1 /*
   2  * Copyright (c) 2002, 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 #include "precompiled.hpp"
  26 #include "gc_implementation/shared/cSpaceCounters.hpp"
  27 #include "memory/metaspace.hpp"
  28 #include "memory/resourceArea.hpp"
  29 
  30 CSpaceCounters::CSpaceCounters(const char* name, int ordinal, size_t max_size,
  31                                ContiguousSpace* s, GenerationCounters* gc) :
  32    _space(s) {
  33 
  34   if (UsePerfData) {
  35     EXCEPTION_MARK;
  36     ResourceMark rm;
  37 
  38     const char* cns = PerfDataManager::name_space(gc->name_space(), "space",
  39                                                   ordinal);
  40 
  41     _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtGC);
  42     strcpy(_name_space, cns);
  43 
  44     const char* cname = PerfDataManager::counter_name(_name_space, "name");
  45     PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);
  46 
  47     cname = PerfDataManager::counter_name(_name_space, "maxCapacity");
  48     _max_capacity = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
  49                                      (jlong)max_size, CHECK);
  50 
  51     cname = PerfDataManager::counter_name(_name_space, "capacity");
  52     _capacity = PerfDataManager::create_variable(SUN_GC, cname,
  53                                                  PerfData::U_Bytes,
  54                                                  _space->capacity(), CHECK);
  55 
  56     cname = PerfDataManager::counter_name(_name_space, "used");
  57     _used = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
  58                                     new ContiguousSpaceUsedHelper(_space),
  59                                     CHECK);
  60 
  61     cname = PerfDataManager::counter_name(_name_space, "initCapacity");
  62     PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
  63                                      _space->capacity(), CHECK);
  64   }
  65 }
  66 
  67 void CSpaceCounters::update_capacity() {
  68   _capacity->set_value(_space->capacity());
  69 }
  70 
  71 void CSpaceCounters::update_used() {
  72   _used->set_value(_space->used());
  73 }
  74 
  75 void CSpaceCounters::update_all() {
  76   update_used();
  77   update_capacity();
  78 }
  79 
  80 jlong ContiguousSpaceUsedHelper::take_sample(){
  81   return _space->used();
  82 }