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ezmyreplay.php
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ezmyreplay.php
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<?php
/**
* ezmyreplay.php: replay mysql queries taken from the slow query log.
* Inspired by Percona's percona-playback tool
*
* @author G. Giunta
* @license GNU GPL 2.0
* @copyright (C) G. Giunta 2012-2019
*
* It uses a multi-process scheme (tested to be working both on windows and linux):
* you will need php-cli installed for this to work.
* It can be run both as command-line script and as web page.
* It defaults to executing immediately, but you can actually include() it from
* your app and use it as a plain php class, by defining the EZMYREPLAY_AS_LIB constant
* before including this file.
*
* @todo add parsing of options from query string for web access
* @todo support not entering password on cli + hide it from process list
* @todo allow to replay only 1 user session if there are many in the mysql slow log
* @todo add support for mysql, pdo libraries
* @todo at high debug levels print mysql error messages
*/
if ( !defined( 'EZMYREPLAY_AS_LIB' ) )
{
if( !function_exists( 'mysqli_connect' ) && !function_exists( 'mysql_connect' ) && !defined( 'PDO::MYSQL_ATTR_USE_BUFFERED_QUERY' ) )
{
echo( 'Missing mysql client libraries, cannot run' );
exit( 1 );
}
$rp = new eZMyReplay();
if ( php_sapi_name() == 'cli' )
{
// parse cli options (die with help msg if needed)
$rp->parseArgs( $argv );
}
else
{
// parse options in array format (die with help msg if needed)
$rp->parseOpts( $_GET );
}
// will run in either parent or child mode, depending on parsed options
$rp->run();
}
class eZMyReplay
{
static $version = '0.1';
static $defaults = array(
// 'real' options
'verbosity' => 1, // -v verbosity How much troubleshooting info to print
'children' => 1, // -c concurrency Number of multiple requests to make
'tries' => 1, // -n requests Number of times to perform replay
'user' => '', // u
'password' => '', // p
'host' => 'localhost', // h
'port' => 3306, // P
'database' => '', // D
'logfile' => '',
'client' => 'mysqli',
'format' => 'slowquerylog',
'skippercentiles' => false,
/*'timeout' => 0, // -t timelimit Seconds to max. wait for responses
'auth' => false,
'proxy' => false,
'proxyauth' => false,
'target' => '',
'keepalive' => false,
'head' => false,
'interface' => '',
'respencoding' => false,*/
// 'internal' options
'childnr' => false,
'parentid' => false,
// the actual script path (self)
'self' => __FILE__,
'php' => 'php',
'outputformat' => 'text',
'haltonerrors' => true,
'command' => 'runparent' // allowed: 'helpmsg', 'versionmsg', 'runparent', 'runchild', 'runparse'
);
// config options for this instance
protected $opts = array();
public function __construct( $opts = array() )
{
$this->opts = self::$defaults;
$this->opts['outputformat'] = ( php_sapi_name() == 'cli' ) ? 'text' : 'html';
$this->opts['haltonerrors'] = !defined( 'EZMYREPLAY_AS_LIB' );
$this->opts = array_merge( $this->opts, $opts );
}
/**
* Actual execution of the test, echoes results to stdout.
* Depending on options, calls runParent or runChild, or echoes help messages
* @throws Exception
*/
public function run()
{
switch ( $this->opts['command'] )
{
case 'runparent':
return $this->runParent( false );
case 'runparse':
echo json_encode( $this->runParent( true ) );
break;
case 'runchild':
echo $this->runChild();
break;
case 'versionmsg':
echo $this->versionMsg();
break;
case 'helpmsg':
echo $this->helpMsg();
break;
default:
$this->abort( 1 , 'Unkown running mode: ' . $this->opts['command'] );
}
}
/**
* Runs the test, prints results (unless verbosity option has been set to 0).
