCTaskTimeStamp* time_stamp_at(uint index); 47 GCTaskTimeStamp* time_stamp_at(uint index);
48
49 bool _is_working; // True if participating in GC tasks
47 50
48 public: 51 public:
49 // Factory create and destroy methods. 52 // Factory create and destroy methods.
50 static GCTaskThread* create(GCTaskManager* manager, 53 static GCTaskThread* create(GCTaskManager* manager,
51 uint which, 54 uint which,
82 return id(); 85 return id();
83 } 86 }
84 uint processor_id() const { 87 uint processor_id() const {
85 return _processor_id; 88 return _processor_id;
86 } 89 }
90 void set_is_working(bool v) { _is_working = v; }
87 }; 91 };
88 92
89 class GCTaskTimeStamp : public CHeapObj 93 class GCTaskTimeStamp : public CHeapObj
90 { 94 {
91 private: 95 private: