Mercurial > hg > truffle
view src/share/vm/gc_implementation/shared/generationCounters.cpp @ 1166:7b0e9cba0307
6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc
author | ysr |
---|---|
date | Wed, 13 Jan 2010 15:26:39 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2002-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ # include "incls/_precompiled.incl" # include "incls/_generationCounters.cpp.incl" 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); } }