/*
* Copyright ( c ) 1997 , 2010 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*
*/
#include "precompiled.hpp"
#include "interpreter/bytecodeHistogram.hpp"
#include "memory/resourceArea.hpp"
#include "runtime/os.hpp"
#include "utilities/growableArray.hpp"
// ------------------------------------------------------------------------------------------------
// Non-product code
#ifndef PRODUCT
// Implementation of BytecodeCounter
int BytecodeCounter::_counter_value = 0 ;
jlong BytecodeCounter::_reset_time = 0 ;
void BytecodeCounter::reset() {
_counter_value = 0 ;
_reset_time = os::elapsed_counter();
}
double BytecodeCounter::elapsed_time() {
return (double )(os::elapsed_counter() - _reset_time) / (double )os::elapsed_frequency();
}
double BytecodeCounter::frequency() {
return (double )counter_value() / elapsed_time();
}
void BytecodeCounter::print() {
tty->print_cr(
"%d bytecodes executed in %.1fs (%.3fMHz)" ,
counter_value(),
elapsed_time(),
frequency() / 1000000 .0
);
}
// Helper class for sorting
class HistoEntry: public ResourceObj {
private :
int _index;
int _count;
public :
HistoEntry(int index, int count) { _index = index; _count = count; }
int index() const { return _index; }
int count() const { return _count; }
static int compare(HistoEntry** x, HistoEntry** y) { return (*x)->count() - (*y)->count(); }
};
// Helper functions
static GrowableArray<HistoEntry*>* sorted_array(int* array, int length) {
GrowableArray<HistoEntry*>* a = new GrowableArray<HistoEntry*>(length);
int i = length;
while (i-- > 0 ) a->append(new HistoEntry(i, array[i]));
a->sort(HistoEntry::compare);
return a;
}
static int total_count(GrowableArray<HistoEntry*>* profile) {
int sum = 0 ;
int i = profile->length();
while (i-- > 0 ) sum += profile->at(i)->count();
return sum;
}
static const char* name_for(int i) {
return Bytecodes::is_defined(i) ? Bytecodes::name(Bytecodes::cast(i)) : "xxxunusedxxx" ;
}
// Implementation of BytecodeHistogram
int BytecodeHistogram::_counters[Bytecodes::number_of_codes];
void BytecodeHistogram::reset() {
int i = Bytecodes::number_of_codes;
while (i-- > 0 ) _counters[i] = 0 ;
}
void BytecodeHistogram::print(float cutoff) {
ResourceMark rm;
GrowableArray<HistoEntry*>* profile = sorted_array(_counters, Bytecodes::number_of_codes);
// print profile
int tot = total_count(profile);
int abs_sum = 0 ;
tty->cr(); //0123456789012345678901234567890123456789012345678901234567890123456789
tty->print_cr("Histogram of %d executed bytecodes:" , tot);
tty->cr();
tty->print_cr(" absolute relative code name" );
tty->print_cr("----------------------------------------------------------------------" );
int i = profile->length();
while (i-- > 0 ) {
HistoEntry* e = profile->at(i);
int abs = e->count();
float rel = abs * 100 .0 F / tot;
if (cutoff <= rel) {
tty->print_cr("%10d %7.2f%% %02x %s" , abs, rel, e->index(), name_for(e->index()));
abs_sum += abs;
}
}
tty->print_cr("----------------------------------------------------------------------" );
float rel_sum = abs_sum * 100 .0 F / tot;
tty->print_cr("%10d %7.2f%% (cutoff = %.2f%%)" , abs_sum, rel_sum, cutoff);
tty->cr();
}
// Implementation of BytecodePairHistogram
int BytecodePairHistogram::_index;
int BytecodePairHistogram::_counters[BytecodePairHistogram::number_of_pairs];
void BytecodePairHistogram::reset() {
_index = Bytecodes::_nop << log2_number_of_codes;
int i = number_of_pairs;
while (i-- > 0 ) _counters[i] = 0 ;
}
void BytecodePairHistogram::print(float cutoff) {
ResourceMark rm;
GrowableArray<HistoEntry*>* profile = sorted_array(_counters, number_of_pairs);
// print profile
int tot = total_count(profile);
int abs_sum = 0 ;
tty->cr(); //0123456789012345678901234567890123456789012345678901234567890123456789
tty->print_cr("Histogram of %d executed bytecode pairs:" , tot);
tty->cr();
tty->print_cr(" absolute relative codes 1st bytecode 2nd bytecode" );
tty->print_cr("----------------------------------------------------------------------" );
int i = profile->length();
while (i-- > 0 ) {
HistoEntry* e = profile->at(i);
int abs = e->count();
float rel = abs * 100 .0 F / tot;
if (cutoff <= rel) {
int c1 = e->index() % number_of_codes;
int c2 = e->index() / number_of_codes;
tty->print_cr("%10d %6.3f%% %02x %02x %-19s %s" , abs, rel, c1, c2, name_for(c1), name_for(c2));
abs_sum += abs;
}
}
tty->print_cr("----------------------------------------------------------------------" );
float rel_sum = abs_sum * 100 .0 F / tot;
tty->print_cr("%10d %6.3f%% (cutoff = %.3f%%)" , abs_sum, rel_sum, cutoff);
tty->cr();
}
#endif
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