bytecodeHistogram.cpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1997, 2000, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * 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
34int   BytecodeCounter::_counter_value = 0;
35jlong BytecodeCounter::_reset_time    = 0;
36
37
38void BytecodeCounter::reset() {
39  _counter_value = 0;
40  _reset_time    = os::elapsed_counter();
41}
42
43
44double BytecodeCounter::elapsed_time() {
45  return (double)(os::elapsed_counter() - _reset_time) / (double)os::elapsed_frequency();
46}
47
48
49double BytecodeCounter::frequency() {
50  return (double)counter_value() / elapsed_time();
51}
52
53
54void 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
66class 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
82static 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
91static 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
99static 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
106int BytecodeHistogram::_counters[Bytecodes::number_of_codes];
107
108
109void BytecodeHistogram::reset() {
110  int i = Bytecodes::number_of_codes;
111  while (i-- > 0) _counters[i] = 0;
112}
113
114
115void 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
145int BytecodePairHistogram::_index;
146int BytecodePairHistogram::_counters[BytecodePairHistogram::number_of_pairs];
147
148
149void 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
157void 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
187