Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/gc_implementation/g1/concurrentZFThread.hpp	Thu Jun 05 15:57:56 2008 -0700
     1.3 @@ -0,0 +1,85 @@
     1.4 +/*
     1.5 + * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +// The Concurrent ZF Thread.  Performs concurrent zero-filling.
    1.29 +
    1.30 +class ConcurrentZFThread: public ConcurrentGCThread {
    1.31 +  friend class VMStructs;
    1.32 +  friend class ZeroFillRegionClosure;
    1.33 +
    1.34 + private:
    1.35 +
    1.36 +  // Zero fill the heap region.
    1.37 +  void processHeapRegion(HeapRegion* r);
    1.38 +
    1.39 +  // Stats
    1.40 +  //   Allocation (protected by heap lock).
    1.41 +  static int _region_allocs;  // Number of regions allocated
    1.42 +  static int _sync_zfs;       //   Synchronous zero-fills +
    1.43 +  static int _zf_waits;      //   Wait for conc zero-fill completion.
    1.44 +
    1.45 +  // Number of regions CFZ thread fills.
    1.46 +  static int _regions_filled;
    1.47 +
    1.48 +  COTracker _co_tracker;
    1.49 +
    1.50 +  double _vtime_start;  // Initial virtual time.
    1.51 +
    1.52 +  // These are static because the "print_summary_info" method is, and
    1.53 +  // it currently assumes there is only one ZF thread.  We'll change when
    1.54 +  // we need to.
    1.55 +  static double _vtime_accum;  // Initial virtual time.
    1.56 +  static double vtime_accum() { return _vtime_accum; }
    1.57 +
    1.58 +  // Offer yield for GC.  Returns true if yield occurred.
    1.59 +  bool offer_yield();
    1.60 +
    1.61 + public:
    1.62 +  // Constructor
    1.63 +  ConcurrentZFThread();
    1.64 +
    1.65 +  // Main loop.
    1.66 +  virtual void run();
    1.67 +
    1.68 +  // Printing
    1.69 +  void print();
    1.70 +
    1.71 +  // Waits until "r" has been zero-filled.  Requires caller to hold the
    1.72 +  // ZF_mon.
    1.73 +  static void wait_for_ZF_completed(HeapRegion* r);
    1.74 +
    1.75 +  // Get or clear the current unclean region.  Should be done
    1.76 +  // while holding the ZF_needed_mon lock.
    1.77 +
    1.78 +  // shutdown
    1.79 +  static void stop();
    1.80 +
    1.81 +  // Stats
    1.82 +  static void note_region_alloc() {_region_allocs++; }
    1.83 +  static void note_sync_zfs() { _sync_zfs++; }
    1.84 +  static void note_zf_wait() { _zf_waits++; }
    1.85 +  static void note_region_filled() { _regions_filled++; }
    1.86 +
    1.87 +  static void print_summary_info();
    1.88 +};