1 /*
   2  * Copyright (c) 2007, 2010, 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  */
  24 
  25 # include "incls/_precompiled.incl"
  26 # include "incls/_cmsCollectorPolicy.cpp.incl"
  27 
  28 //
  29 // ConcurrentMarkSweepPolicy methods
  30 //
  31 
  32 ConcurrentMarkSweepPolicy::ConcurrentMarkSweepPolicy() {
  33   initialize_all();
  34 }
  35 
  36 void ConcurrentMarkSweepPolicy::initialize_generations() {
  37   initialize_perm_generation(PermGen::ConcurrentMarkSweep);
  38   _generations = new GenerationSpecPtr[number_of_generations()];
  39   if (_generations == NULL)
  40     vm_exit_during_initialization("Unable to allocate gen spec");
  41 
  42   if (ParNewGeneration::in_use()) {
  43     if (UseAdaptiveSizePolicy) {
  44       _generations[0] = new GenerationSpec(Generation::ASParNew,
  45                                            _initial_gen0_size, _max_gen0_size);
  46     } else {
  47       _generations[0] = new GenerationSpec(Generation::ParNew,
  48                                            _initial_gen0_size, _max_gen0_size);
  49     }
  50   } else {
  51     _generations[0] = new GenerationSpec(Generation::DefNew,
  52                                          _initial_gen0_size, _max_gen0_size);
  53   }
  54   if (UseAdaptiveSizePolicy) {
  55     _generations[1] = new GenerationSpec(Generation::ASConcurrentMarkSweep,
  56                             _initial_gen1_size, _max_gen1_size);
  57   } else {
  58     _generations[1] = new GenerationSpec(Generation::ConcurrentMarkSweep,
  59                             _initial_gen1_size, _max_gen1_size);
  60   }
  61 
  62   if (_generations[0] == NULL || _generations[1] == NULL) {
  63     vm_exit_during_initialization("Unable to allocate gen spec");
  64   }
  65 }
  66 
  67 void ConcurrentMarkSweepPolicy::initialize_size_policy(size_t init_eden_size,
  68                                                size_t init_promo_size,
  69                                                size_t init_survivor_size) {
  70   double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0;
  71   double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
  72   _size_policy = new CMSAdaptiveSizePolicy(init_eden_size,
  73                                            init_promo_size,
  74                                            init_survivor_size,
  75                                            max_gc_minor_pause_sec,
  76                                            max_gc_pause_sec,
  77                                            GCTimeRatio);
  78 }
  79 
  80 void ConcurrentMarkSweepPolicy::initialize_gc_policy_counters() {
  81   // initialize the policy counters - 2 collectors, 3 generations
  82   if (ParNewGeneration::in_use()) {
  83     _gc_policy_counters = new GCPolicyCounters("ParNew:CMS", 2, 3);
  84   }
  85   else {
  86     _gc_policy_counters = new GCPolicyCounters("Copy:CMS", 2, 3);
  87   }
  88 }
  89 
  90 // Returns true if the incremental mode is enabled.
  91 bool ConcurrentMarkSweepPolicy::has_soft_ended_eden()
  92 {
  93   return CMSIncrementalMode;
  94 }
  95 
  96 
  97 //
  98 // ASConcurrentMarkSweepPolicy methods
  99 //
 100 
 101 void ASConcurrentMarkSweepPolicy::initialize_gc_policy_counters() {
 102 
 103   assert(size_policy() != NULL, "A size policy is required");
 104   // initialize the policy counters - 2 collectors, 3 generations
 105   if (ParNewGeneration::in_use()) {
 106     _gc_policy_counters = new CMSGCAdaptivePolicyCounters("ParNew:CMS", 2, 3,
 107       size_policy());
 108   }
 109   else {
 110     _gc_policy_counters = new CMSGCAdaptivePolicyCounters("Copy:CMS", 2, 3,
 111       size_policy());
 112   }
 113 }