Mon, 03 Aug 2009 12:59:30 -0700
6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp
1 /*
2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
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 */
25 // The following OopClosure types get specialized versions of
26 // "oop_oop_iterate" that invoke the closures' do_oop methods
27 // non-virtually, using a mechanism defined in this file. Extend these
28 // macros in the obvious way to add specializations for new closures.
30 // Forward declarations.
31 enum G1Barrier {
32 G1BarrierNone, G1BarrierRS, G1BarrierEvac
33 };
35 template<bool do_gen_barrier, G1Barrier barrier,
36 bool do_mark_forwardee, bool skip_cset_test>
37 class G1ParCopyClosure;
38 class G1ParScanClosure;
40 typedef G1ParCopyClosure<false, G1BarrierEvac, false, true> G1ParScanHeapEvacClosure;
42 class FilterIntoCSClosure;
43 class FilterOutOfRegionClosure;
44 class FilterInHeapRegionAndIntoCSClosure;
45 class FilterAndMarkInHeapRegionAndIntoCSClosure;
47 #ifdef FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES
48 #error "FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES already defined."
49 #endif
51 #define FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES(f) \
52 f(G1ParScanHeapEvacClosure,_nv) \
53 f(G1ParScanClosure,_nv) \
54 f(FilterIntoCSClosure,_nv) \
55 f(FilterOutOfRegionClosure,_nv) \
56 f(FilterInHeapRegionAndIntoCSClosure,_nv) \
57 f(FilterAndMarkInHeapRegionAndIntoCSClosure,_nv)
59 #ifdef FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES
60 #error "FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES already defined."
61 #endif
63 #define FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(f)