Mercurial > hg > graal-compiler
annotate src/share/vm/memory/classify.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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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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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/_classify.cpp.incl" | |
27 | |
28 | |
29 const char* ClassifyObjectClosure::object_type_name[number_object_types] = { | |
30 "unknown", | |
31 "instance", | |
32 "instanceRef", | |
33 "objArray", | |
34 "symbol", | |
35 "klass", | |
36 "instanceKlass", | |
37 "method", | |
38 "constMethod", | |
39 "methodData", | |
40 "constantPool", | |
41 "constantPoolCache", | |
42 "typeArray", | |
43 "compiledICHolder" | |
44 }; | |
45 | |
46 | |
47 object_type ClassifyObjectClosure::classify_object(oop obj, bool count) { | |
48 object_type type = unknown_type; | |
49 | |
50 Klass* k = obj->blueprint(); | |
51 | |
1142 | 52 if (k->as_klassOop() == SystemDictionary::Object_klass()) { |
0 | 53 tty->print_cr("Found the class!"); |
54 } | |
55 | |
56 if (count) { | |
57 k->set_alloc_count(k->alloc_count() + 1); | |
58 } | |
59 | |
60 if (obj->is_instance()) { | |
61 if (k->oop_is_instanceRef()) { | |
62 type = instanceRef_type; | |
63 } else { | |
64 type = instance_type; | |
65 } | |
66 } else if (obj->is_typeArray()) { | |
67 type = typeArray_type; | |
68 } else if (obj->is_objArray()) { | |
69 type = objArray_type; | |
70 } else if (obj->is_symbol()) { | |
71 type = symbol_type; | |
72 } else if (obj->is_klass()) { | |
73 Klass* k = ((klassOop)obj)->klass_part(); | |
74 if (k->oop_is_instance()) { | |
75 type = instanceKlass_type; | |
76 } else { | |
77 type = klass_type; | |
78 } | |
79 } else if (obj->is_method()) { | |
80 type = method_type; | |
81 } else if (obj->is_constMethod()) { | |
82 type = constMethod_type; | |
83 } else if (obj->is_methodData()) { | |
84 ShouldNotReachHere(); | |
85 } else if (obj->is_constantPool()) { | |
86 type = constantPool_type; | |
87 } else if (obj->is_constantPoolCache()) { | |
88 type = constantPoolCache_type; | |
89 } else if (obj->is_compiledICHolder()) { | |
90 type = compiledICHolder_type; | |
91 } else { | |
92 ShouldNotReachHere(); | |
93 } | |
94 | |
95 assert(type != unknown_type, "found object of unknown type."); | |
96 return type; | |
97 } | |
98 | |
99 | |
100 void ClassifyObjectClosure::reset() { | |
101 for (int i = 0; i < number_object_types; ++i) { | |
102 object_count[i] = 0; | |
103 object_size[i] = 0; | |
104 } | |
105 total_object_count = 0; | |
106 total_object_size = 0; | |
107 } | |
108 | |
109 | |
110 void ClassifyObjectClosure::do_object(oop obj) { | |
111 int i = classify_object(obj, true); | |
112 ++object_count[i]; | |
113 ++total_object_count; | |
114 size_t size = obj->size() * HeapWordSize; | |
115 object_size[i] += size; | |
116 total_object_size += size; | |
117 } | |
118 | |
119 | |
120 size_t ClassifyObjectClosure::print() { | |
121 int num_objects = 0; | |
122 size_t size_objects = 0; | |
123 for (int i = 0; i < number_object_types; ++i) { | |
124 if (object_count[i] != 0) { | |
125 tty->print_cr("%8d %-22s (%8d bytes, %5.2f bytes/object)", | |
126 object_count[i], object_type_name[i], object_size[i], | |
127 (float)object_size[i]/(float)object_count[i]); | |
128 } | |
129 num_objects += object_count[i]; | |
130 size_objects += object_size[i]; | |
131 } | |
132 assert(num_objects == total_object_count, "Object count mismatch!"); | |
133 assert(size_objects == total_object_size, "Object size mismatch!"); | |
134 | |
135 tty->print_cr(" Total: %d objects, %d bytes", total_object_count, | |
136 total_object_size); | |
137 return total_object_size; | |
138 } | |
139 | |
140 | |
141 void ClassifyInstanceKlassClosure::do_object(oop obj) { | |
142 int type = classify_object(obj, false); | |
143 if (type == instanceKlass_type || type == klass_type) { | |
144 Klass* k = ((klassOop)obj)->klass_part(); | |
145 if (k->alloc_count() > 0) { | |
146 ResourceMark rm; | |
147 const char *name; | |
148 if (k->name() == NULL) { | |
149 | |
150 if (obj == Universe::klassKlassObj()) { | |
151 name = "_klassKlassObj"; | |
152 } else if (obj == Universe::arrayKlassKlassObj()) { | |
153 name = "_arrayKlassKlassObj"; | |
154 } else if (obj == Universe::objArrayKlassKlassObj()) { | |
155 name = "_objArrayKlassKlassObj"; | |
156 } else if (obj == Universe::typeArrayKlassKlassObj()) { | |
157 name = "_typeArrayKlassKlassObj"; | |
158 } else if (obj == Universe::instanceKlassKlassObj()) { | |
159 name = "_instanceKlassKlassObj"; | |
160 } else if (obj == Universe::symbolKlassObj()) { | |
161 name = "_symbolKlassObj"; | |
162 } else if (obj == Universe::methodKlassObj()) { | |
163 name = "_methodKlassObj"; | |
164 } else if (obj == Universe::constMethodKlassObj()) { | |
165 name = "_constMethodKlassObj"; | |
166 } else if (obj == Universe::constantPoolKlassObj()) { | |
167 name = "_constantPoolKlassObj"; | |
168 } else if (obj == Universe::constantPoolCacheKlassObj()) { | |
169 name = "_constantPoolCacheKlassObj"; | |
170 } else if (obj == Universe::compiledICHolderKlassObj()) { | |
171 name = "_compiledICHolderKlassObj"; | |
172 } else if (obj == Universe::systemObjArrayKlassObj()) { | |
173 name = "_systemObjArrayKlassObj"; | |
174 } else { | |
175 name = "[unnamed]"; | |
176 } | |
177 } else { | |
178 name = k->external_name(); | |
179 } | |
180 tty->print_cr("% 8d instances of %s", k->alloc_count(), name); | |
181 } | |
182 total_instances += k->alloc_count(); | |
183 } | |
184 } | |
185 | |
186 | |
187 void ClassifyInstanceKlassClosure::print() { | |
188 tty->print_cr(" Total instances: %d.", total_instances); | |
189 } | |
190 | |
191 | |
192 void ClassifyInstanceKlassClosure::reset() { | |
193 total_instances = 0; | |
194 } |