Fri, 18 Feb 2011 10:07:34 -0800
7020042: G1: Partially remove fix for 6994628
Summary: Disable reference discovery and processing during concurrent marking by disabling fix for 6994628.
Reviewed-by: tonyp, ysr
1 /*
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25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
28 #include "gc_implementation/shared/concurrentGCThread.hpp"
30 // Forward Decl.
31 class ConcurrentG1Refine;
33 // The G1 Concurrent Refinement Thread (could be several in the future).
35 class ConcurrentG1RefineThread: public ConcurrentGCThread {
36 friend class VMStructs;
37 friend class G1CollectedHeap;
39 double _vtime_start; // Initial virtual time.
40 double _vtime_accum; // Initial virtual time.
41 int _worker_id;
42 int _worker_id_offset;
44 // The refinement threads collection is linked list. A predecessor can activate a successor
45 // when the number of the rset update buffer crosses a certain threshold. A successor
46 // would self-deactivate when the number of the buffers falls below the threshold.
47 bool _active;
48 ConcurrentG1RefineThread* _next;
49 Monitor* _monitor;
50 ConcurrentG1Refine* _cg1r;
52 int _thread_threshold_step;
53 // This thread activation threshold
54 int _threshold;
55 // This thread deactivation threshold
56 int _deactivation_threshold;
58 void sample_young_list_rs_lengths();
59 void run_young_rs_sampling();
60 void wait_for_completed_buffers();
62 void set_active(bool x) { _active = x; }
63 bool is_active();
64 void activate();
65 void deactivate();
67 // For use by G1CollectedHeap, which is a friend.
68 static SuspendibleThreadSet* sts() { return &_sts; }
70 public:
71 virtual void run();
72 // Constructor
73 ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,
74 int worker_id_offset, int worker_id);
76 void initialize();
78 // Printing
79 void print() const;
80 void print_on(outputStream* st) const;
82 // Total virtual time so far.
83 double vtime_accum() { return _vtime_accum; }
85 ConcurrentG1Refine* cg1r() { return _cg1r; }
87 // Yield for GC
88 void yield();
89 // shutdown
90 void stop();
91 };
93 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP