Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp @ 794:315a5d70b295
6484957: G1: parallel concurrent refinement
6826318: G1: remove traversal-based refinement code
Summary: Removed traversal-based refinement code as it's no longer used. Made the concurrent refinement (queue-based) parallel.
Reviewed-by: tonyp
author | iveresov |
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date | Mon, 11 May 2009 16:30:56 -0700 |
parents | 0fbdb4381b99 |
children | 215f81b4d9b3 |
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/* * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // Forward decl class ConcurrentG1RefineThread; class G1RemSet; class ConcurrentG1Refine: public CHeapObj { ConcurrentG1RefineThread** _threads; int _n_threads; // The cache for card refinement. bool _use_cache; bool _def_use_cache; size_t _n_periods; size_t _total_cards; size_t _total_travs; unsigned char* _card_counts; unsigned _n_card_counts; const jbyte* _ct_bot; unsigned* _cur_card_count_histo; unsigned* _cum_card_count_histo; jbyte** _hot_cache; int _hot_cache_size; int _n_hot; int _hot_cache_idx; // Returns the count of this card after incrementing it. int add_card_count(jbyte* card_ptr); void print_card_count_histo_range(unsigned* histo, int from, int to, float& cum_card_pct, float& cum_travs_pct); public: ConcurrentG1Refine(); ~ConcurrentG1Refine(); void init(); // Accomplish some initialization that has to wait. void stop(); // Iterate over the conc refine threads void threads_do(ThreadClosure *tc); // If this is the first entry for the slot, writes into the cache and // returns NULL. If it causes an eviction, returns the evicted pointer. // Otherwise, its a cache hit, and returns NULL. jbyte* cache_insert(jbyte* card_ptr); // Process the cached entries. void clean_up_cache(int worker_i, G1RemSet* g1rs); // Discard entries in the hot cache. void clear_hot_cache() { _hot_cache_idx = 0; _n_hot = 0; } bool hot_cache_is_empty() { return _n_hot == 0; } bool use_cache() { return _use_cache; } void set_use_cache(bool b) { if (b) _use_cache = _def_use_cache; else _use_cache = false; } void clear_and_record_card_counts(); void print_final_card_counts(); };