jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/vm_operations

     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  */

    25 // VM_operations for the G1 collector.

    26 // VM_GC_Operation:

    27 //   - VM_CGC_Operation

    28 //   - VM_G1CollectFull

    29 //   - VM_G1CollectForAllocation

    30 //   - VM_G1IncCollectionPause

    31 //   - VM_G1PopRegionCollectionPause

    33 class VM_G1CollectFull: public VM_GC_Operation {

    34  public:

    35   VM_G1CollectFull(unsigned int gc_count_before,

    36                    unsigned int full_gc_count_before,

    37                    GCCause::Cause cause)

    38     : VM_GC_Operation(gc_count_before, full_gc_count_before) {

    39     _gc_cause = cause;

    40   }

    41   ~VM_G1CollectFull() {}

    42   virtual VMOp_Type type() const { return VMOp_G1CollectFull; }

    43   virtual void doit();

    44   virtual const char* name() const {

    45     return "full garbage-first collection";

    46   }

    47 };

    49 class VM_G1CollectForAllocation: public VM_GC_Operation {

    50  private:

    51   HeapWord*   _res;

    52   size_t      _size;                       // size of object to be allocated

    53  public:

    54   VM_G1CollectForAllocation(size_t size, int gc_count_before)

    55     : VM_GC_Operation(gc_count_before) {

    56     _size        = size;

    57     _res         = NULL;

    58   }

    59   ~VM_G1CollectForAllocation()        {}

    60   virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }

    61   virtual void doit();

    62   virtual const char* name() const {

    63     return "garbage-first collection to satisfy allocation";

    64   }

    65   HeapWord* result() { return _res; }

    66 };

    68 class VM_G1IncCollectionPause: public VM_GC_Operation {

    69 private:

    70   bool _should_initiate_conc_mark;

    71   double _target_pause_time_ms;

    72   unsigned int _full_collections_completed_before;

    73 public:

    74   VM_G1IncCollectionPause(unsigned int   gc_count_before,

    75                           bool           should_initiate_conc_mark,

    76                           double         target_pause_time_ms,

    77                           GCCause::Cause cause)

    78     : VM_GC_Operation(gc_count_before),

    79       _full_collections_completed_before(0),

    80       _should_initiate_conc_mark(should_initiate_conc_mark),

    81       _target_pause_time_ms(target_pause_time_ms) {

    82     guarantee(target_pause_time_ms > 0.0,

    83               err_msg("target_pause_time_ms = %1.6lf should be positive",

    84                       target_pause_time_ms));

    86     _gc_cause = cause;

    87   }

    88   virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }

    89   virtual void doit();

    90   virtual void doit_epilogue();

    91   virtual const char* name() const {

    92     return "garbage-first incremental collection pause";

    93   }

    94 };

    96 // Concurrent GC stop-the-world operations such as initial and final mark;

    97 // consider sharing these with CMS's counterparts.

    98 class VM_CGC_Operation: public VM_Operation {

    99   VoidClosure* _cl;

   100   const char* _printGCMessage;

   101  public:

   102   VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) :

   103     _cl(cl),

   104     _printGCMessage(printGCMsg)

   105     {}

   107   ~VM_CGC_Operation() {}

   109   virtual VMOp_Type type() const { return VMOp_CGC_Operation; }

   110   virtual void doit();

   111   virtual bool doit_prologue();

   112   virtual void doit_epilogue();

   113   virtual const char* name() const {

   114     return "concurrent gc";

   115   }

   116 };

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@5f429ee79634