ysr@777: /*
xdono@1014:  * Copyright 2001-2009 Sun Microsystems, Inc.  All Rights Reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
ysr@777:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777:  * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777:  * have any questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
ysr@777: // Forward decl
ysr@777: class ConcurrentG1RefineThread;
ysr@777: class G1RemSet;
ysr@777: 
apetrusenko@984: class ConcurrentG1Refine: public CHeapObj {
iveresov@1229:   ConcurrentG1RefineThread** _threads;
iveresov@1229:   int _n_threads;
ysr@777: 
ysr@777:   // The cache for card refinement.
ysr@777:   bool     _use_cache;
ysr@777:   bool     _def_use_cache;
ysr@777:   size_t _n_periods;
ysr@777:   size_t _total_cards;
ysr@777:   size_t _total_travs;
ysr@777: 
ysr@777:   unsigned char*  _card_counts;
ysr@777:   unsigned _n_card_counts;
ysr@777:   const jbyte* _ct_bot;
ysr@777:   unsigned* _cur_card_count_histo;
ysr@777:   unsigned* _cum_card_count_histo;
ysr@777:   jbyte**  _hot_cache;
ysr@777:   int      _hot_cache_size;
ysr@777:   int      _n_hot;
ysr@777:   int      _hot_cache_idx;
ysr@777: 
ysr@777:   // Returns the count of this card after incrementing it.
ysr@777:   int add_card_count(jbyte* card_ptr);
ysr@777: 
ysr@777:   void print_card_count_histo_range(unsigned* histo, int from, int to,
ysr@777:                                     float& cum_card_pct,
ysr@777:                                     float& cum_travs_pct);
ysr@777:  public:
ysr@777:   ConcurrentG1Refine();
ysr@777:   ~ConcurrentG1Refine();
ysr@777: 
ysr@777:   void init(); // Accomplish some initialization that has to wait.
iveresov@1229:   void stop();
ysr@777: 
iveresov@1229:   // Iterate over the conc refine threads
iveresov@1229:   void threads_do(ThreadClosure *tc);
ysr@777: 
ysr@777:   // If this is the first entry for the slot, writes into the cache and
ysr@777:   // returns NULL.  If it causes an eviction, returns the evicted pointer.
ysr@777:   // Otherwise, its a cache hit, and returns NULL.
ysr@777:   jbyte* cache_insert(jbyte* card_ptr);
ysr@777: 
ysr@777:   // Process the cached entries.
ysr@777:   void clean_up_cache(int worker_i, G1RemSet* g1rs);
ysr@777: 
ysr@777:   // Discard entries in the hot cache.
ysr@777:   void clear_hot_cache() {
ysr@777:     _hot_cache_idx = 0; _n_hot = 0;
ysr@777:   }
ysr@777: 
ysr@777:   bool hot_cache_is_empty() { return _n_hot == 0; }
ysr@777: 
ysr@777:   bool use_cache() { return _use_cache; }
ysr@777:   void set_use_cache(bool b) {
ysr@777:     if (b) _use_cache = _def_use_cache;
ysr@777:     else   _use_cache = false;
ysr@777:   }
ysr@777: 
ysr@777:   void clear_and_record_card_counts();
ysr@777:   void print_final_card_counts();
ysr@777: };