Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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 * 100.0F / 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 * 100.0F / 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 * 100.0F / 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 * 100.0F / tot;

   tty->print_cr("%10d   %6.3f%%    (cutoff = %.3f%%)", abs_sum, rel_sum, cutoff);

   tty->cr();

 }

 #endif