* Note: sets a value to $this->opts['parentid'], too
* @return array
* @throws Exception
*/
public function runParent( $only_return_parsed=false )
{
// mandatory option
if ( $this->opts['logfile'] == '' )
{
echo $this->helpMsg();
$this->abort( 1 );
}
/// @todo: ask for password (and try to avoid plaintext passwd passed to child procs because it still shows up in ps calls)
if ( $this->opts['password'] == '' )
{
}
if ( $this->opts['verbosity'] > 1 )
{
echo $this->versionMsg();
}
if ( $this->opts['outputformat'] == 'html' && $this->opts['verbosity'] > 1 )
{
echo '<pre>';
}
$this->opts['parentid'] = time() . "." . getmypid(); // make it as unique as possible
$opts = $this->opts;
//$child_tries = (int) ( $opts['tries'] / $opts['children'] );
$php = $this->getPHPExecutable( $opts['php'] );
if ( !is_file( $opts['logfile'] ) || !is_readable( $opts['logfile'] ) )
{
$this->abort( 1, "Mysql log file '{$opts['logfile']}' can not be read" );
}
$parsed = $this->parseLogFile( $opts['logfile'], $opts['format'] );
$statements_count = count( $parsed );
if ( !$statements_count )
{
$this->abort( 1, "Mysql log file '{$opts['logfile']}' does not contain any SQL statement" );
}
if ( $only_return_parsed )
{
return $parsed;
}
/// @todo test that we can connect to selected db before launching children?
// save data from parsed logfile to temporary file, unless it's already done
if ( $opts['format'] == 'json' )
{
$tmplogfile = $opts['logfile'];
}
else
{
/// @todo use unique filename (see tempnamm() )
$tmplogfile = 'xxx.tmp';
if ( !file_put_contents( $tmplogfile, json_encode( $parsed ) ) )
{
$this->abort( "Could not create temporary file $tmplogfile" );
}
}
$this->echoMsg( "Replaying $statements_count queries (please be patient)...\n" );
// != from percona-playback output
$this->echoMsg( "\nRunning " . $opts['tries'] * $statements_count . " queries with {$opts['children']} parallel processes\n", 2 );
$this->echoMsg( "----------------------------------------\n", 2 );
/// @todo !important move cli opts reconstruction to a separate function
$args = "--parent " . $opts['parentid'];
$args .= " -n " . $opts['tries'] .
" -u " . escapeshellarg( $opts['user'] ) .
" -p " . escapeshellarg( $opts['password'] ) .
" -h " . escapeshellarg( $opts['host'] ) .
" -P " . escapeshellarg( $opts['port'] ) .
" -D " . escapeshellarg( $opts['database'] ) .
" --client " . escapeshellarg( $opts['client'] ) .
" -v " . $opts['verbosity'] .
" --format json";
/// @todo pass as well "type of mysql lib" param
$args .= " " . escapeshellarg( $tmplogfile );
//$starttimes = array();
$pipes = array();
$childprocs = array();
//$childresults = array();
//$time = microtime( true );
// start children
for ( $i = 0; $i < $opts['children']; $i++ )
{
//var_dump( escapeshellcmd( $php ) . " " . escapeshellarg( $opts['self'] ) . " --child $i " . $args );
$exec = escapeshellcmd( $php ) . " " . escapeshellarg( $opts['self'] ) . " --child $i " . $args;
//$starttimes[$i] = microtime( true );
$pipes[$i] = null;
$childprocs[$i] = proc_open(
$exec,
array( array( 'pipe','r' ), array( 'pipe','w' ), array( 'pipe', 'a' ) ),
$pipes[$i]
);
fclose( $pipes[$i][0] );
if ( !$childprocs[$i] )
{
/// @todo kill all open children, exit
// before using this line test that other children are terminated ok...
//$this->abort( 1, "Child process $i did not start correctly. Exiting" );
}
$this->echoMsg( "Launched child $i [ $exec ]\n", 2 );
flush();
}
// wait for all children to finish
/// @todo add a global timeout limit?
