Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@1316cec51b4d (annotated)
src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp
Thu, 22 Apr 2010 10:02:38 -0700
- author
- johnc
- date
- Thu, 22 Apr 2010 10:02:38 -0700
- changeset 1829
- 1316cec51b4d
- parent 1301
- 18f526145aea
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6819061: G1: eliminate serial Other times that are proportional to the collection set length
6871109: G1: remove the concept of the scan only prefix
Summary: Removed scan only regions and associated code. The young portion of the collection set is now constructed incrementally - when a young region is retired as the current allocation region it is added to the collection set.
Reviewed-by: apetrusenko, iveresov, tonyp
| ysr@777 | 1 | /* |
| xdono@1279 | 2 | * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| ysr@777 | 21 | * have any questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | inline size_t G1RemSet::n_workers() { |
| ysr@777 | 26 | if (_g1->workers() != NULL) { |
| ysr@777 | 27 | return _g1->workers()->total_workers(); |
| ysr@777 | 28 | } else { |
| ysr@777 | 29 | return 1; |
| ysr@777 | 30 | } |
| ysr@777 | 31 | } |
| ysr@777 | 32 | |
| ysr@1280 | 33 | template <class T> inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, T* p) { |
| ysr@1280 | 34 | par_write_ref_nv(from, p, 0); |
| ysr@777 | 35 | } |
| ysr@777 | 36 | |
| ysr@777 | 37 | inline bool HRInto_G1RemSet::self_forwarded(oop obj) { |
| ysr@777 | 38 | bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); |
| ysr@777 | 39 | return result; |
| ysr@777 | 40 | } |
| ysr@777 | 41 | |
| ysr@1280 | 42 | template <class T> inline void HRInto_G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) { |
| ysr@1280 | 43 | oop obj = oopDesc::load_decode_heap_oop(p); |
| ysr@777 | 44 | #ifdef ASSERT |
| ysr@777 | 45 | // can't do because of races |
| ysr@777 | 46 | // assert(obj == NULL || obj->is_oop(), "expected an oop"); |
| ysr@777 | 47 | |
| ysr@777 | 48 | // Do the safe subset of is_oop |
| ysr@777 | 49 | if (obj != NULL) { |
| ysr@777 | 50 | #ifdef CHECK_UNHANDLED_OOPS |
| ysr@777 | 51 | oopDesc* o = obj.obj(); |
| ysr@777 | 52 | #else |
| ysr@777 | 53 | oopDesc* o = obj; |
| ysr@777 | 54 | #endif // CHECK_UNHANDLED_OOPS |
| ysr@777 | 55 | assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); |
| ysr@777 | 56 | assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); |
| ysr@777 | 57 | } |
| ysr@777 | 58 | #endif // ASSERT |
| ysr@777 | 59 | assert(from == NULL || from->is_in_reserved(p), |
| ysr@777 | 60 | "p is not in from"); |
| ysr@777 | 61 | HeapRegion* to = _g1->heap_region_containing(obj); |
| ysr@777 | 62 | // The test below could be optimized by applying a bit op to to and from. |
| ysr@777 | 63 | if (to != NULL && from != NULL && from != to) { |
| iveresov@1051 | 64 | // There is a tricky infinite loop if we keep pushing |
| iveresov@1051 | 65 | // self forwarding pointers onto our _new_refs list. |
| iveresov@1051 | 66 | // The _par_traversal_in_progress flag is true during the collection pause, |
| iveresov@1051 | 67 | // false during the evacuation failure handing. |
| iveresov@1051 | 68 | if (_par_traversal_in_progress && |
| iveresov@1051 | 69 | to->in_collection_set() && !self_forwarded(obj)) { |
| ysr@1280 | 70 | _new_refs[tid]->push((void*)p); |
| iveresov@1051 | 71 | // Deferred updates to the Cset are either discarded (in the normal case), |
| iveresov@1051 | 72 | // or processed (if an evacuation failure occurs) at the end |
| iveresov@1051 | 73 | // of the collection. |
| iveresov@1051 | 74 | // See HRInto_G1RemSet::cleanup_after_oops_into_collection_set_do(). |
| apetrusenko@1112 | 75 | } else { |
| ysr@777 | 76 | #if G1_REM_SET_LOGGING |
| ysr@777 | 77 | gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" |
| ysr@777 | 78 | " for region [" PTR_FORMAT ", " PTR_FORMAT ")", |
| ysr@777 | 79 | p, obj, |
| ysr@777 | 80 | to->bottom(), to->end()); |
| ysr@777 | 81 | #endif |
| ysr@777 | 82 | assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
| apetrusenko@1112 | 83 | to->rem_set()->add_reference(p, tid); |
| ysr@777 | 84 | } |
| ysr@777 | 85 | } |
| ysr@777 | 86 | } |
| apetrusenko@1061 | 87 | |
| ysr@1280 | 88 | template <class T> inline void UpdateRSOopClosure::do_oop_work(T* p) { |
| apetrusenko@1061 | 89 | assert(_from != NULL, "from region must be non-NULL"); |
| apetrusenko@1061 | 90 | _rs->par_write_ref(_from, p, _worker_i); |
| apetrusenko@1061 | 91 | } |
