1 /*
   2  * Copyright (c) 2015, 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 #include "precompiled.hpp"
  25 #include "gc/shared/collectorCounters.hpp"
  26 #include "gc/shared/generationCounters.hpp"
  27 #include "gc/shared/hSpaceCounters.hpp"
  28 #include "gc/shenandoah/shenandoahMonitoringSupport.hpp"
  29 #include "gc/shenandoah/shenandoahHeap.hpp"
  30 #include "gc/shenandoah/shenandoahHeapRegionCounters.hpp"
  31 #include "memory/metaspaceCounters.hpp"
  32 #include "services/memoryService.hpp"
  33 
  34 class ShenandoahYoungGenerationCounters : public GenerationCounters {
  35 public:
  36   ShenandoahYoungGenerationCounters() :
  37           GenerationCounters("Young", 0, 0, 0, (size_t)0, (size_t)0) {};
  38 
  39   virtual void update_all() {
  40     // no update
  41   }
  42 };
  43 
  44 class ShenandoahGenerationCounters : public GenerationCounters {
  45 private:
  46   ShenandoahHeap* _heap;
  47 public:
  48   ShenandoahGenerationCounters(ShenandoahHeap* heap) :
  49           GenerationCounters("Heap", 1, 1, heap->initial_capacity(), heap->max_capacity(), heap->committed()),
  50           _heap(heap)
  51   {};
  52 
  53   virtual void update_all() {
  54     _current_size->set_value(_heap->committed());
  55   }
  56 };
  57 
  58 ShenandoahMonitoringSupport::ShenandoahMonitoringSupport(ShenandoahHeap* heap) :
  59         _partial_counters(NULL),
  60         _full_counters(NULL)
  61 {
  62   // Collection counters do not fit Shenandoah very well.
  63   // We record partial cycles as "young", and full cycles (including full STW GC) as "old".
  64   _partial_counters  = new CollectorCounters("Shenandoah partial", 0);
  65   _full_counters     = new CollectorCounters("Shenandoah full",    1);
  66 
  67   // We report young gen as unused.
  68   _young_counters = new ShenandoahYoungGenerationCounters();
  69   _heap_counters  = new ShenandoahGenerationCounters(heap);
  70   _space_counters = new HSpaceCounters(_heap_counters->name_space(), "Heap", 0, heap->max_capacity(), heap->initial_capacity());
  71 
  72   _heap_region_counters = new ShenandoahHeapRegionCounters();
  73 }
  74 
  75 CollectorCounters* ShenandoahMonitoringSupport::stw_collection_counters() {
  76   return _full_counters;
  77 }
  78 
  79 CollectorCounters* ShenandoahMonitoringSupport::full_stw_collection_counters() {
  80   return _full_counters;
  81 }
  82 
  83 CollectorCounters* ShenandoahMonitoringSupport::concurrent_collection_counters() {
  84   return _full_counters;
  85 }
  86 
  87 CollectorCounters* ShenandoahMonitoringSupport::partial_collection_counters() {
  88   return _partial_counters;
  89 }
  90 
  91 void ShenandoahMonitoringSupport::update_counters() {
  92   MemoryService::track_memory_usage();
  93 
  94   if (UsePerfData) {
  95     ShenandoahHeap* heap = ShenandoahHeap::heap();
  96     size_t used = heap->used();
  97     size_t capacity = heap->capacity();
  98     _heap_counters->update_all();
  99     _space_counters->update_all(capacity, used);
 100     _heap_region_counters->update();
 101 
 102     MetaspaceCounters::update_performance_counters();
 103     CompressedClassSpaceCounters::update_performance_counters();
 104   }
 105 }