gacl/profiler.inc.php

   1 <?php
   2 /********************************************************************************\
   3  * Copyright (C) Carl Taylor (cjtaylor@adepteo.com)                             *
   4  * Copyright (C) Torben Nehmer (torben@nehmer.net) for Code Cleanup             *
   5  *                                                                              *
   6  * This program is free software; you can redistribute it and/or                *
   7  * modify it under the terms of the GNU General Public License                  *
   8  * as published by the Free Software Foundation; either version 2               *
   9  * of the License, or (at your option) any later version.                       *
  10  *                                                                              *
  11  * This program is distributed in the hope that it will be useful,              *
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                *
  14  * GNU General Public License for more details.                                 *
  15  *                                                                              *
  16  * You should have received a copy of the GNU General Public License            *
  17  * along with this program; if not, write to the Free Software                  *
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.  *
  19 \********************************************************************************/
  20
  21 /// Enable multiple timers to aid profiling of performance over sections of code
  22 class Profiler {
  23     var $description;
  24     var $startTime;
  25     var $endTime;
  26     var $initTime;
  27     var $cur_timer;
  28     var $stack;
  29     var $trail;
  30     var $trace;
  31     var $count;
  32     var $running;
  33
  34     /**
  35     * Initialise the timer. with the current micro time
  36     */
  37     function __construct( $output_enabled=false, $trace_enabled=false)
  38     {
  39         $this->description = array();
  40         $this->startTime = array();
  41         $this->endTime = array();
  42         $this->initTime = 0;
  43         $this->cur_timer = "";
  44         $this->stack = array();
  45         $this->trail = "";
  46         $this->trace = "";
  47         $this->count = array();
  48         $this->running = array();
  49         $this->initTime = $this->getMicroTime();
  50         $this->output_enabled = $output_enabled;
  51         $this->trace_enabled = $trace_enabled;
  52         $this->startTimer('unprofiled');
  53     }
  54
  55     // Public Methods
  56
  57     /**
  58     *   Start an individual timer
  59     *   This will pause the running timer and place it on a stack.
  60     *   @param string $name name of the timer
  61     *   @param string optional $desc description of the timer
  62     */
  63     function startTimer($name, $desc="" ){
  64         $this->trace.="start   $name\n";
  65         $n=array_push( $this->stack, $this->cur_timer );
  66         $this->__suspendTimer( $this->stack[$n-1] );
  67         $this->startTime[$name] = $this->getMicroTime();
  68         $this->cur_timer=$name;
  69         $this->description[$name] = $desc;
  70         if (!array_key_exists($name,$this->count))
  71             $this->count[$name] = 1;
  72         else
  73             $this->count[$name]++;
  74     }
  75
  76     /**
  77     *   Stop an individual timer
  78     *   Restart the timer that was running before this one
  79     *   @param string $name name of the timer
  80     */
  81     function stopTimer($name){
  82         $this->trace.="stop    $name\n";
  83         $this->endTime[$name] = $this->getMicroTime();
  84         if (!array_key_exists($name, $this->running))
  85             $this->running[$name] = $this->elapsedTime($name);
  86         else
  87             $this->running[$name] += $this->elapsedTime($name);
  88         $this->cur_timer=array_pop($this->stack);
  89         $this->__resumeTimer($this->cur_timer);
  90     }
  91
  92     /**
  93     *   measure the elapsed time of a timer without stoping the timer if
  94     *   it is still running
  95     */
  96     function elapsedTime($name){
  97         // This shouldn't happen, but it does once.
  98         if (!array_key_exists($name,$this->startTime))
  99             return 0;
 100
 101         if(array_key_exists($name,$this->endTime)){
 102             return ($this->endTime[$name] - $this->startTime[$name]);
 103         } else {
 104             $now=$this->getMicroTime();
 105             return ($now - $this->startTime[$name]);
 106         }
 107     }//end start_time
 108
 109     /**
 110     *   Measure the elapsed time since the profile class was initialised
 111     *
 112     */
 113     function elapsedOverall(){
 114         $oaTime = $this->getMicroTime() - $this->initTime;
 115         return($oaTime);
 116     }//end start_time
 117
 118     /**
 119     *   print out a log of all the timers that were registered
 120     *
 121     */
 122     function printTimers($enabled=false)
 123     {
 124         if($this->output_enabled||$enabled){
 125             $TimedTotal = 0;
 126             $tot_perc = 0;
 127             ksort($this->description);
 128             print("<pre>\n");
 129             $oaTime = $this->getMicroTime() - $this->initTime;
 130             echo"============================================================================\n";
 131             echo "                              PROFILER OUTPUT\n";
 132             echo"============================================================================\n";
 133             print( "Calls                    Time  Routine\n");
 134             echo"-----------------------------------------------------------------------------\n";
 135             while (list ($key, $val) = each ($this->description)) {
 136                 $t = $this->elapsedTime($key);
 137                 $total = $this->running[$key];
 138                 $count = $this->count[$key];
 139                 $TimedTotal += $total;
 140                 $perc = ($total/$oaTime)*100;
 141                 $tot_perc+=$perc;
 142                 // $perc=sprintf("%3.2f", $perc );
 143                 printf( "%3d    %3.4f ms (%3.2f %%)  %s\n", $count, $total*1000, $perc, $key);
 144             }
 145
 146             echo "\n";
 147
 148             $missed=$oaTime-$TimedTotal;
 149             $perc = ($missed/$oaTime)*100;
 150             $tot_perc+=$perc;
 151             // $perc=sprintf("%3.2f", $perc );
 152             printf( "       %3.4f ms (%3.2f %%)  %s\n", $missed*1000,$perc, "Missed");
 153
 154             echo"============================================================================\n";
 155
 156             printf( "       %3.4f ms (%3.2f %%)  %s\n", $oaTime*1000,$tot_perc, "OVERALL TIME");
 157
 158             echo"============================================================================\n";
 159
 160             print("</pre>");
 161         }
 162     }
 163
 164     function printTrace( $enabled=false )
 165     {
 166         if($this->trace_enabled||$enabled){
 167             print("<pre>");
 168             print("Trace\n$this->trace\n\n");
 169             print("</pre>");
 170         }
 171     }
 172
 173     /// Internal Use Only Functions
 174
 175     /**
 176     * Get the current time as accuratly as possible
 177     *
 178     */
 179     function getMicroTime(){
 180         $tmp=explode(" ",microtime());
 181         $rt=$tmp[0]+$tmp[1];
 182         return $rt;
 183     }
 184
 185     /**
 186     * resume  an individual timer
 187     *
 188     */
 189     function __resumeTimer($name){
 190         $this->trace.="resume  $name\n";
 191         $this->startTime[$name] = $this->getMicroTime();
 192     }
 193
 194     /**
 195     *   suspend  an individual timer
 196     *
 197     */
 198     function __suspendTimer($name){
 199         $this->trace.="suspend $name\n";
 200         $this->endTime[$name] = $this->getMicroTime();
 201         if (!array_key_exists($name, $this->running))
 202             $this->running[$name] = $this->elapsedTime($name);
 203         else
 204             $this->running[$name] += $this->elapsedTime($name);
 205     }
 206 }
 207
 208 function profiler_start($name) {
 209     if (array_key_exists("midcom_profiler",$GLOBALS))
 210       $GLOBALS["midcom_profiler"]->startTimer ($name);
 211 }
 212
 213 function profiler_stop($name) {
 214     if (array_key_exists("midcom_profiler",$GLOBALS))
 215       $GLOBALS["midcom_profiler"]->stopTimer ($name);
 216 }
 217
 218 ?>