1 /*
2 * Copyright (c) 2001, 2018, 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 #include "precompiled.hpp"
26 #include "gc/g1/g1BarrierSet.hpp"
27 #include "gc/g1/g1ConcurrentRefine.hpp"
28 #include "gc/g1/g1ConcurrentRefineThread.hpp"
29 #include "gc/shared/suspendibleThreadSet.hpp"
30 #include "logging/log.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/mutexLocker.hpp"
34
35 G1ConcurrentRefineThread::G1ConcurrentRefineThread(G1ConcurrentRefine* cr, uint worker_id) :
36 ConcurrentGCThread(),
37 _vtime_start(0.0),
38 _vtime_accum(0.0),
39 _worker_id(worker_id),
40 _active(false),
41 _monitor(NULL),
42 _cr(cr)
43 {
44 // Each thread has its own monitor. The i-th thread is responsible for signaling
45 // to thread i+1 if the number of buffers in the queue exceeds a threshold for this
46 // thread. Monitors are also used to wake up the threads during termination.
47 // The 0th (primary) worker is notified by mutator threads and has a special monitor.
48 if (!is_primary()) {
49 _monitor = new Monitor(Mutex::nonleaf, "Refinement monitor", true,
50 Monitor::_safepoint_check_never);
51 } else {
52 _monitor = DirtyCardQ_CBL_mon;
53 }
54
55 // set name
56 set_name("G1 Refine#%d", worker_id);
57 create_and_start();
58 }
59
60 void G1ConcurrentRefineThread::wait_for_completed_buffers() {
61 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
62 while (!should_terminate() && !is_active()) {
63 _monitor->wait(Mutex::_no_safepoint_check_flag);
64 }
65 }
66
67 bool G1ConcurrentRefineThread::is_active() {
68 DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
69 return is_primary() ? dcqs.process_completed_buffers() : _active;
70 }
71
72 void G1ConcurrentRefineThread::activate() {
73 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
74 if (!is_primary()) {
75 set_active(true);
76 } else {
77 DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
78 dcqs.set_process_completed_buffers(true);
79 }
80 _monitor->notify();
81 }
82
83 void G1ConcurrentRefineThread::deactivate() {
84 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
85 if (!is_primary()) {
86 set_active(false);
87 } else {
88 DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
89 dcqs.set_process_completed_buffers(false);
90 }
91 }
92
93 void G1ConcurrentRefineThread::run_service() {
94 _vtime_start = os::elapsedVTime();
95
96 while (!should_terminate()) {
97 // Wait for work
98 wait_for_completed_buffers();
99 if (should_terminate()) {
100 break;
101 }
102
103 size_t buffers_processed = 0;
104 log_debug(gc, refine)("Activated worker %d, on threshold: " SIZE_FORMAT ", current: " SIZE_FORMAT,
105 _worker_id, _cr->activation_threshold(_worker_id),
106 G1BarrierSet::dirty_card_queue_set().completed_buffers_num());
107
108 {
|
1 /*
2 * Copyright (c) 2001, 2019, 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 #include "precompiled.hpp"
26 #include "gc/g1/g1BarrierSet.hpp"
27 #include "gc/g1/g1ConcurrentRefine.hpp"
28 #include "gc/g1/g1ConcurrentRefineThread.hpp"
29 #include "gc/g1/g1DirtyCardQueue.hpp"
30 #include "gc/shared/suspendibleThreadSet.hpp"
31 #include "logging/log.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/handles.inline.hpp"
34 #include "runtime/mutexLocker.hpp"
35
36 G1ConcurrentRefineThread::G1ConcurrentRefineThread(G1ConcurrentRefine* cr, uint worker_id) :
37 ConcurrentGCThread(),
38 _vtime_start(0.0),
39 _vtime_accum(0.0),
40 _worker_id(worker_id),
41 _active(false),
42 _monitor(NULL),
43 _cr(cr)
44 {
45 // Each thread has its own monitor. The i-th thread is responsible for signaling
46 // to thread i+1 if the number of buffers in the queue exceeds a threshold for this
47 // thread. Monitors are also used to wake up the threads during termination.
48 // The 0th (primary) worker is notified by mutator threads and has a special monitor.
49 if (!is_primary()) {
50 _monitor = new Monitor(Mutex::nonleaf, "Refinement monitor", true,
51 Monitor::_safepoint_check_never);
52 } else {
53 _monitor = DirtyCardQ_CBL_mon;
54 }
55
56 // set name
57 set_name("G1 Refine#%d", worker_id);
58 create_and_start();
59 }
60
61 void G1ConcurrentRefineThread::wait_for_completed_buffers() {
62 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
63 while (!should_terminate() && !is_active()) {
64 _monitor->wait(Mutex::_no_safepoint_check_flag);
65 }
66 }
67
68 bool G1ConcurrentRefineThread::is_active() {
69 G1DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
70 return is_primary() ? dcqs.process_completed_buffers() : _active;
71 }
72
73 void G1ConcurrentRefineThread::activate() {
74 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
75 if (!is_primary()) {
76 set_active(true);
77 } else {
78 G1DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
79 dcqs.set_process_completed_buffers(true);
80 }
81 _monitor->notify();
82 }
83
84 void G1ConcurrentRefineThread::deactivate() {
85 MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
86 if (!is_primary()) {
87 set_active(false);
88 } else {
89 G1DirtyCardQueueSet& dcqs = G1BarrierSet::dirty_card_queue_set();
90 dcqs.set_process_completed_buffers(false);
91 }
92 }
93
94 void G1ConcurrentRefineThread::run_service() {
95 _vtime_start = os::elapsedVTime();
96
97 while (!should_terminate()) {
98 // Wait for work
99 wait_for_completed_buffers();
100 if (should_terminate()) {
101 break;
102 }
103
104 size_t buffers_processed = 0;
105 log_debug(gc, refine)("Activated worker %d, on threshold: " SIZE_FORMAT ", current: " SIZE_FORMAT,
106 _worker_id, _cr->activation_threshold(_worker_id),
107 G1BarrierSet::dirty_card_queue_set().completed_buffers_num());
108
109 {
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