Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/accessFlags.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 |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_accessFlags.cpp.incl" | |
27 | |
28 | |
29 void AccessFlags::atomic_set_bits(jint bits) { | |
30 // Atomically update the flags with the bits given | |
31 jint old_flags, new_flags, f; | |
32 do { | |
33 old_flags = _flags; | |
34 new_flags = old_flags | bits; | |
35 f = Atomic::cmpxchg(new_flags, &_flags, old_flags); | |
36 } while(f != old_flags); | |
37 } | |
38 | |
39 void AccessFlags::atomic_clear_bits(jint bits) { | |
40 // Atomically update the flags with the bits given | |
41 jint old_flags, new_flags, f; | |
42 do { | |
43 old_flags = _flags; | |
44 new_flags = old_flags & ~bits; | |
45 f = Atomic::cmpxchg(new_flags, &_flags, old_flags); | |
46 } while(f != old_flags); | |
47 } | |
48 | |
49 #ifndef PRODUCT | |
50 | |
51 void AccessFlags::print_on(outputStream* st) const { | |
52 if (is_public ()) st->print("public " ); | |
53 if (is_private ()) st->print("private " ); | |
54 if (is_protected ()) st->print("protected " ); | |
55 if (is_static ()) st->print("static " ); | |
56 if (is_final ()) st->print("final " ); | |
57 if (is_synchronized()) st->print("synchronized "); | |
58 if (is_volatile ()) st->print("volatile " ); | |
59 if (is_transient ()) st->print("transient " ); | |
60 if (is_native ()) st->print("native " ); | |
61 if (is_interface ()) st->print("interface " ); | |
62 if (is_abstract ()) st->print("abstract " ); | |
63 if (is_strict ()) st->print("strict " ); | |
64 if (is_synthetic ()) st->print("synthetic " ); | |
65 if (is_old ()) st->print("{old} " ); | |
66 if (is_obsolete ()) st->print("{obsolete} " ); | |
67 } | |
68 | |
69 #endif | |
70 | |
71 void accessFlags_init() { | |
72 assert(sizeof(AccessFlags) == sizeof(jint), "just checking size of flags"); | |
73 } |