Mercurial > hg > graal-compiler
diff src/share/vm/memory/padded.inline.hpp @ 12029:9766f73e770d
8022880: False sharing between PSPromotionManager instances
Summary: Pad the PSPromotionManager instances in the manager array.
Reviewed-by: brutisso, jmasa
author | stefank |
---|---|
date | Fri, 31 May 2013 14:32:44 +0200 |
parents | |
children | d7070f371770 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/padded.inline.hpp Fri May 31 14:32:44 2013 +0200 @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2013, 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 "memory/allocation.inline.hpp" +#include "memory/padded.hpp" +#include "utilities/debug.hpp" +#include "utilities/globalDefinitions.hpp" + +// Creates an aligned padded array. +// The memory can't be deleted since the raw memory chunk is not returned. +template <class T, MEMFLAGS flags, size_t alignment> +PaddedEnd<T>* PaddedArray<T, flags, alignment>::create_unfreeable(uint length) { + // Check that the PaddedEnd class works as intended. + STATIC_ASSERT(is_size_aligned_(sizeof(PaddedEnd<T>), alignment)); + + // Allocate a chunk of memory large enough to allow for some alignment. + void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags); + + // Make the initial alignment. + PaddedEnd<T>* aligned_padded_array = (PaddedEnd<T>*)align_pointer_up(chunk, alignment); + + // Call the default constructor for each element. + for (uint i = 0; i < length; i++) { + ::new (&aligned_padded_array[i]) T(); + } + + return aligned_padded_array; +}