author | stefank |
Tue, 23 Nov 2010 13:22:55 -0800 | |
changeset 7397 | 5b173b4ca846 |
parent 6058 | 9c9aec6ab47d |
child 7398 | e4aa6d9bda09 |
permissions | -rw-r--r-- |
1374 | 1 |
/* |
7397 | 2 |
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
1374 | 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:
4458
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
4458
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:
4458
diff
changeset
|
21 |
* questions. |
1374 | 22 |
* |
23 |
*/ |
|
24 |
||
7397 | 25 |
#include "precompiled.hpp" |
26 |
#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
|
27 |
#include "gc_implementation/g1/g1CollectorPolicy.hpp" |
|
28 |
#include "gc_implementation/g1/vm_operations_g1.hpp" |
|
29 |
#include "gc_implementation/shared/isGCActiveMark.hpp" |
|
30 |
#include "runtime/interfaceSupport.hpp" |
|
1374 | 31 |
|
32 |
void VM_G1CollectForAllocation::doit() { |
|
33 |
JvmtiGCForAllocationMarker jgcm; |
|
34 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
35 |
_res = g1h->satisfy_failed_allocation(_size); |
|
36 |
assert(g1h->is_in_or_null(_res), "result not in heap"); |
|
37 |
} |
|
38 |
||
39 |
void VM_G1CollectFull::doit() { |
|
40 |
JvmtiGCFullMarker jgcm; |
|
41 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
42 |
GCCauseSetter x(g1h, _gc_cause); |
|
43 |
g1h->do_full_collection(false /* clear_all_soft_refs */); |
|
44 |
} |
|
45 |
||
46 |
void VM_G1IncCollectionPause::doit() { |
|
47 |
JvmtiGCForAllocationMarker jgcm; |
|
48 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
49 |
assert(!_should_initiate_conc_mark || |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
50 |
((_gc_cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) || |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
51 |
(_gc_cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent)), |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
52 |
"only a GC locker or a System.gc() induced GC should start a cycle"); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
53 |
|
4458
075a9ef4e467
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
3261
diff
changeset
|
54 |
GCCauseSetter x(g1h, _gc_cause); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
55 |
if (_should_initiate_conc_mark) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
56 |
// It's safer to read full_collections_completed() here, given |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
57 |
// that noone else will be updating it concurrently. Since we'll |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
58 |
// only need it if we're initiating a marking cycle, no point in |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
59 |
// setting it earlier. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
60 |
_full_collections_completed_before = g1h->full_collections_completed(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
61 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
62 |
// At this point we are supposed to start a concurrent cycle. We |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
63 |
// will do so if one is not already in progress. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
64 |
bool res = g1h->g1_policy()->force_initial_mark_if_outside_cycle(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
65 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
66 |
g1h->do_collection_pause_at_safepoint(_target_pause_time_ms); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
67 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
68 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
69 |
void VM_G1IncCollectionPause::doit_epilogue() { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
70 |
VM_GC_Operation::doit_epilogue(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
71 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
72 |
// If the pause was initiated by a System.gc() and |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
73 |
// +ExplicitGCInvokesConcurrent, we have to wait here for the cycle |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
74 |
// that just started (or maybe one that was already in progress) to |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
75 |
// finish. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
76 |
if (_gc_cause == GCCause::_java_lang_system_gc && |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
77 |
_should_initiate_conc_mark) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
78 |
assert(ExplicitGCInvokesConcurrent, |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
79 |
"the only way to be here is if ExplicitGCInvokesConcurrent is set"); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
80 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
81 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
82 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
83 |
// In the doit() method we saved g1h->full_collections_completed() |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
84 |
// in the _full_collections_completed_before field. We have to |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
85 |
// wait until we observe that g1h->full_collections_completed() |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
86 |
// has increased by at least one. This can happen if a) we started |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
87 |
// a cycle and it completes, b) a cycle already in progress |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
88 |
// completes, or c) a Full GC happens. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
89 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
90 |
// If the condition has already been reached, there's no point in |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
91 |
// actually taking the lock and doing the wait. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
92 |
if (g1h->full_collections_completed() <= |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
93 |
_full_collections_completed_before) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
94 |
// The following is largely copied from CMS |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
95 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
96 |
Thread* thr = Thread::current(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
97 |
assert(thr->is_Java_thread(), "invariant"); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
98 |
JavaThread* jt = (JavaThread*)thr; |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
99 |
ThreadToNativeFromVM native(jt); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
100 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
101 |
MutexLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
102 |
while (g1h->full_collections_completed() <= |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
103 |
_full_collections_completed_before) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
104 |
FullGCCount_lock->wait(Mutex::_no_safepoint_check_flag); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
105 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
106 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5547
diff
changeset
|
107 |
} |
1374 | 108 |
} |
109 |
||
110 |
void VM_CGC_Operation::doit() { |
|
111 |
gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
|
112 |
TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); |
|
113 |
TraceTime t(_printGCMessage, PrintGC, true, gclog_or_tty); |
|
114 |
SharedHeap* sh = SharedHeap::heap(); |
|
115 |
// This could go away if CollectedHeap gave access to _gc_is_active... |
|
116 |
if (sh != NULL) { |
|
117 |
IsGCActiveMark x; |
|
118 |
_cl->do_void(); |
|
119 |
} else { |
|
120 |
_cl->do_void(); |
|
121 |
} |
|
122 |
} |
|
123 |
||
124 |
bool VM_CGC_Operation::doit_prologue() { |
|
125 |
Heap_lock->lock(); |
|
126 |
SharedHeap::heap()->_thread_holds_heap_lock_for_gc = true; |
|
127 |
return true; |
|
128 |
} |
|
129 |
||
130 |
void VM_CGC_Operation::doit_epilogue() { |
|
131 |
SharedHeap::heap()->_thread_holds_heap_lock_for_gc = false; |
|
132 |
Heap_lock->unlock(); |
|
133 |
} |