annotate src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp @ 795:215f81b4d9b3

6841831: G1: assert(contains_reference(from),"We just added it!") fires Summary: During parallel rset updating we have to make sure that the worker ids of the refinement threads do not intersect with the worker ids that can be claimed by the mutator threads. Reviewed-by: tonyp
author iveresov
date Mon, 18 May 2009 11:52:46 -0700
parents 315a5d70b295
children 15c5903cf9e1
rev   line source
ysr@342 1 /*
xdono@579 2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
ysr@342 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@342 4 *
ysr@342 5 * This code is free software; you can redistribute it and/or modify it
ysr@342 6 * under the terms of the GNU General Public License version 2 only, as
ysr@342 7 * published by the Free Software Foundation.
ysr@342 8 *
ysr@342 9 * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@342 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@342 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ysr@342 12 * version 2 for more details (a copy is included in the LICENSE file that
ysr@342 13 * accompanied this code).
ysr@342 14 *
ysr@342 15 * You should have received a copy of the GNU General Public License version
ysr@342 16 * 2 along with this work; if not, write to the Free Software Foundation,
ysr@342 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@342 18 *
ysr@342 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@342 20 * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@342 21 * have any questions.
ysr@342 22 *
ysr@342 23 */
ysr@342 24
ysr@342 25 // Forward decl
ysr@342 26 class ConcurrentG1RefineThread;
ysr@342 27 class G1RemSet;
ysr@342 28
apetrusenko@549 29 class ConcurrentG1Refine: public CHeapObj {
iveresov@794 30 ConcurrentG1RefineThread** _threads;
iveresov@794 31 int _n_threads;
ysr@342 32 // The cache for card refinement.
ysr@342 33 bool _use_cache;
ysr@342 34 bool _def_use_cache;
ysr@342 35 size_t _n_periods;
ysr@342 36 size_t _total_cards;
ysr@342 37 size_t _total_travs;
ysr@342 38
ysr@342 39 unsigned char* _card_counts;
ysr@342 40 unsigned _n_card_counts;
ysr@342 41 const jbyte* _ct_bot;
ysr@342 42 unsigned* _cur_card_count_histo;
ysr@342 43 unsigned* _cum_card_count_histo;
ysr@342 44 jbyte** _hot_cache;
ysr@342 45 int _hot_cache_size;
ysr@342 46 int _n_hot;
ysr@342 47 int _hot_cache_idx;
ysr@342 48
ysr@342 49 // Returns the count of this card after incrementing it.
ysr@342 50 int add_card_count(jbyte* card_ptr);
ysr@342 51
ysr@342 52 void print_card_count_histo_range(unsigned* histo, int from, int to,
ysr@342 53 float& cum_card_pct,
ysr@342 54 float& cum_travs_pct);
ysr@342 55 public:
ysr@342 56 ConcurrentG1Refine();
ysr@342 57 ~ConcurrentG1Refine();
ysr@342 58
ysr@342 59 void init(); // Accomplish some initialization that has to wait.
iveresov@794 60 void stop();
ysr@342 61
iveresov@794 62 // Iterate over the conc refine threads
iveresov@794 63 void threads_do(ThreadClosure *tc);
ysr@342 64
ysr@342 65 // If this is the first entry for the slot, writes into the cache and
ysr@342 66 // returns NULL. If it causes an eviction, returns the evicted pointer.
ysr@342 67 // Otherwise, its a cache hit, and returns NULL.
ysr@342 68 jbyte* cache_insert(jbyte* card_ptr);
ysr@342 69
ysr@342 70 // Process the cached entries.
ysr@342 71 void clean_up_cache(int worker_i, G1RemSet* g1rs);
ysr@342 72
ysr@342 73 // Discard entries in the hot cache.
ysr@342 74 void clear_hot_cache() {
ysr@342 75 _hot_cache_idx = 0; _n_hot = 0;
ysr@342 76 }
ysr@342 77
ysr@342 78 bool hot_cache_is_empty() { return _n_hot == 0; }
ysr@342 79
ysr@342 80 bool use_cache() { return _use_cache; }
ysr@342 81 void set_use_cache(bool b) {
ysr@342 82 if (b) _use_cache = _def_use_cache;
ysr@342 83 else _use_cache = false;
ysr@342 84 }
ysr@342 85
ysr@342 86 void clear_and_record_card_counts();
ysr@342 87 void print_final_card_counts();
iveresov@795 88
iveresov@795 89 static size_t thread_num();
ysr@342 90 };