Mercurial > hg > graal-compiler
view src/share/vm/utilities/growableArray.cpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 1997, 2005, 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 "incls/_precompiled.incl" # include "incls/_growableArray.cpp.incl" #ifdef ASSERT void GenericGrowableArray::set_nesting() { if (on_stack()) { _nesting = Thread::current()->resource_area()->nesting(); } } void GenericGrowableArray::check_nesting() { // Check for insidious allocation bug: if a GrowableArray overflows, the // grown array must be allocated under the same ResourceMark as the original. // Otherwise, the _data array will be deallocated too early. if (on_stack() && _nesting != Thread::current()->resource_area()->nesting()) { fatal("allocation bug: GrowableArray could grow within nested ResourceMark"); } } #endif void* GenericGrowableArray::raw_allocate(int elementSize) { assert(_max >= 0, "integer overflow"); size_t byte_size = elementSize * (size_t) _max; if (on_stack()) { return (void*)resource_allocate_bytes(byte_size); } else if (on_C_heap()) { return (void*)AllocateHeap(byte_size, "GrET in " __FILE__); } else { return _arena->Amalloc(byte_size); } }