Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/concurrentMarkThread.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 | 23b1b27ac76c |
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 Mark GC Thread (could be several in the future). // This is copied from the Concurrent Mark Sweep GC Thread // Still under construction. class ConcurrentMark; class ConcurrentMarkThread: public ConcurrentGCThread { friend class VMStructs; double _vtime_start; // Initial virtual time. double _vtime_accum; // Accumulated virtual time. double _vtime_mark_accum; double _vtime_count_accum; public: virtual void run(); private: ConcurrentMark* _cm; volatile bool _started; volatile bool _in_progress; void sleepBeforeNextCycle(); static SurrogateLockerThread* _slt; public: // Constructor ConcurrentMarkThread(ConcurrentMark* cm); static void makeSurrogateLockerThread(TRAPS); static SurrogateLockerThread* slt() { return _slt; } // Printing void print_on(outputStream* st) const; void print() const; // Total virtual time so far. double vtime_accum(); // Marking virtual time so far double vtime_mark_accum(); // Counting virtual time so far. double vtime_count_accum() { return _vtime_count_accum; } ConcurrentMark* cm() { return _cm; } void set_started() { _started = true; } void clear_started() { _started = false; } bool started() { return _started; } void set_in_progress() { _in_progress = true; } void clear_in_progress() { _in_progress = false; } bool in_progress() { return _in_progress; } // This flag returns true from the moment a marking cycle is // initiated (during the initial-mark pause when started() is set) // to the moment when the cycle completes (just after the next // marking bitmap has been cleared and in_progress() is // cleared). While this flag is true we will not start another cycle // so that cycles do not overlap. We cannot use just in_progress() // as the CM thread might take some time to wake up before noticing // that started() is set and set in_progress(). bool during_cycle() { return started() || in_progress(); } // Yield for GC void yield(); // shutdown void stop(); };