jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@063382f9b575 (annotated)

src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@063382f9b575 (annotated)

src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp

Fri, 29 Apr 2011 14:59:04 -0400

author: tonyp
date: Fri, 29 Apr 2011 14:59:04 -0400
changeset 2849: 063382f9b575
parent 2314: f95d63e2154a
child 3463: d30fa85f9994
permissions: -rw-r--r--

7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
Summary: We should only undirty cards after we decide that they are not on a young region, not before. The fix also includes improvements to the verify_dirty_region() method which print out which cards were not found dirty.
Reviewed-by: johnc, brutisso

 /*
  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP
 #include "gc_implementation/shared/concurrentGCThread.hpp"
 // 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()       { assert(!_in_progress, "cycle in progress"); _started = true;  }
   void clear_started()     { assert(_in_progress, "must be starting a cycle"); _started = false; }
   bool started()           { return _started;  }
   void set_in_progress()   { assert(_started, "must be starting a cycle"); _in_progress = true;  }
   void clear_in_progress() { assert(!_started, "must not be starting a new cycle"); _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();
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP

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src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@063382f9b575 (annotated)

src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp