1 /*
   2  * Copyright (c) 2012, 2015, 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 #ifndef SHARE_VM_GC_SHARED_GCHEAPSUMMARY_HPP
  26 #define SHARE_VM_GC_SHARED_GCHEAPSUMMARY_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "memory/metaspaceChunkFreeListSummary.hpp"
  30 
  31 class VirtualSpaceSummary : public StackObj {
  32   HeapWord* _start;
  33   HeapWord* _committed_end;
  34   HeapWord* _reserved_end;
  35 public:
  36   VirtualSpaceSummary() :
  37       _start(NULL), _committed_end(NULL), _reserved_end(NULL) { }
  38   VirtualSpaceSummary(HeapWord* start, HeapWord* committed_end, HeapWord* reserved_end) :
  39       _start(start), _committed_end(committed_end), _reserved_end(reserved_end) { }
  40 
  41   HeapWord* start() const { return _start; }
  42   HeapWord* committed_end() const { return _committed_end; }
  43   HeapWord* reserved_end() const { return _reserved_end; }
  44   size_t committed_size() const { return (uintptr_t)_committed_end - (uintptr_t)_start;  }
  45   size_t reserved_size() const { return (uintptr_t)_reserved_end - (uintptr_t)_start; }
  46 };
  47 
  48 class SpaceSummary : public StackObj {
  49   HeapWord* _start;
  50   HeapWord* _end;
  51   size_t    _used;
  52 public:
  53   SpaceSummary() :
  54       _start(NULL), _end(NULL), _used(0) { }
  55   SpaceSummary(HeapWord* start, HeapWord* end, size_t used) :
  56       _start(start), _end(end), _used(used) { }
  57 
  58   HeapWord* start() const { return _start; }
  59   HeapWord* end() const { return _end; }
  60   size_t used() const { return _used; }
  61   size_t size() const { return (uintptr_t)_end - (uintptr_t)_start; }
  62 };
  63 
  64 class MetaspaceSizes : public StackObj {
  65   size_t _committed;
  66   size_t _used;
  67   size_t _reserved;
  68 
  69  public:
  70   MetaspaceSizes() : _committed(0), _used(0), _reserved(0) {}
  71   MetaspaceSizes(size_t committed, size_t used, size_t reserved) :
  72     _committed(committed), _used(used), _reserved(reserved) {}
  73 
  74   size_t committed() const { return _committed; }
  75   size_t used() const { return _used; }
  76   size_t reserved() const { return _reserved; }
  77 };
  78 
  79 class GCHeapSummary;
  80 class PSHeapSummary;
  81 class G1HeapSummary;
  82 
  83 class GCHeapSummaryVisitor {
  84  public:
  85   virtual void visit(const GCHeapSummary* heap_summary) const = 0;
  86   virtual void visit(const PSHeapSummary* heap_summary) const {}
  87   virtual void visit(const G1HeapSummary* heap_summary) const {}
  88 };
  89 
  90 class GCHeapSummary : public StackObj {
  91   VirtualSpaceSummary _heap;
  92   size_t _used;
  93 
  94  public:
  95    GCHeapSummary() :
  96        _heap(), _used(0) { }
  97    GCHeapSummary(VirtualSpaceSummary& heap_space, size_t used) :
  98        _heap(heap_space), _used(used) { }
  99 
 100   const VirtualSpaceSummary& heap() const { return _heap; }
 101   size_t used() const { return _used; }
 102 
 103    virtual void accept(GCHeapSummaryVisitor* visitor) const {
 104      visitor->visit(this);
 105    }
 106 };
 107 
 108 class PSHeapSummary : public GCHeapSummary {
 109   VirtualSpaceSummary  _old;
 110   SpaceSummary         _old_space;
 111   VirtualSpaceSummary  _young;
 112   SpaceSummary         _eden;
 113   SpaceSummary         _from;
 114   SpaceSummary         _to;
 115  public:
 116    PSHeapSummary(VirtualSpaceSummary& heap_space, size_t heap_used, VirtualSpaceSummary old, SpaceSummary old_space, VirtualSpaceSummary young, SpaceSummary eden, SpaceSummary from, SpaceSummary to) :
 117        GCHeapSummary(heap_space, heap_used), _old(old), _old_space(old_space), _young(young), _eden(eden), _from(from), _to(to) { }
 118    const VirtualSpaceSummary& old() const { return _old; }
 119    const SpaceSummary& old_space() const { return _old_space; }
 120    const VirtualSpaceSummary& young() const { return _young; }
 121    const SpaceSummary& eden() const { return _eden; }
 122    const SpaceSummary& from() const { return _from; }
 123    const SpaceSummary& to() const { return _to; }
 124 
 125    virtual void accept(GCHeapSummaryVisitor* visitor) const {
 126      visitor->visit(this);
 127    }
 128 };
 129 
 130 class G1HeapSummary : public GCHeapSummary {
 131   size_t  _edenUsed;
 132   size_t  _edenCapacity;
 133   size_t  _survivorUsed;
 134  public:
 135    G1HeapSummary(VirtualSpaceSummary& heap_space, size_t heap_used, size_t edenUsed, size_t edenCapacity, size_t survivorUsed) :
 136        GCHeapSummary(heap_space, heap_used), _edenUsed(edenUsed), _edenCapacity(edenCapacity), _survivorUsed(survivorUsed) { }
