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src/hotspot/share/gc/parallel/asPSOldGen.cpp

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rev 57486 : imported patch 8235860-remove-serial-old-gc
   1 /*
   2  * Copyright (c) 2003, 2015, 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/parallel/asPSOldGen.hpp"
  27 #include "gc/parallel/parallelScavengeHeap.hpp"
  28 #include "gc/parallel/psAdaptiveSizePolicy.hpp"
  29 #include "gc/parallel/psMarkSweepDecorator.hpp"
  30 #include "gc/shared/cardTableBarrierSet.hpp"
  31 #include "gc/shared/genArguments.hpp"
  32 #include "oops/oop.inline.hpp"
  33 #include "runtime/java.hpp"
  34 #include "utilities/align.hpp"
  35 
  36 // Whereas PSOldGen takes the maximum size of the generation
  37 // (which doesn't change in the case of PSOldGen) as a parameter,
  38 // ASPSOldGen takes the upper limit on the size of
  39 // the generation as a parameter.  In ASPSOldGen the
  40 // maximum size of the generation can change as the boundary
  41 // moves.  The "maximum size of the generation" is still a valid
  42 // concept since the generation can grow and shrink within that
  43 // maximum.  There are lots of useful checks that use that
  44 // maximum.  In PSOldGen the method max_gen_size() returns
  45 // _max_gen_size (as set by the PSOldGen constructor).  This
  46 // is how it always worked.  In ASPSOldGen max_gen_size()
  47 // returned the size of the reserved space for the generation.
  48 // That can change as the boundary moves.  Below the limit of
  49 // the size of the generation is passed to the PSOldGen constructor


   1 /*
   2  * Copyright (c) 2003, 2020, 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/parallel/asPSOldGen.hpp"
  27 #include "gc/parallel/parallelScavengeHeap.hpp"
  28 #include "gc/parallel/psAdaptiveSizePolicy.hpp"

  29 #include "gc/shared/cardTableBarrierSet.hpp"
  30 #include "gc/shared/genArguments.hpp"
  31 #include "oops/oop.inline.hpp"
  32 #include "runtime/java.hpp"
  33 #include "utilities/align.hpp"
  34 
  35 // Whereas PSOldGen takes the maximum size of the generation
  36 // (which doesn't change in the case of PSOldGen) as a parameter,
  37 // ASPSOldGen takes the upper limit on the size of
  38 // the generation as a parameter.  In ASPSOldGen the
  39 // maximum size of the generation can change as the boundary
  40 // moves.  The "maximum size of the generation" is still a valid
  41 // concept since the generation can grow and shrink within that
  42 // maximum.  There are lots of useful checks that use that
  43 // maximum.  In PSOldGen the method max_gen_size() returns
  44 // _max_gen_size (as set by the PSOldGen constructor).  This
  45 // is how it always worked.  In ASPSOldGen max_gen_size()
  46 // returned the size of the reserved space for the generation.
  47 // That can change as the boundary moves.  Below the limit of
  48 // the size of the generation is passed to the PSOldGen constructor


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