Mercurial > hg > truffle
view src/share/vm/runtime/prefetch.hpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
author | ysr |
---|---|
date | Mon, 02 Mar 2009 16:37:04 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 2003 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. * */ // If calls to prefetch methods are in a loop, the loop should be cloned // such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval // say not to do prefetching, these methods aren't called. At the very // least, they take up a memory issue slot. They should be implemented // as inline assembly code: doing an actual call isn't worth the cost. class Prefetch : AllStatic { public: enum style { do_none, // Do no prefetching do_read, // Do read prefetching do_write // Do write prefetching }; // Prefetch anticipating read; must not fault, semantically a no-op static void read(void* loc, intx interval); // Prefetch anticipating write; must not fault, semantically a no-op static void write(void* loc, intx interval); };