1 /*
 2  * Copyright Amazon.com Inc. 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
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22  *
23  */
24 
25 #ifndef SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGLOBALHEURISTICS_HPP
26 #define SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGLOBALHEURISTICS_HPP
27 
28 
29 #include "gc/shenandoah/heuristics/shenandoahGenerationalHeuristics.hpp"
30 
31 class ShenandoahGlobalGeneration;
32 
33 /*
34  * This is a specialization of the generational heuristics which is aware
35  * of old and young regions and respects the configured evacuation parameters
36  * for such regions during a global collection of a generational heap.
37  */
38 class ShenandoahGlobalHeuristics : public ShenandoahGenerationalHeuristics {
39 public:
40   ShenandoahGlobalHeuristics(ShenandoahGlobalGeneration* generation);
41 
42   void choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
43                                              RegionData* data, size_t size,
44                                              size_t actual_free) override;
45 
46 private:
47   void choose_global_collection_set(ShenandoahCollectionSet* cset,
48                                     const ShenandoahHeuristics::RegionData* data,
49                                     size_t size, size_t actual_free,
50                                     size_t cur_young_garbage) const;
51 };
52 
53 
54 #endif // SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGLOBALHEURISTICS_HPP