Mercurial > hg > truffle
view src/share/vm/gc_implementation/shared/generationCounters.cpp @ 2134:b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
Summary: First attempt to allocate out the current alloc region using a CAS instead of taking the Heap_lock (first level of G1's slow allocation path). Only if that fails and it's necessary to replace the current alloc region take the Heap_lock (that's the second level of G1's slow allocation path).
Reviewed-by: johnc, brutisso, ysr
author | tonyp |
---|---|
date | Wed, 12 Jan 2011 16:34:25 -0500 |
parents | f95d63e2154a |
children | b52782ae3880 |
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/* * Copyright (c) 2002, 2010, 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 "gc_implementation/shared/generationCounters.hpp" #include "memory/resourceArea.hpp" GenerationCounters::GenerationCounters(const char* name, int ordinal, int spaces, VirtualSpace* v): _virtual_space(v) { if (UsePerfData) { EXCEPTION_MARK; ResourceMark rm; const char* cns = PerfDataManager::name_space("generation", ordinal); _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1); strcpy(_name_space, cns); const char* cname = PerfDataManager::counter_name(_name_space, "name"); PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK); 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, _virtual_space->committed_size(), CHECK); cname = PerfDataManager::counter_name(_name_space, "maxCapacity"); PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes, _virtual_space->reserved_size(), CHECK); cname = PerfDataManager::counter_name(_name_space, "capacity"); _current_size = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, _virtual_space->committed_size(), CHECK); } }