Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp @ 1883:35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
Summary: When an entry is stolen, don't push it on the task queue but process it directly.
Reviewed-by: iveresov, ysr, jcoomes
| author | tonyp |
|---|---|
| date | Thu, 14 Oct 2010 10:38:14 -0400 |
| parents | c32059ef4dc0 |
| children | 878b57474103 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 1705 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 25 inline size_t G1RemSet::n_workers() { | |
| 26 if (_g1->workers() != NULL) { | |
| 27 return _g1->workers()->total_workers(); | |
| 28 } else { | |
| 29 return 1; | |
| 30 } | |
| 31 } | |
| 32 | |
| 1861 | 33 template <class T> |
| 34 inline void G1RemSet::write_ref_nv(HeapRegion* from, T* p) { | |
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35 par_write_ref_nv(from, p, 0); |
| 342 | 36 } |
| 37 | |
| 1861 | 38 inline bool G1RemSet::self_forwarded(oop obj) { |
| 342 | 39 bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); |
| 40 return result; | |
| 41 } | |
| 42 | |
| 1861 | 43 template <class T> |
| 44 inline void G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) { | |
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45 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 46 #ifdef ASSERT |
| 47 // can't do because of races | |
| 48 // assert(obj == NULL || obj->is_oop(), "expected an oop"); | |
| 49 | |
| 50 // Do the safe subset of is_oop | |
| 51 if (obj != NULL) { | |
| 52 #ifdef CHECK_UNHANDLED_OOPS | |
| 53 oopDesc* o = obj.obj(); | |
| 54 #else | |
| 55 oopDesc* o = obj; | |
| 56 #endif // CHECK_UNHANDLED_OOPS | |
| 57 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); | |
| 58 assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); | |
| 59 } | |
| 60 #endif // ASSERT | |
| 1705 | 61 |
| 62 assert(from == NULL || from->is_in_reserved(p), "p is not in from"); | |
| 63 | |
| 342 | 64 HeapRegion* to = _g1->heap_region_containing(obj); |
| 65 // The test below could be optimized by applying a bit op to to and from. | |
| 66 if (to != NULL && from != NULL && from != to) { | |
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67 // The _traversal_in_progress flag is true during the collection pause, |
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68 // false during the evacuation failure handling. This should avoid a |
| 1705 | 69 // potential loop if we were to add the card containing 'p' to the DCQS |
| 70 // that's used to regenerate the remembered sets for the collection set, | |
| 71 // in the event of an evacuation failure, here. The UpdateRSImmediate | |
| 72 // closure will eventally call this routine. | |
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73 if (_traversal_in_progress && |
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74 to->in_collection_set() && !self_forwarded(obj)) { |
| 1705 | 75 |
| 76 assert(_cset_rs_update_cl[tid] != NULL, "should have been set already"); | |
| 77 _cset_rs_update_cl[tid]->do_oop(p); | |
| 78 | |
| 79 // Deferred updates to the CSet are either discarded (in the normal case), | |
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80 // or processed (if an evacuation failure occurs) at the end |
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81 // of the collection. |
| 1861 | 82 // See G1RemSet::cleanup_after_oops_into_collection_set_do(). |
| 677 | 83 } else { |
| 342 | 84 #if G1_REM_SET_LOGGING |
| 85 gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" | |
| 86 " for region [" PTR_FORMAT ", " PTR_FORMAT ")", | |
| 87 p, obj, | |
| 88 to->bottom(), to->end()); | |
| 89 #endif | |
| 90 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); | |
| 677 | 91 to->rem_set()->add_reference(p, tid); |
| 342 | 92 } |
| 93 } | |
| 94 } | |
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95 |
| 1861 | 96 template <class T> |
| 97 inline void UpdateRSOopClosure::do_oop_work(T* p) { | |
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98 assert(_from != NULL, "from region must be non-NULL"); |
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99 _rs->par_write_ref(_from, p, _worker_i); |
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100 } |
| 1705 | 101 |
| 1861 | 102 template <class T> |
| 103 inline void UpdateRSetImmediate::do_oop_work(T* p) { | |
| 1705 | 104 assert(_from->is_in_reserved(p), "paranoia"); |
| 105 T heap_oop = oopDesc::load_heap_oop(p); | |
| 106 if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) { | |
| 107 _g1_rem_set->par_write_ref(_from, p, 0); | |
| 108 } | |
| 109 } | |
| 110 |