Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsPermGen.cpp @ 1839:e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
Summary: Concurrent collectors should expand the perm gen without a full STW GC, but possibly by triggering a concurrent collection. Temporary band-aid for G1 where no concurrent collection is kicked off since the perm gen is not collected concurrently.
Reviewed-by: johnc
| author | ysr |
|---|---|
| date | Fri, 01 Oct 2010 16:12:54 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1839
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
139
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
139
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
139
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_cmsPermGen.cpp.incl" | |
| 27 | |
| 28 CMSPermGen::CMSPermGen(ReservedSpace rs, size_t initial_byte_size, | |
| 29 CardTableRS* ct, | |
| 30 FreeBlockDictionary::DictionaryChoice dictionaryChoice) { | |
| 31 CMSPermGenGen* g = | |
| 32 new CMSPermGenGen(rs, initial_byte_size, -1, ct); | |
| 33 if (g == NULL) { | |
| 34 vm_exit_during_initialization("Could not allocate a CompactingPermGen"); | |
| 35 } | |
| 36 | |
| 37 g->initialize_performance_counters(); | |
| 38 | |
| 39 _gen = g; | |
| 40 } | |
| 41 | |
| 42 HeapWord* CMSPermGen::mem_allocate(size_t size) { | |
| 43 Mutex* lock = _gen->freelistLock(); | |
| 44 bool lock_owned = lock->owned_by_self(); | |
| 45 if (lock_owned) { | |
| 46 MutexUnlocker mul(lock); | |
|
139
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
47 return mem_allocate_in_gen(size, _gen); |
| 0 | 48 } else { |
|
139
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
49 return mem_allocate_in_gen(size, _gen); |
| 0 | 50 } |
| 51 } | |
| 52 | |
|
1839
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
53 HeapWord* CMSPermGen::request_expand_and_allocate(Generation* gen, |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
54 size_t size, |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
55 GCCause::Cause prev_cause /* ignored */) { |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
56 HeapWord* obj = gen->expand_and_allocate(size, false); |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
57 if (gen->capacity() >= _capacity_expansion_limit) { |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
58 set_capacity_expansion_limit(gen->capacity() + MaxPermHeapExpansion); |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
59 assert(((ConcurrentMarkSweepGeneration*)gen)->should_concurrent_collect(), |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
60 "Should kick off a collection if one not in progress"); |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
61 } |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
62 return obj; |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
63 } |
|
e41cd7fd68a6
6794422: Perm gen expansion policy for concurrent collectors
ysr
parents:
1552
diff
changeset
|
64 |
| 0 | 65 void CMSPermGen::compute_new_size() { |
| 66 _gen->compute_new_size(); | |
| 67 } | |
| 68 | |
| 69 void CMSPermGenGen::initialize_performance_counters() { | |
| 70 | |
| 71 const char* gen_name = "perm"; | |
| 72 | |
| 73 // Generation Counters - generation 2, 1 subspace | |
| 74 _gen_counters = new GenerationCounters(gen_name, 2, 1, &_virtual_space); | |
| 75 | |
| 76 _gc_counters = NULL; | |
| 77 | |
| 78 _space_counters = new GSpaceCounters(gen_name, 0, | |
| 79 _virtual_space.reserved_size(), | |
| 80 this, _gen_counters); | |
| 81 } |