1/*
2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24#ifndef SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP
25#define SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP
26
27#include "gc/shenandoah/shenandoahHeuristics.hpp"
28#include "gc/shenandoah/shenandoahPhaseTimings.hpp"
29#include "utilities/numberSeq.hpp"
30
31class ShenandoahAdaptiveHeuristics : public ShenandoahHeuristics {
32private:
33 TruncatedSeq* _cycle_gap_history;
34 TruncatedSeq* _conc_mark_duration_history;
35 TruncatedSeq* _conc_uprefs_duration_history;
36
37public:
38 ShenandoahAdaptiveHeuristics();
39
40 virtual ~ShenandoahAdaptiveHeuristics();
41
42 virtual void choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
43 RegionData* data, size_t size,
44 size_t actual_free);
45
46 void record_cycle_start();
47
48 virtual void record_phase_time(ShenandoahPhaseTimings::Phase phase, double secs);
49
50 virtual bool should_start_normal_gc() const;
51
52 virtual bool should_start_update_refs();
53
54 virtual const char* name();
55
56 virtual bool is_diagnostic();
57
58 virtual bool is_experimental();
59};
60
61#endif // SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP
62