Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/vm_operations_g1.hpp @ 1088:3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
Summary: ScavengeALot now causes an incremental (but possibly partially young, in the G1 sense) collection. Some such collections may be abandoned on account of MMU specs. Band-aided a native leak associated with abandoned pauses, as well as an MMU tracker overflow related to frequent scavenge events in the face of a large MMU denominator interval; the latter is protected by a product flag that defaults to false.
Reviewed-by: tonyp
| author | ysr |
|---|---|
| date | Thu, 19 Nov 2009 13:43:25 -0800 |
| parents | bd02caa94611 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 844 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 342 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // VM_operations for the G1 collector. | |
| 26 // VM_GC_Operation: | |
| 27 // - VM_CGC_Operation | |
| 28 // - VM_G1CollectFull | |
| 29 // - VM_G1CollectForAllocation | |
| 30 // - VM_G1IncCollectionPause | |
| 31 // - VM_G1PopRegionCollectionPause | |
| 32 | |
| 33 class VM_G1CollectFull: public VM_GC_Operation { | |
| 34 private: | |
| 35 public: | |
| 36 VM_G1CollectFull(int gc_count_before, | |
| 37 GCCause::Cause gc_cause) | |
| 38 : VM_GC_Operation(gc_count_before) | |
| 39 { | |
| 40 _gc_cause = gc_cause; | |
| 41 } | |
| 42 ~VM_G1CollectFull() {} | |
| 43 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } | |
| 44 virtual void doit(); | |
| 45 virtual const char* name() const { | |
| 46 return "full garbage-first collection"; | |
| 47 } | |
| 48 }; | |
| 49 | |
| 50 class VM_G1CollectForAllocation: public VM_GC_Operation { | |
| 51 private: | |
| 52 HeapWord* _res; | |
| 53 size_t _size; // size of object to be allocated | |
| 54 public: | |
| 55 VM_G1CollectForAllocation(size_t size, int gc_count_before) | |
| 56 : VM_GC_Operation(gc_count_before) { | |
| 57 _size = size; | |
| 58 _res = NULL; | |
| 59 } | |
| 60 ~VM_G1CollectForAllocation() {} | |
| 61 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } | |
| 62 virtual void doit(); | |
| 63 virtual const char* name() const { | |
| 64 return "garbage-first collection to satisfy allocation"; | |
| 65 } | |
| 66 HeapWord* result() { return _res; } | |
| 67 }; | |
| 68 | |
| 69 class VM_G1IncCollectionPause: public VM_GC_Operation { | |
| 70 public: | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
844
diff
changeset
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71 VM_G1IncCollectionPause(int gc_count_before, |
|
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
844
diff
changeset
|
72 GCCause::Cause gc_cause = GCCause::_g1_inc_collection_pause) : |
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3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
844
diff
changeset
|
73 VM_GC_Operation(gc_count_before) { _gc_cause = gc_cause; } |
| 342 | 74 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } |
| 75 virtual void doit(); | |
| 76 virtual const char* name() const { | |
| 77 return "garbage-first incremental collection pause"; | |
| 78 } | |
| 79 }; | |
| 80 | |
| 81 // Concurrent GC stop-the-world operations such as initial and final mark; | |
| 82 // consider sharing these with CMS's counterparts. | |
| 83 class VM_CGC_Operation: public VM_Operation { | |
| 84 VoidClosure* _cl; | |
| 85 const char* _printGCMessage; | |
| 86 public: | |
| 87 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) : | |
| 88 _cl(cl), | |
| 89 _printGCMessage(printGCMsg) | |
| 90 {} | |
| 91 | |
| 92 ~VM_CGC_Operation() {} | |
| 93 | |
| 94 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } | |
| 95 virtual void doit(); | |
| 96 virtual bool doit_prologue(); | |
| 97 virtual void doit_epilogue(); | |
| 98 virtual const char* name() const { | |
| 99 return "concurrent gc"; | |
| 100 } | |
| 101 }; |