Mercurial > hg > truffle

annotate src/share/vm/memory/permGen.cpp @ 2368:dde920245681

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6896099: Integrate CMS heap ergo with default heap sizing ergo 6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m 7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification 7027529: CMS: retire CMSUseOldDefaults flag Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago. Reviewed-by: brutisso, poonam
author ysr
date Wed, 16 Mar 2011 10:37:08 -0700
parents f95d63e2154a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1 /*
1839
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load
duke
parents:
diff changeset
4 *
a61af66fc99e Initial load
duke
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load
duke
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load
duke
parents:
diff changeset
7 * published by the Free Software Foundation.
a61af66fc99e Initial load
duke
parents:
diff changeset
8 *
a61af66fc99e Initial load
duke
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load
duke
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load
duke
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load
duke
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load
duke
parents:
diff changeset
13 * accompanied this code).
a61af66fc99e Initial load
duke
parents:
diff changeset
14 *
a61af66fc99e Initial load
duke
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load
duke
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load
duke
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load
duke
parents:
diff changeset
18 *
1552
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 579
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 579
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: 579
diff changeset
21 * questions.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
22 *
a61af66fc99e Initial load
duke
parents:
diff changeset
23 */
a61af66fc99e Initial load
duke
parents:
diff changeset
24
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
26 #include "gc_implementation/shared/cSpaceCounters.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
27 #include "gc_implementation/shared/vmGCOperations.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
28 #include "gc_interface/collectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
29 #include "memory/blockOffsetTable.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
30 #include "memory/compactPermGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
31 #include "memory/gcLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
32 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
33 #include "memory/genCollectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
34 #include "memory/generation.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
35 #include "memory/permGen.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
36 #include "memory/universe.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
37 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
38 #include "runtime/java.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1839
diff changeset
39 #include "runtime/vmThread.hpp"
0
a61af66fc99e Initial load
duke
parents:
diff changeset
40
1839
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
41 HeapWord* PermGen::request_expand_and_allocate(Generation* gen, size_t size,
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
42 GCCause::Cause prev_cause) {
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
43 if (gen->capacity() < _capacity_expansion_limit ||
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
44 prev_cause != GCCause::_no_gc || UseG1GC) { // last disjunct is a temporary hack for G1
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
45 return gen->expand_and_allocate(size, false);
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
46 }
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
47 // We have reached the limit of capacity expansion where
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
48 // we will not expand further until a GC is done; request denied.
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
49 return NULL;
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
50 }
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
51
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
52 HeapWord* PermGen::mem_allocate_in_gen(size_t size, Generation* gen) {
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
53 GCCause::Cause next_cause = GCCause::_permanent_generation_full;
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
54 GCCause::Cause prev_cause = GCCause::_no_gc;
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
55 unsigned int gc_count_before, full_gc_count_before;
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
56 HeapWord* obj;
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
57
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
58 for (;;) {
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
59 {
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
60 MutexLocker ml(Heap_lock);
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
61 if ((obj = gen->allocate(size, false)) != NULL) {
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
62 return obj;
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
63 }
1839
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
64 // Attempt to expand and allocate the requested space:
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
65 // specific subtypes may use specific policy to either expand
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
66 // or not. The default policy (see above) is to expand until
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
67 // _capacity_expansion_limit, and no further unless a GC is done.
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
68 // Concurrent collectors may decide to kick off a concurrent
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
69 // collection under appropriate conditions.
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
70 obj = request_expand_and_allocate(gen, size, prev_cause);
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
71
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
72 if (obj != NULL || prev_cause == GCCause::_last_ditch_collection) {
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
73 return obj;
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
74 }
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
75 if (GC_locker::is_active_and_needs_gc()) {
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
76 // If this thread is not in a jni critical section, we stall
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
77 // the requestor until the critical section has cleared and
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
78 // GC allowed. When the critical section clears, a GC is
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
79 // initiated by the last thread exiting the critical section; so
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
80 // we retry the allocation sequence from the beginning of the loop,
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
81 // rather than causing more, now probably unnecessary, GC attempts.
