Mercurial > hg > graal-compiler
view src/share/vm/runtime/sweeper.hpp @ 616:4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
6720334: G1: don't update RSets of collection set regions during an evacuation pause
Summary: Introduced a deferred update mechanism for delaying the rset updates during the collection pause
Reviewed-by: apetrusenko, tonyp
author | iveresov |
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date | Fri, 06 Mar 2009 13:50:14 -0800 |
parents | a61af66fc99e |
children | 5f24d0319e54 |
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/* * Copyright 1997-2005 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. * */ // An NmethodSweeper is an incremental cleaner for: // - cleanup inline caches // - reclamation of unreferences zombie nmethods // class NMethodSweeper : public AllStatic { static long _traversals; // Stack traversal count static CodeBlob* _current; // Current nmethod static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache static int _invocations; // No. of invocations left until we are completed with this pass static bool _rescan; // Indicates that we should do a full rescan of the // of the code cache looking for work to do. static int _locked_seen; // Number of locked nmethods encountered during the scan static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack static void process_nmethod(nmethod *nm); public: static long traversal_count() { return _traversals; } static void sweep(); // Invoked at the end of each safepoint static void notify(nmethod* nm) { // Perform a full scan of the code cache from the beginning. No // need to synchronize the setting of this flag since it only // changes to false at safepoint so we can never overwrite it with false. _rescan = true; } };