1/*
2 * Copyright (c) 2015, 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#ifndef SHARE_GC_Z_ZDIRECTOR_HPP
25#define SHARE_GC_Z_ZDIRECTOR_HPP
26
27#include "gc/shared/concurrentGCThread.hpp"
28#include "gc/shared/gcCause.hpp"
29#include "gc/z/zMetronome.hpp"
30
31class ZDirector : public ConcurrentGCThread {
32private:
33 static const double one_in_1000;
34
35 ZMetronome _metronome;
36
37 void sample_allocation_rate() const;
38
39 bool is_first() const;
40 bool is_warm() const;
41
42 bool rule_timer() const;
43 bool rule_warmup() const;
44 bool rule_allocation_rate() const;
45 bool rule_proactive() const;
46 bool rule_high_usage() const;
47 GCCause::Cause make_gc_decision() const;
48
49protected:
50 virtual void run_service();
51 virtual void stop_service();
52
53public:
54 ZDirector();
55};
56
57#endif // SHARE_GC_Z_ZDIRECTOR_HPP
58