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 #include "precompiled.hpp"
  26 #include "gc/g1/g1OldGenAllocationTracker.hpp"
  27 #include "logging/log.hpp"
  28 
  29 G1OldGenAllocationTracker::G1OldGenAllocationTracker() :
  30   _last_period_old_gen_bytes(0),
  31   _last_period_old_gen_growth(0),
  32   _humongous_bytes_after_last_gc(0),
  33   _allocated_bytes_since_last_gc(0),
  34   _allocated_humongous_bytes_since_last_gc(0) {
  35 }
  36 
  37 void G1OldGenAllocationTracker::reset_after_gc(size_t humongous_bytes_after_gc) {
  38   // Calculate actual increase in old, taking eager reclaim into consideration.
  39   size_t last_period_humongous_increase = 0;
  40   if (humongous_bytes_after_gc > _humongous_bytes_after_last_gc) {
  41     last_period_humongous_increase = humongous_bytes_after_gc - _humongous_bytes_after_last_gc;
  42     assert(last_period_humongous_increase <= _allocated_humongous_bytes_since_last_gc,
  43            "Increase larger than allocated " SIZE_FORMAT " <= " SIZE_FORMAT,
  44            last_period_humongous_increase, _allocated_humongous_bytes_since_last_gc);
  45   }
  46   _last_period_old_gen_growth = _allocated_bytes_since_last_gc + last_period_humongous_increase;
  47 
  48   // Calculate and record needed values.
  49   _last_period_old_gen_bytes = _allocated_bytes_since_last_gc + _allocated_humongous_bytes_since_last_gc;
  50   _humongous_bytes_after_last_gc = humongous_bytes_after_gc;
  51 
  52   log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, "
  53                               "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B,"
  54                               "old gen growth: " SIZE_FORMAT "B.",
  55                               _allocated_bytes_since_last_gc,
  56                               _allocated_humongous_bytes_since_last_gc,
  57                               _last_period_old_gen_growth);
  58 
  59   // Reset for next mutator period.
  60   _allocated_bytes_since_last_gc = 0;
  61   _allocated_humongous_bytes_since_last_gc = 0;
  62 }
--- EOF ---