ysr@777: /*
stefank@2314:  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
stefank@2314: 
stefank@2314: #include "gc_implementation/shared/concurrentGCThread.hpp"
stefank@2314: 
ysr@777: // Forward Decl.
ysr@777: class ConcurrentG1Refine;
ysr@777: 
ysr@777: // The G1 Concurrent Refinement Thread (could be several in the future).
ysr@777: 
ysr@777: class ConcurrentG1RefineThread: public ConcurrentGCThread {
ysr@777:   friend class VMStructs;
ysr@777:   friend class G1CollectedHeap;
ysr@777: 
ysr@777:   double _vtime_start;  // Initial virtual time.
ysr@777:   double _vtime_accum;  // Initial virtual time.
iveresov@1229:   int _worker_id;
iveresov@1230:   int _worker_id_offset;
ysr@777: 
iveresov@1229:   // The refinement threads collection is linked list. A predecessor can activate a successor
iveresov@1229:   // when the number of the rset update buffer crosses a certain threshold. A successor
iveresov@1229:   // would self-deactivate when the number of the buffers falls below the threshold.
iveresov@1229:   bool _active;
iveresov@1546:   ConcurrentG1RefineThread* _next;
iveresov@1546:   Monitor* _monitor;
iveresov@1546:   ConcurrentG1Refine* _cg1r;
ysr@777: 
iveresov@1546:   int _thread_threshold_step;
iveresov@1546:   // This thread activation threshold
iveresov@1546:   int _threshold;
iveresov@1546:   // This thread deactivation threshold
iveresov@1546:   int _deactivation_threshold;
iveresov@1229: 
iveresov@1546:   void sample_young_list_rs_lengths();
iveresov@1546:   void run_young_rs_sampling();
iveresov@1546:   void wait_for_completed_buffers();
ysr@777: 
iveresov@1546:   void set_active(bool x) { _active = x; }
iveresov@1546:   bool is_active();
iveresov@1546:   void activate();
iveresov@1546:   void deactivate();
ysr@777: 
ysr@777:   // For use by G1CollectedHeap, which is a friend.
ysr@777:   static SuspendibleThreadSet* sts() { return &_sts; }
ysr@777: 
iveresov@1546: public:
iveresov@1546:   virtual void run();
ysr@777:   // Constructor
iveresov@1230:   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,
iveresov@1230:                            int worker_id_offset, int worker_id);
ysr@777: 
iveresov@1546:   void initialize();
iveresov@1546: 
ysr@777:   // Printing
tonyp@1454:   void print() const;
tonyp@1454:   void print_on(outputStream* st) const;
ysr@777: 
ysr@777:   // Total virtual time so far.
ysr@777:   double vtime_accum() { return _vtime_accum; }
ysr@777: 
iveresov@1546:   ConcurrentG1Refine* cg1r() { return _cg1r;     }
ysr@777: 
ysr@777:   // Yield for GC
iveresov@1546:   void yield();
ysr@777:   // shutdown
iveresov@1229:   void stop();
ysr@777: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP