author | phh |
Sat, 30 Nov 2019 14:33:05 -0800 | |
changeset 59330 | 5b96c12f909d |
parent 54678 | 93f09ca4a7f8 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
53244
9807daeb47c4
8216167: Update include guards to reflect correct directories
coleenp
parents:
53117
diff
changeset
|
2 |
* Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. |
1 | 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 |
* |
|
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
21 |
* questions. |
1 | 22 |
* |
23 |
*/ |
|
24 |
||
53244
9807daeb47c4
8216167: Update include guards to reflect correct directories
coleenp
parents:
53117
diff
changeset
|
25 |
#ifndef SHARE_GC_PARALLEL_ADJOININGGENERATIONS_HPP |
9807daeb47c4
8216167: Update include guards to reflect correct directories
coleenp
parents:
53117
diff
changeset
|
26 |
#define SHARE_GC_PARALLEL_ADJOININGGENERATIONS_HPP |
7397 | 27 |
|
30764 | 28 |
#include "gc/parallel/adjoiningVirtualSpaces.hpp" |
29 |
#include "gc/parallel/asPSOldGen.hpp" |
|
30 |
#include "gc/parallel/asPSYoungGen.hpp" |
|
7397 | 31 |
|
1 | 32 |
|
33 |
// Contains two generations that both use an AdjoiningVirtualSpaces. |
|
34 |
// The two generations are adjacent in the reserved space for the |
|
35 |
// heap. Each generation has a virtual space and shrinking and |
|
36 |
// expanding of the generations can still be down with that |
|
37 |
// virtual space as was previously done. If expanding of reserved |
|
38 |
// size of a generation is required, the adjacent generation |
|
39 |
// must be shrunk. Adjusting the boundary between the generations |
|
40 |
// is called for in this class. |
|
41 |
||
13195 | 42 |
class AdjoiningGenerations : public CHeapObj<mtGC> { |
1 | 43 |
friend class VMStructs; |
44 |
private: |
|
45 |
// Move boundary up to expand old gen. Checks are made to |
|
46 |
// determine if the move can be done with specified limits. |
|
47 |
void request_old_gen_expansion(size_t desired_change_in_bytes); |
|
48 |
// Move boundary down to expand young gen. |
|
49 |
bool request_young_gen_expansion(size_t desired_change_in_bytes); |
|
50 |
||
53117
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
51 |
protected: |
54264
41af8d0546bc
8221260: Initialize more class members on construction, remove some unused ones
lkorinth
parents:
53244
diff
changeset
|
52 |
AdjoiningGenerations(); |
53117
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
53 |
// The young generation and old generation, respectively |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
54 |
PSYoungGen* _young_gen; |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
55 |
PSOldGen* _old_gen; |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
56 |
|
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
57 |
// The spaces used by the two generations. |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
58 |
AdjoiningVirtualSpaces* _virtual_spaces; |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
59 |
|
1 | 60 |
public: |
54678
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54264
diff
changeset
|
61 |
AdjoiningGenerations(ReservedSpace rs); |
1 | 62 |
|
63 |
// Accessors |
|
64 |
PSYoungGen* young_gen() { return _young_gen; } |
|
65 |
PSOldGen* old_gen() { return _old_gen; } |
|
66 |
||
53117
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
67 |
AdjoiningVirtualSpaces* virtual_spaces() { return _virtual_spaces; } |
1 | 68 |
|
69 |
// Additional space is needed in the old generation. Check |
|
70 |
// the available space and attempt to move the boundary if more space |
|
71 |
// is needed. The growth is not guaranteed to occur. |
|
72 |
void adjust_boundary_for_old_gen_needs(size_t desired_change_in_bytes); |
|
22551 | 73 |
// Similarly for a growth of the young generation. |
1 | 74 |
void adjust_boundary_for_young_gen_needs(size_t eden_size, size_t survivor_size); |
75 |
||
76 |
// Return the total byte size of the reserved space |
|
77 |
// for the adjoining generations. |
|
53117
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
78 |
virtual size_t reserved_byte_size(); |
37930c6ba6d7
8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
sangheki
parents:
47216
diff
changeset
|
79 |
|
54678
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54264
diff
changeset
|
80 |
// Return new AdjoiningGenerations instance based on arguments (specifically - whether heap is heterogeneous). |
93f09ca4a7f8
8198505: Remove CollectorPolicy and its subclasses
stefank
parents:
54264
diff
changeset
|
81 |
static AdjoiningGenerations* create_adjoining_generations(ReservedSpace rs); |
1 | 82 |
}; |
53244
9807daeb47c4
8216167: Update include guards to reflect correct directories
coleenp
parents:
53117
diff
changeset
|
83 |
#endif // SHARE_GC_PARALLEL_ADJOININGGENERATIONS_HPP |