1 /*
2 * Copyright (c) 2002, 2013, 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
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSADAPTIVESIZEPOLICY_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSADAPTIVESIZEPOLICY_HPP
27
28 #include "gc_implementation/shared/adaptiveSizePolicy.hpp"
29 #include "gc_implementation/shared/gcStats.hpp"
30 #include "gc_implementation/shared/gcUtil.hpp"
31 #include "gc_interface/gcCause.hpp"
32
33 // This class keeps statistical information and computes the
34 // optimal free space for both the young and old generation
35 // based on current application characteristics (based on gc cost
36 // and application footprint).
37 //
38 // It also computes an optimal tenuring threshold between the young
39 // and old generations, so as to equalize the cost of collections
40 // of those generations, as well as optimal survivor space sizes
41 // for the young generation.
42 //
43 // While this class is specifically intended for a generational system
44 // consisting of a young gen (containing an Eden and two semi-spaces)
45 // and a tenured gen, as well as a perm gen for reflective data, it
46 // makes NO references to specific generations.
47 //
48 // 05/02/2003 Update
49 // The 1.5 policy makes use of data gathered for the costs of GC on
50 // specific generations. That data does reference specific
51 // generation. Also diagnostics specific to generations have
388 size_t bytes_absorbed_from_eden() const { return _bytes_absorbed_from_eden; }
389 void reset_bytes_absorbed_from_eden() { _bytes_absorbed_from_eden = 0; }
390
391 void set_bytes_absorbed_from_eden(size_t val) {
392 _bytes_absorbed_from_eden = val;
393 }
394
395 // Update averages that are always used (even
396 // if adaptive sizing is turned off).
397 void update_averages(bool is_survivor_overflow,
398 size_t survived,
399 size_t promoted);
400
401 // Printing support
402 virtual bool print_adaptive_size_policy_on(outputStream* st) const;
403
404 // Decay the supplemental growth additive.
405 void decay_supplemental_growth(bool is_full_gc);
406 };
407
408 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSADAPTIVESIZEPOLICY_HPP
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1 /*
2 * Copyright (c) 2002, 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 *
23 */
24
25 #ifndef SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
26 #define SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
27
28 #include "gc/shared/adaptiveSizePolicy.hpp"
29 #include "gc/shared/gcCause.hpp"
30 #include "gc/shared/gcStats.hpp"
31 #include "gc/shared/gcUtil.hpp"
32
33 // This class keeps statistical information and computes the
34 // optimal free space for both the young and old generation
35 // based on current application characteristics (based on gc cost
36 // and application footprint).
37 //
38 // It also computes an optimal tenuring threshold between the young
39 // and old generations, so as to equalize the cost of collections
40 // of those generations, as well as optimal survivor space sizes
41 // for the young generation.
42 //
43 // While this class is specifically intended for a generational system
44 // consisting of a young gen (containing an Eden and two semi-spaces)
45 // and a tenured gen, as well as a perm gen for reflective data, it
46 // makes NO references to specific generations.
47 //
48 // 05/02/2003 Update
49 // The 1.5 policy makes use of data gathered for the costs of GC on
50 // specific generations. That data does reference specific
51 // generation. Also diagnostics specific to generations have
388 size_t bytes_absorbed_from_eden() const { return _bytes_absorbed_from_eden; }
389 void reset_bytes_absorbed_from_eden() { _bytes_absorbed_from_eden = 0; }
390
391 void set_bytes_absorbed_from_eden(size_t val) {
392 _bytes_absorbed_from_eden = val;
393 }
394
395 // Update averages that are always used (even
396 // if adaptive sizing is turned off).
397 void update_averages(bool is_survivor_overflow,
398 size_t survived,
399 size_t promoted);
400
401 // Printing support
402 virtual bool print_adaptive_size_policy_on(outputStream* st) const;
403
404 // Decay the supplemental growth additive.
405 void decay_supplemental_growth(bool is_full_gc);
406 };
407
408 #endif // SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
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