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 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