Mercurial > hg > graal-compiler
annotate src/share/vm/interpreter/bytecodeHistogram.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, 2000, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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/_bytecodeHistogram.cpp.incl" | |
27 | |
28 // ------------------------------------------------------------------------------------------------ | |
29 // Non-product code | |
30 #ifndef PRODUCT | |
31 | |
32 // Implementation of BytecodeCounter | |
33 | |
34 int BytecodeCounter::_counter_value = 0; | |
35 jlong BytecodeCounter::_reset_time = 0; | |
36 | |
37 | |
38 void BytecodeCounter::reset() { | |
39 _counter_value = 0; | |
40 _reset_time = os::elapsed_counter(); | |
41 } | |
42 | |
43 | |
44 double BytecodeCounter::elapsed_time() { | |
45 return (double)(os::elapsed_counter() - _reset_time) / (double)os::elapsed_frequency(); | |
46 } | |
47 | |
48 | |
49 double BytecodeCounter::frequency() { | |
50 return (double)counter_value() / elapsed_time(); | |
51 } | |
52 | |
53 | |
54 void BytecodeCounter::print() { | |
55 tty->print_cr( | |
56 "%d bytecodes executed in %.1fs (%.3fMHz)", | |
57 counter_value(), | |
58 elapsed_time(), | |
59 frequency() / 1000000.0 | |
60 ); | |
61 } | |
62 | |
63 | |
64 // Helper class for sorting | |
65 | |
66 class HistoEntry: public ResourceObj { | |
67 private: | |
68 int _index; | |
69 int _count; | |
70 | |
71 public: | |
72 HistoEntry(int index, int count) { _index = index; _count = count; } | |
73 int index() const { return _index; } | |
74 int count() const { return _count; } | |
75 | |
76 static int compare(HistoEntry** x, HistoEntry** y) { return (*x)->count() - (*y)->count(); } | |
77 }; | |
78 | |
79 | |
80 // Helper functions | |
81 | |
82 static GrowableArray<HistoEntry*>* sorted_array(int* array, int length) { | |
83 GrowableArray<HistoEntry*>* a = new GrowableArray<HistoEntry*>(length); | |
84 int i = length; | |
85 while (i-- > 0) a->append(new HistoEntry(i, array[i])); | |
86 a->sort(HistoEntry::compare); | |
87 return a; | |
88 } | |
89 | |
90 | |
91 static int total_count(GrowableArray<HistoEntry*>* profile) { | |
92 int sum = 0; | |
93 int i = profile->length(); | |
94 while (i-- > 0) sum += profile->at(i)->count(); | |
95 return sum; | |
96 } | |
97 | |
98 | |
99 static const char* name_for(int i) { | |
100 return Bytecodes::is_defined(i) ? Bytecodes::name(Bytecodes::cast(i)) : "xxxunusedxxx"; | |
101 } | |
102 | |
103 | |
104 // Implementation of BytecodeHistogram | |
105 | |
106 int BytecodeHistogram::_counters[Bytecodes::number_of_codes]; | |
107 | |
108 | |
109 void BytecodeHistogram::reset() { | |
110 int i = Bytecodes::number_of_codes; | |
111 while (i-- > 0) _counters[i] = 0; | |
112 } | |
113 | |
114 | |
115 void BytecodeHistogram::print(float cutoff) { | |
116 ResourceMark rm; | |
117 GrowableArray<HistoEntry*>* profile = sorted_array(_counters, Bytecodes::number_of_codes); | |
118 // print profile | |
119 int tot = total_count(profile); | |
120 int abs_sum = 0; | |
121 tty->cr(); //0123456789012345678901234567890123456789012345678901234567890123456789 | |
122 tty->print_cr("Histogram of %d executed bytecodes:", tot); | |
123 tty->cr(); | |
124 tty->print_cr(" absolute relative code name"); | |
125 tty->print_cr("----------------------------------------------------------------------"); | |
126 int i = profile->length(); | |
127 while (i-- > 0) { | |
128 HistoEntry* e = profile->at(i); | |
129 int abs = e->count(); | |
130 float rel = abs * 100.0F / tot; | |
131 if (cutoff <= rel) { | |
132 tty->print_cr("%10d %7.2f%% %02x %s", abs, rel, e->index(), name_for(e->index())); | |
133 abs_sum += abs; | |
134 } | |
135 } | |
136 tty->print_cr("----------------------------------------------------------------------"); | |
137 float rel_sum = abs_sum * 100.0F / tot; | |
138 tty->print_cr("%10d %7.2f%% (cutoff = %.2f%%)", abs_sum, rel_sum, cutoff); | |
139 tty->cr(); | |
140 } | |
141 | |
142 | |
143 // Implementation of BytecodePairHistogram | |
144 | |
145 int BytecodePairHistogram::_index; | |
146 int BytecodePairHistogram::_counters[BytecodePairHistogram::number_of_pairs]; | |
147 | |
148 | |
149 void BytecodePairHistogram::reset() { | |
150 _index = Bytecodes::_nop << log2_number_of_codes; | |
151 | |
152 int i = number_of_pairs; | |
153 while (i-- > 0) _counters[i] = 0; | |
154 } | |
155 | |
156 | |
157 void BytecodePairHistogram::print(float cutoff) { | |
158 ResourceMark rm; | |
159 GrowableArray<HistoEntry*>* profile = sorted_array(_counters, number_of_pairs); | |
160 // print profile | |
161 int tot = total_count(profile); | |
162 int abs_sum = 0; | |
163 tty->cr(); //0123456789012345678901234567890123456789012345678901234567890123456789 | |
164 tty->print_cr("Histogram of %d executed bytecode pairs:", tot); | |
165 tty->cr(); | |
166 tty->print_cr(" absolute relative codes 1st bytecode 2nd bytecode"); | |
167 tty->print_cr("----------------------------------------------------------------------"); | |
168 int i = profile->length(); | |
169 while (i-- > 0) { | |
170 HistoEntry* e = profile->at(i); | |
171 int abs = e->count(); | |
172 float rel = abs * 100.0F / tot; | |
173 if (cutoff <= rel) { | |
174 int c1 = e->index() % number_of_codes; | |
175 int c2 = e->index() / number_of_codes; | |
176 tty->print_cr("%10d %6.3f%% %02x %02x %-19s %s", abs, rel, c1, c2, name_for(c1), name_for(c2)); | |
177 abs_sum += abs; | |
178 } | |
179 } | |
180 tty->print_cr("----------------------------------------------------------------------"); | |
181 float rel_sum = abs_sum * 100.0F / tot; | |
182 tty->print_cr("%10d %6.3f%% (cutoff = %.3f%%)", abs_sum, rel_sum, cutoff); | |
183 tty->cr(); | |
184 } | |
185 | |
186 #endif |