 137    const size_t edenUsed() const { return _edenUsed; }
 138    const size_t edenCapacity() const { return _edenCapacity; }
 139    const size_t survivorUsed() const { return _survivorUsed; }
 140 
 141    virtual void accept(GCHeapSummaryVisitor* visitor) const {
 142      visitor->visit(this);
 143    }
 144 };
 145 
 146 class MetaspaceSummary : public StackObj {
 147   size_t _capacity_until_GC;
 148   MetaspaceSizes _meta_space;
 149   MetaspaceSizes _data_space;
 150   MetaspaceSizes _class_space;
 151   MetaspaceChunkFreeListSummary _metaspace_chunk_free_list_summary;
 152   MetaspaceChunkFreeListSummary _class_chunk_free_list_summary;
 153 
 154  public:
 155   MetaspaceSummary() :
 156     _capacity_until_GC(0),
 157     _meta_space(),
 158     _data_space(),
 159     _class_space(),
 160     _metaspace_chunk_free_list_summary(),
 161     _class_chunk_free_list_summary()
 162   {}
 163   MetaspaceSummary(size_t capacity_until_GC,
 164                    const MetaspaceSizes& meta_space,
 165                    const MetaspaceSizes& data_space,
 166                    const MetaspaceSizes& class_space,
 167                    const MetaspaceChunkFreeListSummary& metaspace_chunk_free_list_summary,
 168                    const MetaspaceChunkFreeListSummary& class_chunk_free_list_summary) :
 169     _capacity_until_GC(capacity_until_GC),
 170     _meta_space(meta_space),
 171     _data_space(data_space),
 172     _class_space(class_space),
 173     _metaspace_chunk_free_list_summary(metaspace_chunk_free_list_summary),
 174     _class_chunk_free_list_summary(class_chunk_free_list_summary)
 175   {}
 176 
 177   size_t capacity_until_GC() const { return _capacity_until_GC; }
 178   const MetaspaceSizes& meta_space() const { return _meta_space; }
 179   const MetaspaceSizes& data_space() const { return _data_space; }
 180   const MetaspaceSizes& class_space() const { return _class_space; }
 181 
 182   const MetaspaceChunkFreeListSummary& metaspace_chunk_free_list_summary() const {
 183     return _metaspace_chunk_free_list_summary;
 184   }
 185 
 186   const MetaspaceChunkFreeListSummary& class_chunk_free_list_summary() const {
 187     return _class_chunk_free_list_summary;
 188   }
 189 
 190 };
 191 
 192 class G1EvacSummary : public StackObj {
 193 private:
 194   size_t _allocated;          // Total allocated
 195   size_t _wasted;             // of which wasted (internal fragmentation)
 196   size_t _undo_wasted;        // of which wasted on undo (is not used for calculation of PLAB size)
 197   size_t _unused;             // Unused in last buffer
 198   size_t _used;
 199 
 200   size_t _region_end_waste; // Number of words wasted due to skipping to the next region.
 201   uint   _regions_filled;   // Number of regions filled completely.
 202   size_t _direct_allocated; // Number of words allocated directly into the regions.
 203 
 204   // Number of words in live objects remaining in regions that ultimately suffered an
 205   // evacuation failure. This is used in the regions when the regions are made old regions.
 206   size_t _failure_used;
 207   // Number of words wasted in regions which failed evacuation. This is the sum of space
 208   // for objects successfully copied out of the regions (now dead space) plus waste at the
 209   // end of regions.
 210   size_t _failure_waste;
 211 public:
 212   G1EvacSummary(size_t allocated, size_t wasted, size_t undo_wasted, size_t unused,
 213     size_t used, size_t region_end_waste, uint regions_filled, size_t direct_allocated,
 214     size_t failure_used, size_t failure_waste) :
 215     _allocated(allocated), _wasted(wasted), _undo_wasted(undo_wasted), _unused(unused),
 216     _used(used),  _region_end_waste(region_end_waste), _regions_filled(regions_filled),
 217     _direct_allocated(direct_allocated), _failure_used(failure_used), _failure_waste(failure_waste)
 218   { }
 219 
 220   size_t allocated() const { return _allocated; }
 221   size_t wasted() const { return _wasted; }
 222   size_t undo_wasted() const { return _undo_wasted; }
 223   size_t unused() const { return _unused; }
 224   size_t used() const { return _used; }
 225   size_t region_end_waste() const { return _region_end_waste; }
 226   uint regions_filled() const { return _regions_filled; }
 227   size_t direct_allocated() const { return _direct_allocated; }
 228   size_t failure_used() const { return _failure_used; }
 229   size_t failure_waste() const { return _failure_waste; }
 230 };
 231 
 232 #endif // SHARE_VM_GC_SHARED_GCHEAPSUMMARY_HPP