rev 60584 : imported patch 8245511-ihop
rev 60585 : [mq]: 8245511-rev1

   1 /*
   2  * Copyright (c) 2020, Amazon.com, Inc. 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 #ifndef SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP
  26 #define SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP
  27 
  28 #include "gc/g1/heapRegion.hpp"
  29 #include "memory/allocation.hpp"
  30 


  31 // Track allocation details in the old generation.
  32 class G1OldGenAllocationTracker : public CHeapObj<mtGC> {
  33   // New bytes allocated in old gen between the end of the last GC and
  34   // the end of the GC before that.
  35   size_t _last_cycle_old_bytes;
  36   // The number of seconds between the end of the last GC and
  37   // the end of the GC before that.
  38   double _last_cycle_duration;
  39 
  40   size_t _allocated_bytes_since_last_gc;

  41 
  42   void reset_cycle_after_gc() {
  43     _last_cycle_old_bytes = _allocated_bytes_since_last_gc;
  44     _allocated_bytes_since_last_gc = 0;
  45   }
  46 
  47 public:
  48   G1OldGenAllocationTracker();
  49   // Add the given number of bytes to the total number of allocated bytes in the old gen.
  50   void add_allocated_bytes_since_last_gc(size_t bytes) { _allocated_bytes_since_last_gc += bytes; }

  51 
  52   size_t last_cycle_old_bytes() { return _last_cycle_old_bytes; }




  53 
  54   double last_cycle_duration() { return _last_cycle_duration; }

  55 
  56   // Reset stats after a collection.
  57   void reset_after_full_gc();
  58   void reset_after_young_gc(double allocation_duration_s);
  59 };
  60 
  61 #endif // SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP
--- EOF ---