1 /*

     2  * Copyright (c) 2013, 2018, Red Hat, Inc. All rights reserved.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP

    25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP

    26 

    27 #include "gc/shared/collectorPolicy.hpp"

    28 #include "gc/shenandoah/shenandoahHeap.hpp"

    29 #include "gc/shenandoah/shenandoahTracer.hpp"

    30 #include "utilities/ostream.hpp"

    31 

    32 class ShenandoahCollectorPolicy: public CollectorPolicy {

    33 private:

    34   size_t _success_concurrent_gcs;

    35   size_t _success_degenerated_gcs;

    36   size_t _success_full_gcs;

    37   size_t _alloc_failure_degenerated;

    38   size_t _alloc_failure_degenerated_upgrade_to_full;

    39   size_t _alloc_failure_full;

    40   size_t _explicit_concurrent;

    41   size_t _explicit_full;

    42   size_t _implicit_concurrent;

    43   size_t _implicit_full;

    44   size_t _degen_points[ShenandoahHeap::_DEGENERATED_LIMIT];

    45 

    46   ShenandoahSharedFlag _in_shutdown;

    47 

    48   ShenandoahTracer* _tracer;

    49 

    50   size_t _cycle_counter;

    51 

    52 public:

    53   ShenandoahCollectorPolicy();

    54 

    55   void initialize_alignments();

    56 

    57   // TODO: This is different from gc_end: that one encompasses one VM operation.

    58   // These two encompass the entire cycle.

    59   void record_cycle_start();

    60 

    61   void record_success_concurrent();

    62   void record_success_degenerated();

    63   void record_success_full();

    64   void record_alloc_failure_to_degenerated(ShenandoahHeap::ShenandoahDegenPoint point);

    65   void record_alloc_failure_to_full();

    66   void record_degenerated_upgrade_to_full();

    67   void record_explicit_to_concurrent();

    68   void record_explicit_to_full();

    69   void record_implicit_to_concurrent();

    70   void record_implicit_to_full();

    71 

    72   void record_shutdown();

    73   bool is_at_shutdown();

    74 

    75   ShenandoahTracer* tracer() {return _tracer;}

    76 

    77   size_t cycle_counter() const;

    78 

    79   void print_gc_stats(outputStream* out) const;

    80 };

    81 

    82 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP