1 /*
2 * Copyright (c) 2001, 2014, 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 *
44 _monitor(NULL),
45 _cg1r(cg1r),
46 _vtime_accum(0.0)
47 {
48
49 // Each thread has its own monitor. The i-th thread is responsible for signaling
50 // to thread i+1 if the number of buffers in the queue exceeds a threshold for this
51 // thread. Monitors are also used to wake up the threads during termination.
52 // The 0th worker in notified by mutator threads and has a special monitor.
53 // The last worker is used for young gen rset size sampling.
54 if (worker_id > 0) {
55 _monitor = new Monitor(Mutex::nonleaf, "Refinement monitor", true,
56 Monitor::_safepoint_check_never);
57 } else {
58 _monitor = DirtyCardQ_CBL_mon;
59 }
60 initialize();
61 create_and_start();
62
63 // set name
64 set_name("G1 Concurrent Refinement Thread#%d", worker_id);
65 }
66
67 void ConcurrentG1RefineThread::initialize() {
68 if (_worker_id < cg1r()->worker_thread_num()) {
69 // Current thread activation threshold
70 _threshold = MIN2<int>(cg1r()->thread_threshold_step() * (_worker_id + 1) + cg1r()->green_zone(),
71 cg1r()->yellow_zone());
72 // A thread deactivates once the number of buffer reached a deactivation threshold
73 _deactivation_threshold = MAX2<int>(_threshold - cg1r()->thread_threshold_step(), cg1r()->green_zone());
74 } else {
75 set_active(true);
76 }
77 }
78
79 void ConcurrentG1RefineThread::sample_young_list_rs_lengths() {
80 SuspendibleThreadSetJoiner sts;
81 G1CollectedHeap* g1h = G1CollectedHeap::heap();
82 G1CollectorPolicy* g1p = g1h->g1_policy();
83 if (g1p->adaptive_young_list_length()) {
84 int regions_visited = 0;
|
1 /*
2 * Copyright (c) 2001, 2015, 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 *
44 _monitor(NULL),
45 _cg1r(cg1r),
46 _vtime_accum(0.0)
47 {
48
49 // Each thread has its own monitor. The i-th thread is responsible for signaling
50 // to thread i+1 if the number of buffers in the queue exceeds a threshold for this
51 // thread. Monitors are also used to wake up the threads during termination.
52 // The 0th worker in notified by mutator threads and has a special monitor.
53 // The last worker is used for young gen rset size sampling.
54 if (worker_id > 0) {
55 _monitor = new Monitor(Mutex::nonleaf, "Refinement monitor", true,
56 Monitor::_safepoint_check_never);
57 } else {
58 _monitor = DirtyCardQ_CBL_mon;
59 }
60 initialize();
61 create_and_start();
62
63 // set name
64 set_name("G1 ConRefine#%d", worker_id);
65 }
66
67 void ConcurrentG1RefineThread::initialize() {
68 if (_worker_id < cg1r()->worker_thread_num()) {
69 // Current thread activation threshold
70 _threshold = MIN2<int>(cg1r()->thread_threshold_step() * (_worker_id + 1) + cg1r()->green_zone(),
71 cg1r()->yellow_zone());
72 // A thread deactivates once the number of buffer reached a deactivation threshold
73 _deactivation_threshold = MAX2<int>(_threshold - cg1r()->thread_threshold_step(), cg1r()->green_zone());
74 } else {
75 set_active(true);
76 }
77 }
78
79 void ConcurrentG1RefineThread::sample_young_list_rs_lengths() {
80 SuspendibleThreadSetJoiner sts;
81 G1CollectedHeap* g1h = G1CollectedHeap::heap();
82 G1CollectorPolicy* g1p = g1h->g1_policy();
83 if (g1p->adaptive_young_list_length()) {
84 int regions_visited = 0;
|