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6964458: Reimplement class meta-data storage to use native memory

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Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes

Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com>
Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Co-authored-by: Tom Rodriguez <tom.rodriguez@oracle.com>
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
This commit is contained in:
Jon Masamitsu 2012-09-01 13:25:18 -04:00 • committed by Coleen Phillimore
parent 36eee7c8c8
commit 5c58d27aac
853 changed files with 26124 additions and 82956 deletions
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164
hotspot/src/share/vm/memory/metaspaceCounters.cpp Normal file
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/*
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "memory/metaspaceCounters.hpp"
#include "memory/resourceArea.hpp"
#define METASPACE_NAME "perm"
MetaspaceCounters* MetaspaceCounters::_metaspace_counters = NULL;
MetaspaceCounters::MetaspaceCounters() {
if (UsePerfData) {
size_t min_capacity = MetaspaceAux::min_chunk_size();
size_t max_capacity = MetaspaceAux::reserved_in_bytes();
size_t curr_capacity = MetaspaceAux::capacity_in_bytes();
size_t used = MetaspaceAux::used_in_bytes();
initialize(min_capacity, max_capacity, curr_capacity, used);
}
}
void MetaspaceCounters::initialize(size_t min_capacity,
size_t max_capacity,
size_t curr_capacity,
size_t used) {
if (UsePerfData) {
EXCEPTION_MARK;
ResourceMark rm;
// Create a name that will be recognized by jstat tools as
// the perm gen. Change this to a Metaspace name when the
// tools are fixed.
// name to recognize "sun.gc.generation.2.*"
const char* name = METASPACE_NAME;
const int ordinal = 2;
const int spaces = 1;
const char* cns = PerfDataManager::name_space("generation", ordinal);
_name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtClass);
strcpy(_name_space, cns);
const char* cname = PerfDataManager::counter_name(_name_space, "name");
PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);
// End of perm gen like name creation
cname = PerfDataManager::counter_name(_name_space, "spaces");
PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None,
spaces, CHECK);
cname = PerfDataManager::counter_name(_name_space, "minCapacity");
PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
min_capacity, CHECK);
cname = PerfDataManager::counter_name(_name_space, "maxCapacity");
PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
max_capacity, CHECK);
cname = PerfDataManager::counter_name(_name_space, "capacity");
_current_size =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
curr_capacity, CHECK);
// SpaceCounter like counters
// name to recognize "sun.gc.generation.2.space.0.*"
{
const int space_ordinal = 0;
const char* cns = PerfDataManager::name_space(_name_space, "space",
space_ordinal);
char* space_name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtClass);
strcpy(space_name_space, cns);
const char* cname = PerfDataManager::counter_name(space_name_space, "name");
PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);
cname = PerfDataManager::counter_name(space_name_space, "maxCapacity");
_max_capacity = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes,
(jlong)max_capacity, CHECK);
cname = PerfDataManager::counter_name(space_name_space, "capacity");
_capacity = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes,
curr_capacity, CHECK);
cname = PerfDataManager::counter_name(space_name_space, "used");
_used = PerfDataManager::create_variable(SUN_GC,
cname,
PerfData::U_Bytes,
used,
CHECK);
cname = PerfDataManager::counter_name(space_name_space, "initCapacity");
PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
min_capacity, CHECK);
}
}
}
void MetaspaceCounters::update_capacity() {
assert(UsePerfData, "Should not be called unless being used");
size_t capacity_in_bytes = MetaspaceAux::capacity_in_bytes();
_capacity->set_value(capacity_in_bytes);
}
void MetaspaceCounters::update_used() {
assert(UsePerfData, "Should not be called unless being used");
size_t used_in_bytes = MetaspaceAux::used_in_bytes();
_used->set_value(used_in_bytes);
}
void MetaspaceCounters::update_max_capacity() {
assert(UsePerfData, "Should not be called unless being used");
size_t reserved_in_bytes = MetaspaceAux::reserved_in_bytes();
_max_capacity->set_value(reserved_in_bytes);
}
void MetaspaceCounters::update_all() {
if (UsePerfData) {
update_used();
update_capacity();
update_max_capacity();
_current_size->set_value(MetaspaceAux::reserved_in_bytes());
}
}
void MetaspaceCounters::initialize_performance_counters() {
if (UsePerfData) {
_metaspace_counters = new MetaspaceCounters();
}
}
void MetaspaceCounters::update_performance_counters() {
if (UsePerfData) {
_metaspace_counters->update_all();
}
}