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