1 /*
   2  * Copyright (c) 2017, 2019, 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 #include "precompiled.hpp"
  25 #include "gc/shared/generationCounters.hpp"
  26 #include "gc/shared/hSpaceCounters.hpp"
  27 #include "gc/z/zCollectedHeap.hpp"
  28 #include "gc/z/zHeap.inline.hpp"
  29 #include "gc/z/zServiceability.hpp"
  30 #include "memory/metaspaceCounters.hpp"
  31 #include "runtime/perfData.hpp"
  32 
  33 class ZGenerationCounters : public GenerationCounters {
  34 public:
  35   ZGenerationCounters(const char* name, int ordinal, int spaces,
  36                       size_t min_capacity, size_t max_capacity, size_t curr_capacity) :
  37       GenerationCounters(name, ordinal, spaces,
  38                          min_capacity, max_capacity, curr_capacity) {}
  39 
  40   void update_capacity(size_t capacity) {
  41     _current_size->set_value(capacity);
  42   }
  43 };
  44 
  45 // Class to expose perf counters used by jstat.
  46 class ZServiceabilityCounters : public CHeapObj<mtGC> {
  47 private:
  48   ZGenerationCounters _generation_counters;
  49   HSpaceCounters      _space_counters;
  50   CollectorCounters   _collector_counters;
  51 
  52 public:
  53   ZServiceabilityCounters(size_t min_capacity, size_t max_capacity);
  54 
  55   CollectorCounters* collector_counters();
  56 
  57   void update_sizes();
  58 };
  59 
  60 ZServiceabilityCounters::ZServiceabilityCounters(size_t min_capacity, size_t max_capacity) :
  61     // generation.1
  62     _generation_counters("old"        /* name */,
  63                          1            /* ordinal */,
  64                          1            /* spaces */,
  65                          min_capacity /* min_capacity */,
  66                          max_capacity /* max_capacity */,
  67                          min_capacity /* curr_capacity */),
  68     // generation.1.space.0
  69     _space_counters(_generation_counters.name_space(),
  70                     "space"      /* name */,
  71                     0            /* ordinal */,
  72                     max_capacity /* max_capacity */,
  73                     min_capacity /* init_capacity */),
  74     // gc.collector.2
  75     _collector_counters("Z concurrent cycle pauses" /* name */,
  76                         2                /* ordinal */) {}
  77 
  78 CollectorCounters* ZServiceabilityCounters::collector_counters() {
  79   return &_collector_counters;
  80 }
  81 
  82 void ZServiceabilityCounters::update_sizes() {
  83   if (UsePerfData) {
  84     const size_t capacity = ZHeap::heap()->capacity();
  85     const size_t used = MIN2(ZHeap::heap()->used(), capacity);
  86 
  87     _generation_counters.update_capacity(capacity);
  88     _space_counters.update_capacity(capacity);
  89     _space_counters.update_used(used);
  90 
  91     MetaspaceCounters::update_performance_counters();
  92     CompressedClassSpaceCounters::update_performance_counters();
  93   }
  94 }
  95 
  96 ZServiceabilityMemoryPool::ZServiceabilityMemoryPool(size_t min_capacity, size_t max_capacity) :
  97     CollectedMemoryPool("ZHeap",
  98                         min_capacity,
  99                         max_capacity,
 100                         true /* support_usage_threshold */) {}
 101 
 102 size_t ZServiceabilityMemoryPool::used_in_bytes() {
 103   return ZHeap::heap()->used();
 104 }
 105 
 106 MemoryUsage ZServiceabilityMemoryPool::get_memory_usage() {
 107   const size_t committed = ZHeap::heap()->capacity();
 108   const size_t used      = MIN2(ZHeap::heap()->used(), committed);
 109 
 110   return MemoryUsage(initial_size(), used, committed, max_size());
 111 }
 112 
 113 ZServiceabilityMemoryManager::ZServiceabilityMemoryManager(ZServiceabilityMemoryPool* pool)
 114     : GCMemoryManager("ZGC", "end of major GC") {
 115   add_pool(pool);
 116 }
 117 
 118 ZServiceability::ZServiceability(size_t min_capacity, size_t max_capacity) :
 119     _min_capacity(min_capacity),
 120     _max_capacity(max_capacity),
 121     _memory_pool(_min_capacity, _max_capacity),
 122     _memory_manager(&_memory_pool),
 123     _counters(NULL) {}
 124 
 125 void ZServiceability::initialize() {
 126   _counters = new ZServiceabilityCounters(_min_capacity, _max_capacity);
 127 }
 128 
 129 MemoryPool* ZServiceability::memory_pool() {
 130   return &_memory_pool;
 131 }
 132 
 133 GCMemoryManager* ZServiceability::memory_manager() {
 134   return &_memory_manager;
 135 }
 136 
 137 ZServiceabilityCounters* ZServiceability::counters() {
 138   return _counters;
 139 }
 140 
 141 ZServiceabilityMemoryUsageTracker::~ZServiceabilityMemoryUsageTracker() {
 142   MemoryService::track_memory_usage();
 143 }
 144 
 145 ZServiceabilityManagerStatsTracer::ZServiceabilityManagerStatsTracer(bool is_gc_begin, bool is_gc_end) :
 146     _stats(ZHeap::heap()->serviceability_memory_manager(),
 147            ZCollectedHeap::heap()->gc_cause() /* cause */,
 148            true        /* allMemoryPoolsAffected */,
 149            is_gc_begin /* recordGCBeginTime */,
 150            is_gc_begin /* recordPreGCUsage */,
 151            true        /* recordPeakUsage */,
 152            is_gc_end   /* recordPostGCusage */,
 153            true        /* recordAccumulatedGCTime */,
 154            is_gc_end   /* recordGCEndTime */,
 155            is_gc_end   /* countCollection */) {}
 156 
 157 ZServiceabilityCountersTracer::ZServiceabilityCountersTracer() :
 158     _stats(ZHeap::heap()->serviceability_counters()->collector_counters()) {}
 159 
 160 ZServiceabilityCountersTracer::~ZServiceabilityCountersTracer() {
 161   ZHeap::heap()->serviceability_counters()->update_sizes();
 162 }
--- EOF ---