1 /*
   2  * Copyright (c) 2016, 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 "gc/cms/cmsGCServicabilitySupport.hpp"
  26 #include "gc/cms/compactibleFreeListSpace.hpp"
  27 #include "gc/cms/concurrentMarkSweepGeneration.hpp"
  28 #include "gc/cms/parNewGeneration.hpp"
  29 #include "gc/shared/genCollectedHeap.hpp"
  30 #include "services/memoryManager.hpp"
  31 #include "services/memoryPool.hpp"
  32 
  33 class ParNewMemoryManager : public GCMemoryManager {
  34 private:
  35 public:
  36   ParNewMemoryManager() : GCMemoryManager() {}
  37 
  38   const char* name() { return "ParNew"; }
  39 };
  40 
  41 class CMSMemoryManager : public GCMemoryManager {
  42 private:
  43 public:
  44   CMSMemoryManager() : GCMemoryManager() {}
  45 
  46   const char* name() { return "ConcurrentMarkSweep";}
  47 };
  48 
  49 GCMemoryManager* CMSGCServicabilitySupport::create_minor_gc_manager() {
  50   return new ParNewMemoryManager();
  51 }
  52 
  53 GCMemoryManager* CMSGCServicabilitySupport::create_major_gc_manager() {
  54   return new CMSMemoryManager();
  55 }
  56 
  57 class CompactibleFreeListSpacePool : public CollectedMemoryPool {
  58 private:
  59   CompactibleFreeListSpace* _space;
  60 public:
  61   CompactibleFreeListSpacePool(CompactibleFreeListSpace* space,
  62                                const char* name,
  63                                PoolType type,
  64                                size_t max_size,
  65                                bool support_usage_threshold) :
  66     CollectedMemoryPool(name, type, space->capacity(), max_size,
  67                         support_usage_threshold), _space(space) {
  68   }
  69 
  70   MemoryUsage get_memory_usage() {
  71     size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  72     size_t used      = used_in_bytes();
  73     size_t committed = _space->capacity();
  74     
  75     return MemoryUsage(initial_size(), used, committed, maxSize);
  76   }
  77 
  78   size_t used_in_bytes() {
  79     return _space->used();
  80   }
  81 };
  82 
  83 void CMSGCServicabilitySupport::add_memory_pools(GrowableArray<MemoryPool*>* pools_list,
  84                                                  GCMemoryManager* minor_mgr,
  85                                                  GCMemoryManager* major_mgr) {
  86 
  87   GenCollectedHeap* heap = GenCollectedHeap::heap();
  88   ParNewGeneration* young_gen = (ParNewGeneration*) heap->young_gen();
  89   ContiguousSpacePool* eden = new ContiguousSpacePool(young_gen->eden(), "Par Eden Space", MemoryPool::Heap, young_gen->max_eden_size(), false);
  90   SurvivorContiguousSpacePool* survivor = new SurvivorContiguousSpacePool(young_gen, "Par Survivor Space", MemoryPool::Heap, young_gen->max_survivor_size(), false);
  91 
  92   ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) heap->old_gen();
  93   CompactibleFreeListSpacePool* old = new CompactibleFreeListSpacePool(cms->cmsSpace(), "CMS Old Gen", MemoryPool::Heap, cms->reserved().byte_size(), true);
  94 
  95   pools_list->append(eden);
  96   pools_list->append(survivor);
  97   pools_list->append(old);
  98 
  99   minor_mgr->add_pool(eden);
 100   major_mgr->add_pool(eden);
 101   minor_mgr->add_pool(survivor);
 102   major_mgr->add_pool(survivor);
 103   major_mgr->add_pool(old);
 104 }