$finished = 0;
//$outputs = array();
do
{
/// @todo !important lower this - use usleep
sleep( 1 );
for ( $i = 0; $i < $opts['children']; $i++ )
{
if ( $childprocs[$i] !== false )
{
/// @todo see note from Lachlan Mulcahy on http://it.php.net/manual/en/function.proc-get-status.php:
/// to make sure buffers are not blocking children, we should read rom their pipes every now and then
/// (but not on windows, since pipes are blocking and can not be timeoudt, see https://bugs.php.net/bug.php?id=54717)
$status = proc_get_status( $childprocs[$i] );
if ( $status['running'] == false )
{
$childrensults[$i] = array_merge( $status, array(
'output' => stream_get_contents( $pipes[$i][1] ),
'error' => stream_get_contents( $pipes[$i][2] ),
'return' => proc_close( $childprocs[$i] )
) );
$childprocs[$i] = false;
$finished++;
}
}
}
$this->echoMsg( "." );
if ( $opts['verbosity'] > 1 )
{
flush();
}
} while( $finished < $opts['children'] );
//$time = microtime( true ) - $time;
$this->echoMsg( "done\n" );
if ( $opts['format'] == 'json' )
{
unlink( $tmplogfile );
}
// print results
// != from percona-playback output
$this->echoMsg( "\nChildren output:\n----------------------------------------\n", 2 );
for ( $i = 0; $i < $opts['children']; $i++ )
{
/// @todo beautify
$this->echoMsg( $childrensults[$i]['output'] . "\n", 2 );
}
$this->echoMsg( "\nChildren details:\n----------------------------------------\n", 3 );
$this->echoMsg( var_export( $childrensults, true ), 3 );
$outputs = array();
foreach( $childrensults as $i => $res )
{
if ( $res['return'] != 0 || $res['output'] == '' )
{
$this->abort( 1, "Child process $i did not terminate correctly. Exiting" );
}
$outputs[$i] = $res['output'];
}
$data = $this->parseOutputs( $outputs );
$this->echoMsg( "\n\n" );
$this->echoMsg( "\nSummary:\n----------------------------------------\n", 2 );
$hasmeta = $data['rows_expected'] !== false;
$pcs = '';
if ( !$opts['skippercentiles'] )
{
$pcs = "\nPercentage of the queries executed within a certain time (ms)\n" .
" 50% " . sprintf( '%6u', $data['t_percentiles'][50] ) . "\n" .
" 66% " . sprintf( '%6u', $data['t_percentiles'][66] ) . "\n" .
" 75% " . sprintf( '%6u', $data['t_percentiles'][75] ) . "\n" .
" 80% " . sprintf( '%6u', $data['t_percentiles'][80] ) . "\n" .
" 90% " . sprintf( '%6u', $data['t_percentiles'][90] ) . "\n" .
" 95% " . sprintf( '%6u', $data['t_percentiles'][95] ) . "\n" .
" 98% " . sprintf( '%6u', $data['t_percentiles'][98] ) . "\n" .
" 99% " . sprintf( '%6u', $data['t_percentiles'][99] ) . "\n" .
" 100% " . sprintf( '%6u', $data['t_max'] * 1000 ) . " (longest request)";
}
$details = '';
foreach( array( 'SELECT', 'INSERT', 'UPDATE', 'DELETE', 'REPLACE', 'DROP', 'OTHER' ) as $type )
{
$details .= str_pad( $type . 's', 9 ) . ": {$data['queries'][$type]} queries" . ( $hasmeta ? "(" . $data['meta'][$type]['faster'] . " faster, " . $data['meta'][$type]['slower'] . " slower)\n" : "\n" );
}
$this->echoMsg(
"Detailed Report\n" .
"----------------\n" .
$details .
"\nReport\n" .
"------\n" .
"Executed {$data['tries']} queries\n" .
