1 /*
   2  * Copyright (c) 2001, 2009, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_concurrentZFThread.cpp.incl"





  27 
  28 // ======= Concurrent Zero-Fill Thread ========
  29 
  30 // The CM thread is created when the G1 garbage collector is used
  31 
  32 int ConcurrentZFThread::_region_allocs = 0;
  33 int ConcurrentZFThread::_sync_zfs = 0;
  34 int ConcurrentZFThread::_zf_waits = 0;
  35 int ConcurrentZFThread::_regions_filled = 0;
  36 
  37 ConcurrentZFThread::ConcurrentZFThread() :
  38   ConcurrentGCThread()
  39 {
  40   create_and_start();
  41 }
  42 
  43 void ConcurrentZFThread::wait_for_ZF_completed(HeapRegion* hr) {
  44   assert(ZF_mon->owned_by_self(), "Precondition.");
  45   note_zf_wait();
  46   while (hr->zero_fill_state() == HeapRegion::ZeroFilling) {

   1 /*
   2  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/g1/concurrentZFThread.hpp"
  27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  28 #include "gc_implementation/g1/heapRegion.hpp"
  29 #include "memory/space.inline.hpp"
  30 #include "runtime/mutexLocker.hpp"
  31 #include "utilities/copy.hpp"
  32 
  33 // ======= Concurrent Zero-Fill Thread ========
  34 
  35 // The CM thread is created when the G1 garbage collector is used
  36 
  37 int ConcurrentZFThread::_region_allocs = 0;
  38 int ConcurrentZFThread::_sync_zfs = 0;
  39 int ConcurrentZFThread::_zf_waits = 0;
  40 int ConcurrentZFThread::_regions_filled = 0;
  41 
  42 ConcurrentZFThread::ConcurrentZFThread() :
  43   ConcurrentGCThread()
  44 {
  45   create_and_start();
  46 }
  47 
  48 void ConcurrentZFThread::wait_for_ZF_completed(HeapRegion* hr) {
  49   assert(ZF_mon->owned_by_self(), "Precondition.");
  50   note_zf_wait();
  51   while (hr->zero_fill_state() == HeapRegion::ZeroFilling) {