Mercurial > hg > graal-jvmci-8
view src/share/vm/gc_implementation/g1/concurrentZFThread.hpp @ 1408:0ba67bb5392c
added c1x build directory, added MSVC Win64 project support
author | lstadler |
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date | Wed, 12 May 2010 15:01:05 +0200 |
parents | 035d2e036a9b |
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. * */ // The Concurrent ZF Thread. Performs concurrent zero-filling. class ConcurrentZFThread: public ConcurrentGCThread { friend class VMStructs; friend class ZeroFillRegionClosure; private: // Zero fill the heap region. void processHeapRegion(HeapRegion* r); // Stats // Allocation (protected by heap lock). static int _region_allocs; // Number of regions allocated static int _sync_zfs; // Synchronous zero-fills + static int _zf_waits; // Wait for conc zero-fill completion. // Number of regions CFZ thread fills. static int _regions_filled; double _vtime_start; // Initial virtual time. // These are static because the "print_summary_info" method is, and // it currently assumes there is only one ZF thread. We'll change when // we need to. static double _vtime_accum; // Initial virtual time. static double vtime_accum() { return _vtime_accum; } // Offer yield for GC. Returns true if yield occurred. bool offer_yield(); public: // Constructor ConcurrentZFThread(); // Main loop. virtual void run(); // Printing void print_on(outputStream* st) const; void print() const; // Waits until "r" has been zero-filled. Requires caller to hold the // ZF_mon. static void wait_for_ZF_completed(HeapRegion* r); // Get or clear the current unclean region. Should be done // while holding the ZF_needed_mon lock. // shutdown void stop(); // Stats static void note_region_alloc() {_region_allocs++; } static void note_sync_zfs() { _sync_zfs++; } static void note_zf_wait() { _zf_waits++; } static void note_region_filled() { _regions_filled++; } static void print_summary_info(); };