"Spent " . gmstrftime( '%H:%M:%S', (int)$data['tot_time'] ) . substr( strstr( $data['tot_time'], '.' ), 0, 7 ) . " executing queries\n" . //. ( $hasmeta ? " versus an expected XX time.\n" : "\n" ) .
( $hasmeta ? "{$data['meta']['faster']} queries were quicker than expected, {$data['meta']['slower']} were slower\n" : "" ) .
"A total of {$data['failures']} queries had errors.\n" .
( $hasmeta ? "Expected {$data['rows_expected']} rows, got {$data['tot_rows']} (a difference of " . ( $data['rows_expected'] - $data['tot_rows'] ) . ")\n" : "" ) .
( $hasmeta ? "Number of queries where number of rows differed: {$data['rows_differ_queries']}.\n" : "" ) .
"\nAverage of " . sprintf( '%.2f', $data['tries'] / $opts['children'] )." queries per connection ({$opts['children']} connections).\n" .
"\nQuery Times (ms)\n" .
" min mean[+/-sd] median max\n" .
/// @todo better formatting if numbers go over 5 digits (roughly 2 minutes)
"Total: " . sprintf( '%5u', $data['t_min'] * 1000 ) . " " . sprintf( '%5u', $data['t_avg'] * 1000 ) . " " . sprintf( '%5.1f', $data['t_stdddev'] ). " ". sprintf( '%5u', $data['t_median'] ) . " " . sprintf( '%5u', $data['t_max'] * 1000 ) . "\n" .
$pcs
);
return array(
'summary_data' => $data,
'children_details' => $childrensults
);
}
/**
* Executes the sql queries, returns a csv string with the collected data
* @return string
* @throws Exception
* @todo add support for pdo, mysql
*/
public function runChild()
{
$opts = $this->opts;
/// @todo !important code copied here from runParent, could be refactored in single, protected function
if ( !is_file( $opts['logfile'] ) || !is_readable( $opts['logfile'] ) )
{
$this->abort( 1, "Mysql log file '{$opts['logfile']}' can not be read" );
}
$parsed = $this->parseLogFile( $opts['logfile'], $opts['format'] );
$statements_count = count( $parsed );
if ( !$statements_count )
{
$this->abort( 1, "Mysql log file '{$opts['logfile']}' does not contain any SQL statement" );
}
$resp = array(
'tries' => 0, // incremented on every sql call
'failures' => 0, // nr of reqs
'tot_time' => 0.0, // secs (float) - time spent executing calls
't_min' => -1,
't_max' => 0,
't_avg' => 0,
'begin' => -1, // secs (float)
'end' => 0.0, // secs (float)
'rows' => array(), // index: gotten rows, value: nr. of responses received with that many
'tot_rows' => 0,
'times' => array(), // index: execution time (ms), value: nr. queries taking that time to execute
'queries' => array(
'SELECT' => 0,
'INSERT' => 0,
'UPDATE' => 0,
'DELETE' => 0,
'REPLACE' => 0,
'DROP' => 0,
'OTHER' => 0 ),
'rows_expected' => null, // NB: we later check for null != 0
'rows_differ_queries' => 0,
'meta' => array(
'SELECT' => array( 'faster' => 0, 'slower' => 0 ),
'INSERT' => array( 'faster' => 0, 'slower' => 0 ),
'UPDATE' => array( 'faster' => 0, 'slower' => 0 ),
'DELETE' => array( 'faster' => 0, 'slower' => 0 ),
'REPLACE' => array( 'faster' => 0, 'slower' => 0 ),
'DROP' => array( 'faster' => 0, 'slower' => 0 ),
'OTHER' => array( 'faster' => 0, 'slower' => 0 ) )
);
for ( $i = 0; $i < $opts['tries']; $i++ )
{
switch( $opts['client'] )
{
case 'mysqli':
// it seems that a bad $opts['database'] fails silently...
