Mercurial > hg > truffle
annotate src/share/vm/asm/macroAssembler.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | 55fb97c4c58d |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 7199 | 1 /* |
|
17467
55fb97c4c58d
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
mikael
parents:
8047
diff
changeset
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| 7199 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_ASM_MACROASSEMBLER_HPP | |
| 26 #define SHARE_VM_ASM_MACROASSEMBLER_HPP | |
| 27 | |
| 28 #include "asm/assembler.hpp" | |
| 29 | |
| 30 #ifdef TARGET_ARCH_x86 | |
| 31 # include "macroAssembler_x86.hpp" | |
| 32 #endif | |
| 33 #ifdef TARGET_ARCH_sparc | |
|
7204
f0c2369fda5a
8003250: SPARC: move MacroAssembler into separate file
twisti
parents:
7199
diff
changeset
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34 # include "macroAssembler_sparc.hpp" |
| 7199 | 35 #endif |
| 36 #ifdef TARGET_ARCH_zero | |
| 37 # include "assembler_zero.hpp" | |
| 38 #endif | |
| 39 #ifdef TARGET_ARCH_arm | |
|
8046
a9c29dfc7d73
8003251: ARM: move MacroAssembler into separate file
morris
parents:
7204
diff
changeset
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40 # include "macroAssembler_arm.hpp" |
| 7199 | 41 #endif |
| 42 #ifdef TARGET_ARCH_ppc | |
|
8047
1e5e28bac299
8003252: PPC: move MacroAssembler into separate file
morris
parents:
8046
diff
changeset
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43 # include "macroAssembler_ppc.hpp" |
| 7199 | 44 #endif |
| 45 | |
| 46 #endif // SHARE_VM_ASM_MACROASSEMBLER_HPP |