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
82 JavaThread* jthr = JavaThread::current();
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
83 if (!jthr->in_critical()) {
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
84 MutexUnlocker mul(Heap_lock);
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
85 // Wait for JNI critical section to be exited
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
86 GC_locker::stall_until_clear();
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
87 continue;
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
88 } else {
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
89 if (CheckJNICalls) {
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
90 fatal("Possible deadlock due to allocating while"
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
91 " in jni critical section");
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
92 }
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
93 return NULL;
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
94 }
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
95 }
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
96 // Read the GC count while holding the Heap_lock
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
97 gc_count_before = SharedHeap::heap()->total_collections();
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
98 full_gc_count_before = SharedHeap::heap()->total_full_collections();
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
99 }
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
100
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
101 // Give up heap lock above, VMThread::execute below gets it back
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
102 VM_GenCollectForPermanentAllocation op(size, gc_count_before, full_gc_count_before,
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
103 next_cause);
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
104 VMThread::execute(&op);
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
105 if (!op.prologue_succeeded() || op.gc_locked()) {
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
106 assert(op.result() == NULL, "must be NULL if gc_locked() is true");
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
107 continue; // retry and/or stall as necessary
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
108 }
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
109 obj = op.result();
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
110 assert(obj == NULL || SharedHeap::heap()->is_in_reserved(obj),
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
111 "result not in heap");
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
112 if (obj != NULL) {
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
113 return obj;
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
114 }
480
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
115 prev_cause = next_cause;
d249b360e026 6782457: CMS: Livelock in CompactibleFreeListSpace::block_size()
ysr
parents: 196
diff changeset
116 next_cause = GCCause::_last_ditch_collection;
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
117 }
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
118 }
c0492d52d55b 6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents: 0
diff changeset
119
0
a61af66fc99e Initial load
duke
parents:
diff changeset
120 CompactingPermGen::CompactingPermGen(ReservedSpace rs,
a61af66fc99e Initial load
duke
parents:
diff changeset
121 ReservedSpace shared_rs,
a61af66fc99e Initial load
duke
parents:
diff changeset
122 size_t initial_byte_size,
a61af66fc99e Initial load
duke
parents:
diff changeset
123 GenRemSet* remset,
a61af66fc99e Initial load
duke
parents:
diff changeset
124 PermanentGenerationSpec* perm_spec)
a61af66fc99e Initial load
duke
parents:
diff changeset
125 {
a61af66fc99e Initial load
duke
parents:
diff changeset
126 CompactingPermGenGen* g =
a61af66fc99e Initial load
duke
parents:
diff changeset
127 new CompactingPermGenGen(rs, shared_rs, initial_byte_size, -1, remset,
a61af66fc99e Initial load
duke
parents:
diff changeset
128 NULL, perm_spec);
a61af66fc99e Initial load
duke
parents:
diff changeset
129 if (g == NULL)
a61af66fc99e Initial load
duke
parents:
diff changeset
130 vm_exit_during_initialization("Could not allocate a CompactingPermGen");
a61af66fc99e Initial load
duke
parents:
diff changeset
131 _gen = g;
a61af66fc99e Initial load
duke
parents:
diff changeset
132
a61af66fc99e Initial load
duke
parents:
diff changeset
133 g->initialize_performance_counters();
a61af66fc99e Initial load
duke
parents:
diff changeset
134
a61af66fc99e Initial load
duke
parents:
diff changeset
135 _capacity_expansion_limit = g->capacity() + MaxPermHeapExpansion;
a61af66fc99e Initial load
duke
parents:
diff changeset
136 }
a61af66fc99e Initial load
duke
parents:
diff changeset
137
a61af66fc99e Initial load
duke
parents:
diff changeset
138 HeapWord* CompactingPermGen::mem_allocate(size_t size) {
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
139 return mem_allocate_in_gen(size, _gen);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
140 }
a61af66fc99e Initial load
duke
parents:
diff changeset
141
a61af66fc99e Initial load
duke
parents:
diff changeset
142 void CompactingPermGen::compute_new_size() {
a61af66fc99e Initial load
duke
parents:
diff changeset
143 size_t desired_capacity = align_size_up(_gen->used(), MinPermHeapExpansion);
a61af66fc99e Initial load
duke
parents:
diff changeset
144 if (desired_capacity < PermSize) {
a61af66fc99e Initial load
duke
parents:
diff changeset
145 desired_capacity = PermSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
146 }
a61af66fc99e Initial load
duke
parents:
diff changeset
147 if (_gen->capacity() > desired_capacity) {
a61af66fc99e Initial load
duke
parents:
diff changeset
148 _gen->shrink(_gen->capacity() - desired_capacity);
a61af66fc99e Initial load
duke
parents:
diff changeset
149 }
1839
e41cd7fd68a6 6794422: Perm gen expansion policy for concurrent collectors
ysr
parents: 1552
diff changeset
150 set_capacity_expansion_limit(_gen->capacity() + MaxPermHeapExpansion);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
151 }