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comparison src/share/vm/interpreter/bytecodeHistogram.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
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