maintenance/benchmarkPurge.php

   1 <?php
   2 /**
   3  * Squid purge benchmark script
   4  *
   5  * @file
   6  * @ingroup Maintenance
   7  */
   8
   9 /** */
  10 require_once( "commandLine.inc" );
  11
  12 /**
  13  * Run a bunch of URLs through SquidUpdate::purge()
  14  * to benchmark Squid response times.
  15  * @param $urls array A bunch of URLs to purge
  16  * @param $trials int How many times to run the test?
  17  */
  18 function benchSquid( $urls, $trials = 1 ) {
  19         $start = wfTime();
  20         for( $i = 0; $i < $trials; $i++) {
  21                 SquidUpdate::purge( $urls );
  22         }
  23         $delta = wfTime() - $start;
  24         $pertrial = $delta / $trials;
  25         $pertitle = $pertrial / count( $urls );
  26         return sprintf( "%4d titles in %6.2fms (%6.2fms each)",
  27                 count( $urls ), $pertrial * 1000.0, $pertitle * 1000.0 );
  28 }
  29
  30 /**
  31  * Get an array of randomUrl()'s.
  32  * @param $length int How many urls to add to the array
  33  */
  34 function randomUrlList( $length ) {
  35         $list = array();
  36         for( $i = 0; $i < $length; $i++ ) {
  37                 $list[] = randomUrl();
  38         }
  39         return $list;
  40 }
  41
  42 /**
  43  * Return a random URL of the wiki. Not necessarily an actual title in the
  44  * database, but at least a URL that looks like one.
  45  */
  46 function randomUrl() {
  47         global $wgServer, $wgArticlePath;
  48         return $wgServer . str_replace( '$1', randomTitle(), $wgArticlePath );
  49 }
  50
  51 /**
  52  * Create a random title string (not necessarily a Title object).
  53  * For use with randomUrl().
  54  */
  55 function randomTitle() {
  56         $str = '';
  57         $length = mt_rand( 1, 20 );
  58         for( $i = 0; $i < $length; $i++ ) {
  59                 $str .= chr( mt_rand( ord('a'), ord('z') ) );
  60         }
  61         return ucfirst( $str );
  62 }
  63
  64 if( !$wgUseSquid ) {
  65         wfDie( "Squid purge benchmark doesn't do much without squid support on.\n" );
  66 } else {
  67         printf( "There are %d defined squid servers:\n", count( $wgSquidServers ) );
  68         #echo implode( "\n", $wgSquidServers ) . "\n";
  69         if( isset( $options['count'] ) ) {
  70                 $lengths = array( intval( $options['count'] ) );
  71         } else {
  72                 $lengths = array( 1, 10, 100 );
  73         }
  74         foreach( $lengths as $length ) {
  75                 $urls = randomUrlList( $length );
  76                 $trial = benchSquid( $urls );
  77                 print "$trial\n";
  78         }
  79 }