jdk8-mips64-public/hotspot: src/share/vm/memory/metaspaceCounters.cpp@2958af1d8c5a

     1 /*

     2  * Copyright (c) 2012, 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.

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    23  */

    25 #include "precompiled.hpp"

    26 #include "memory/metaspaceCounters.hpp"

    27 #include "memory/resourceArea.hpp"

    28 #include "utilities/exceptions.hpp"

    30 MetaspaceCounters* MetaspaceCounters::_metaspace_counters = NULL;

    32 size_t MetaspaceCounters::calc_total_capacity() {

    33   // The total capacity is the sum of

    34   //   1) capacity of Metachunks in use by all Metaspaces

    35   //   2) unused space at the end of each Metachunk

    36   //   3) space in the freelist

    37   size_t total_capacity = MetaspaceAux::allocated_capacity_bytes()

    38     + MetaspaceAux::free_bytes() + MetaspaceAux::free_chunks_total_in_bytes();

    39   return total_capacity;

    40 }

    42 MetaspaceCounters::MetaspaceCounters() :

    43     _capacity(NULL),

    44     _used(NULL),

    45     _max_capacity(NULL) {

    46   if (UsePerfData) {

    47     size_t min_capacity = MetaspaceAux::min_chunk_size();

    48     size_t max_capacity = MetaspaceAux::reserved_in_bytes();

    49     size_t curr_capacity = calc_total_capacity();

    50     size_t used = MetaspaceAux::allocated_used_bytes();

    52     initialize(min_capacity, max_capacity, curr_capacity, used);

    53   }

    54 }

    56 static PerfVariable* create_ms_variable(const char *ns,

    57                                         const char *name,

    58                                         size_t value,

    59                                         TRAPS) {

    60   const char *path = PerfDataManager::counter_name(ns, name);

    61   PerfVariable *result =

    62       PerfDataManager::create_variable(SUN_GC, path, PerfData::U_Bytes, value,

    63                                        CHECK_NULL);

    64   return result;

    65 }

    67 static void create_ms_constant(const char *ns,

    68                                const char *name,

    69                                size_t value,

    70                                TRAPS) {

    71   const char *path = PerfDataManager::counter_name(ns, name);

    72   PerfDataManager::create_constant(SUN_GC, path, PerfData::U_Bytes, value, CHECK);

    73 }

    75 void MetaspaceCounters::initialize(size_t min_capacity,

    76                                    size_t max_capacity,

    77                                    size_t curr_capacity,

    78                                    size_t used) {

    80   if (UsePerfData) {

    81     EXCEPTION_MARK;

    82     ResourceMark rm;

    84     const char *ms = "metaspace";

    86     create_ms_constant(ms, "minCapacity", min_capacity, CHECK);

    87     _max_capacity = create_ms_variable(ms, "maxCapacity", max_capacity, CHECK);

    88     _capacity = create_ms_variable(ms, "capacity", curr_capacity, CHECK);

    89     _used = create_ms_variable(ms, "used", used, CHECK);

    90   }

    91 }

    93 void MetaspaceCounters::update_capacity() {

    94   assert(UsePerfData, "Should not be called unless being used");

    95   size_t total_capacity = calc_total_capacity();

    96   _capacity->set_value(total_capacity);

    97 }

    99 void MetaspaceCounters::update_used() {

   100   assert(UsePerfData, "Should not be called unless being used");

   101   size_t used_in_bytes = MetaspaceAux::allocated_used_bytes();

   102   _used->set_value(used_in_bytes);

   103 }

   105 void MetaspaceCounters::update_max_capacity() {

   106   assert(UsePerfData, "Should not be called unless being used");

   107   assert(_max_capacity != NULL, "Should be initialized");

   108   size_t reserved_in_bytes = MetaspaceAux::reserved_in_bytes();

   109   _max_capacity->set_value(reserved_in_bytes);

   110 }

   112 void MetaspaceCounters::update_all() {

   113   if (UsePerfData) {

   114     update_used();

   115     update_capacity();

   116     update_max_capacity();

   117   }

   118 }

   120 void MetaspaceCounters::initialize_performance_counters() {

   121   if (UsePerfData) {

   122     assert(_metaspace_counters == NULL, "Should only be initialized once");

   123     _metaspace_counters = new MetaspaceCounters();

   124   }

   125 }

   127 void MetaspaceCounters::update_performance_counters() {

   128   if (UsePerfData) {

   129     assert(_metaspace_counters != NULL, "Should be initialized");

   130     _metaspace_counters->update_all();

   131   }

   132 }

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