Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp @ 1591:f16f1d7893de
6941378: G1: change default value of G1UseFixedWindowMMUTracker to true
Summary: Rather than changing the default value of the G1UseFixedWindowMMUTracker, the flag and associated guarantee have been removed.
Reviewed-by: jcoomes, tonyp, ysr
author | johnc |
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date | Mon, 24 May 2010 17:11:22 -0700 |
parents | 44f61c24ddab |
children | c18cbe5936b8 |
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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. * */ class FreeIdSet; // A closure class for processing card table entries. Note that we don't // require these closure objects to be stack-allocated. class CardTableEntryClosure: public CHeapObj { public: // Process the card whose card table entry is "card_ptr". If returns // "false", terminate the iteration early. virtual bool do_card_ptr(jbyte* card_ptr, int worker_i = 0) = 0; }; // A ptrQueue whose elements are "oops", pointers to object heads. class DirtyCardQueue: public PtrQueue { public: DirtyCardQueue(PtrQueueSet* qset_, bool perm = false) : PtrQueue(qset_, perm) { // Dirty card queues are always active. _active = true; } // Apply the closure to all elements, and reset the index to make the // buffer empty. If a closure application returns "false", return // "false" immediately, halting the iteration. If "consume" is true, // deletes processed entries from logs. bool apply_closure(CardTableEntryClosure* cl, bool consume = true, size_t worker_i = 0); // Apply the closure to all elements of "buf", down to "index" // (inclusive.) If returns "false", then a closure application returned // "false", and we return immediately. If "consume" is true, entries are // set to NULL as they are processed, so they will not be processed again // later. static bool apply_closure_to_buffer(CardTableEntryClosure* cl, void** buf, size_t index, size_t sz, bool consume = true, int worker_i = 0); void **get_buf() { return _buf;} void set_buf(void **buf) {_buf = buf;} size_t get_index() { return _index;} void reinitialize() { _buf = 0; _sz = 0; _index = 0;} }; class DirtyCardQueueSet: public PtrQueueSet { CardTableEntryClosure* _closure; DirtyCardQueue _shared_dirty_card_queue; // Override. bool mut_process_buffer(void** buf); // Protected by the _cbl_mon. FreeIdSet* _free_ids; // The number of completed buffers processed by mutator and rs thread, // respectively. jint _processed_buffers_mut; jint _processed_buffers_rs_thread; public: DirtyCardQueueSet(bool notify_when_complete = true); void initialize(Monitor* cbl_mon, Mutex* fl_lock, int process_completed_threshold, int max_completed_queue, Mutex* lock, PtrQueueSet* fl_owner = NULL); // The number of parallel ids that can be claimed to allow collector or // mutator threads to do card-processing work. static size_t num_par_ids(); static void handle_zero_index_for_thread(JavaThread* t); // Register "blk" as "the closure" for all queues. Only one such closure // is allowed. The "apply_closure_to_completed_buffer" method will apply // this closure to a completed buffer, and "iterate_closure_all_threads" // applies it to partially-filled buffers (the latter should only be done // with the world stopped). void set_closure(CardTableEntryClosure* closure); // If there is a registered closure for buffers, apply it to all entries // in all currently-active buffers. This should only be applied at a // safepoint. (Currently must not be called in parallel; this should // change in the future.) If "consume" is true, processed entries are // discarded. void iterate_closure_all_threads(bool consume = true, size_t worker_i = 0); // If there exists some completed buffer, pop it, then apply the // registered closure to all its elements, nulling out those elements // processed. If all elements are processed, returns "true". If no // completed buffers exist, returns false. If a completed buffer exists, // but is only partially completed before a "yield" happens, the // partially completed buffer (with its processed elements set to NULL) // is returned to the completed buffer set, and this call returns false. bool apply_closure_to_completed_buffer(int worker_i = 0, int stop_at = 0, bool during_pause = false); bool apply_closure_to_completed_buffer_helper(int worker_i, BufferNode* nd); BufferNode* get_completed_buffer(int stop_at); // Applies the current closure to all completed buffers, // non-consumptively. void apply_closure_to_all_completed_buffers(); DirtyCardQueue* shared_dirty_card_queue() { return &_shared_dirty_card_queue; } // If a full collection is happening, reset partial logs, and ignore // completed ones: the full collection will make them all irrelevant. void abandon_logs(); // If any threads have partial logs, add them to the global list of logs. void concatenate_logs(); void clear_n_completed_buffers() { _n_completed_buffers = 0;} jint processed_buffers_mut() { return _processed_buffers_mut; } jint processed_buffers_rs_thread() { return _processed_buffers_rs_thread; } };