Mercurial > hg > graal-compiler
annotate src/share/vm/oops/objArrayKlassKlass.hpp @ 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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12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
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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. | |
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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 // The objArrayKlassKlass is klass for all objArrayKlass' | |
26 | |
27 class objArrayKlassKlass : public arrayKlassKlass { | |
28 public: | |
29 // Testing | |
30 virtual bool oop_is_objArrayKlass() const { return true; } | |
31 | |
32 // Dispatched operation | |
33 int oop_size(oop obj) const { return objArrayKlass::cast(klassOop(obj))->object_size(); } | |
34 int klass_oop_size() const { return object_size(); } | |
35 | |
36 // Allocation | |
37 DEFINE_ALLOCATE_PERMANENT(objArrayKlassKlass); | |
38 static klassOop create_klass(TRAPS); | |
39 klassOop allocate_objArray_klass(int n, KlassHandle element_klass, TRAPS); | |
40 klassOop allocate_system_objArray_klass(TRAPS); // Used for bootstrapping in Universe::genesis | |
41 | |
42 // Casting from klassOop | |
43 static objArrayKlassKlass* cast(klassOop k) { | |
44 assert(k->klass_part()->oop_is_klass(), "cast to objArrayKlassKlass"); | |
45 return (objArrayKlassKlass*) k->klass_part(); | |
46 } | |
47 | |
48 // Sizing | |
49 static int header_size() { return oopDesc::header_size() + sizeof(objArrayKlassKlass)/HeapWordSize; } | |
50 int object_size() const { return align_object_size(header_size()); } | |
51 | |
52 // Garbage collection | |
53 void oop_follow_contents(oop obj); | |
54 int oop_adjust_pointers(oop obj); | |
55 | |
56 // Parallel Scavenge and Parallel Old | |
57 PARALLEL_GC_DECLS | |
58 | |
59 // Iterators | |
60 int oop_oop_iterate(oop obj, OopClosure* blk); | |
61 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); | |
62 | |
63 private: | |
64 // helpers | |
65 static klassOop allocate_objArray_klass_impl(objArrayKlassKlassHandle this_oop, int n, KlassHandle element_klass, TRAPS); | |
66 | |
67 public: | |
68 // Printing | |
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69 void oop_print_value_on(oop obj, outputStream* st); |
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70 #ifndef PRODUCT |
0 | 71 void oop_print_on(oop obj, outputStream* st); |
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72 #endif //PRODUCT |
0 | 73 |
74 // Verification | |
75 const char* internal_name() const; | |
76 void oop_verify_on(oop obj, outputStream* st); | |
77 | |
78 }; |