1 /*
2 * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP
26 #define SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP
27
28 #include "gc/g1/dirtyCardQueue.hpp"
29 #include "gc/shared/concurrentGCThread.hpp"
30
31 // Forward Decl.
32 class CardTableEntryClosure;
33 class ConcurrentG1Refine;
34
35 // One or more G1 Concurrent Refinement Threads may be active if concurrent
36 // refinement is in progress.
37 class ConcurrentG1RefineThread: public ConcurrentGCThread {
38 friend class VMStructs;
39 friend class G1CollectedHeap;
40
41 double _vtime_start; // Initial virtual time.
42 double _vtime_accum; // Accumulated virtual time.
43 uint _worker_id;
44 uint _worker_id_offset;
45
46 // The refinement threads collection is linked list. A predecessor can activate a successor
47 // when the number of the rset update buffer crosses a certain threshold. A successor
48 // would self-deactivate when the number of the buffers falls below the threshold.
49 bool _active;
50 ConcurrentG1RefineThread* _next;
51 Monitor* _monitor;
52 ConcurrentG1Refine* _cg1r;
53
54 // This thread's activation/deactivation thresholds
55 size_t _activation_threshold;
56 size_t _deactivation_threshold;
57
58 void wait_for_completed_buffers();
59
60 void set_active(bool x) { _active = x; }
61 bool is_active();
62 void activate();
63 void deactivate();
64
65 bool is_primary() { return (_worker_id == 0); }
66
67 void run_service();
68 void stop_service();
69
70 public:
71 // Constructor
72 ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,
73 uint worker_id_offset, uint worker_id,
74 size_t activate, size_t deactivate);
75
76 void update_thresholds(size_t activate, size_t deactivate);
77 size_t activation_threshold() const { return _activation_threshold; }
78
79 // Total virtual time so far.
80 double vtime_accum() { return _vtime_accum; }
81
82 ConcurrentG1Refine* cg1r() { return _cg1r; }
83 };
84
85 #endif // SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP
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1 /*
2 * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_G1_G1CONCURRENTREFINETHREAD_HPP
26 #define SHARE_VM_GC_G1_G1CONCURRENTREFINETHREAD_HPP
27
28 #include "gc/g1/dirtyCardQueue.hpp"
29 #include "gc/shared/concurrentGCThread.hpp"
30
31 // Forward Decl.
32 class CardTableEntryClosure;
33 class G1ConcurrentRefine;
34
35 // One or more G1 Concurrent Refinement Threads may be active if concurrent
36 // refinement is in progress.
37 class G1ConcurrentRefineThread: public ConcurrentGCThread {
38 friend class VMStructs;
39 friend class G1CollectedHeap;
40
41 double _vtime_start; // Initial virtual time.
42 double _vtime_accum; // Accumulated virtual time.
43 uint _worker_id;
44 uint _worker_id_offset;
45
46 // The refinement threads collection is linked list. A predecessor can activate a successor
47 // when the number of the rset update buffer crosses a certain threshold. A successor
48 // would self-deactivate when the number of the buffers falls below the threshold.
49 bool _active;
50 G1ConcurrentRefineThread* _next;
51 Monitor* _monitor;
52 G1ConcurrentRefine* _cr;
53
54 // This thread's activation/deactivation thresholds
55 size_t _activation_threshold;
56 size_t _deactivation_threshold;
57
58 void wait_for_completed_buffers();
59
60 void set_active(bool x) { _active = x; }
61 bool is_active();
62 void activate();
63 void deactivate();
64
65 bool is_primary() { return (_worker_id == 0); }
66
67 void run_service();
68 void stop_service();
69
70 public:
71 // Constructor
72 G1ConcurrentRefineThread(G1ConcurrentRefine* cr, G1ConcurrentRefineThread* next,
73 uint worker_id_offset, uint worker_id,
74 size_t activate, size_t deactivate);
75
76 void update_thresholds(size_t activate, size_t deactivate);
77 size_t activation_threshold() const { return _activation_threshold; }
78
79 // Total virtual time so far.
80 double vtime_accum() { return _vtime_accum; }
81
82 G1ConcurrentRefine* cr() { return _cr; }
83 };
84
85 #endif // SHARE_VM_GC_G1_G1CONCURRENTREFINETHREAD_HPP
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