1 /*
2 * Copyright (c) 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 *
38 // the remembered sets (and many other components), so this thread constantly
39 // reevaluates the prediction for the remembered set scanning costs, and potentially
40 // G1CollectorPolicy resizes the young gen. This may do a premature GC or even
41 // increase the young gen size to keep pause time length goal.
42 class G1YoungRemSetSamplingThread: public ConcurrentGCThread {
43 private:
44 Monitor* _monitor;
45
46 void sample_young_list_rs_lengths();
47
48 void run_service();
49 void stop_service();
50
51 void sleep_before_next_cycle();
52
53 double _vtime_accum; // Accumulated virtual time.
54
55 public:
56 G1YoungRemSetSamplingThread();
57 double vtime_accum() { return _vtime_accum; }
58
59 virtual void run();
60 void stop();
61 };
62
63 #endif // SHARE_VM_GC_G1_G1YOUNGREMSETSAMPLINGTHREAD_HPP
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1 /*
2 * Copyright (c) 2015, 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 *
38 // the remembered sets (and many other components), so this thread constantly
39 // reevaluates the prediction for the remembered set scanning costs, and potentially
40 // G1CollectorPolicy resizes the young gen. This may do a premature GC or even
41 // increase the young gen size to keep pause time length goal.
42 class G1YoungRemSetSamplingThread: public ConcurrentGCThread {
43 private:
44 Monitor* _monitor;
45
46 void sample_young_list_rs_lengths();
47
48 void run_service();
49 void stop_service();
50
51 void sleep_before_next_cycle();
52
53 double _vtime_accum; // Accumulated virtual time.
54
55 public:
56 G1YoungRemSetSamplingThread();
57 double vtime_accum() { return _vtime_accum; }
58 };
59
60 #endif // SHARE_VM_GC_G1_G1YOUNGREMSETSAMPLINGTHREAD_HPP
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