$my = @new mysqli( $opts['host'], $opts['user'], $opts['password'], $opts['database'], $opts['port'] );
/// @todo this check was broken up to php 5.2.9 / 5.3.0
if ( $my->connect_error )
{
$this->abort( 2, $my->connect_errno . ' ' . $my->connect_error );
}
foreach( $parsed as $j => $stmt )
{
// check that 'sql' member exists
/// @todo write a warning somewhere?
if ( !isset( $stmt['sql'] ) )
{
continue;
}
// avoid running USE statements if db is specified on command line
if ( $opts['password'] != '' && preg_match( '/^ *USE +/i', $stmt['sql'] ) )
{
continue;
}
$resp['tries'] = $resp['tries'] + 1;
$fetched = 0;
$start = microtime( true );
$res = $my->query( $stmt['sql'] );
//$ar = $my->affected_rows;
if ( is_object( $res ) )
{
// we get all data line by line, not to exhaust php memory by fetching all in 1 array
/// @todo test if using MYSQLI_NUM is really the faster way
while ( $res->fetch_array( MYSQLI_NUM ) !== null )
{
$fetched++;
}
$res->close();
}
$stop = microtime( true );
$time = $stop - $start;
$resp['tot_time'] = $resp['tot_time'] + $time;
if ( $time > $resp['t_max'] )
{
$resp['t_max'] = $time;
}
if ( $time < $resp['t_min'] || $resp['t_min'] == -1 )
{
$resp['t_min'] = $time;
}
if ( $res === false )
{
$resp['failures']++;
}
else
{
if ( $fetched )
{
$resp['rows'][$fetched] = isset( $resp['rows'][$fetched] ) ? ( $resp['rows'][$fetched] + 1 ) : 1;
}
$timemsec = (int) ( $time * 1000 );
$resp['times'][$timemsec] = isset( $resp['times'][$timemsec] ) ? ( $resp['times'][$timemsec] + 1 ) : 1;
$resp['tot_rows'] += $fetched;
}
if ( $resp['begin'] == -1 )
{
$resp['begin'] = $start;
}
/// @todo verify if this classifies correctly all queries based on type
if ( preg_match( '/^ *(SELECT|INSERT|UPDATE|DELETE|REPLACE|DROP) +/i', $stmt['sql'], $matches ) )
{
$type = strtoupper($matches[1]);
}
else
{
$type = 'OTHER';
}
$resp['queries'][$type] = $resp['queries'][$type] + 1;
if ( isset( $stmt['meta'] ) )
{
// compare with "older run" data
if ( isset( $stmt['meta']['rows_sent'] ) )
{
$resp['rows_expected'] += $stmt['meta']['rows_sent'];
}
if ( $stmt['meta']['rows_sent'] != $fetched )
{
$resp['rows_differ_queries']++;
}
if ( isset( $stmt['meta']['query_time'] ) )
{
/// truncate a bit?
if ( $stmt['meta']['query_time'] > $time )
{
$resp['meta'][$type]['faster']++;
}
else if ( $stmt['meta']['query_time'] < $time )
{
$resp['meta'][$type]['slower']++;
}
}
}
}
$my->close();
break;
default:
$this->abort( 1, "Support not implemented for client type {$opts['client']}" );
}
} // loop on number of passes
/// @bug this might never even have been set...
$resp['end'] = $stop;
if ( $resp['t_min'] == -1 )
{
$resp['t_min'] = 0;
}
$succesful = $resp['tries'] - $resp['failures'];
/// @bug $resp['tot_time'] includes time for failed requests as well...
if ( $succesful > 0 )
{
$resp['t_avg'] = $resp['tot_time'] / $succesful;
}
// use an "almost readable" csv format - not using dots or commas to avoid float problems
/// @todo !important move to a separate function
foreach( $resp['rows'] as $size => $count )
{
$resp['rows'][$size] = $size . '-' . $count;
}
ksort( $resp['rows'] );
$resp['rows'] = implode( '/', $resp['rows'] );
foreach( $resp['times'] as $time => $count )
{
$resp['times'][$time] = $time . '-' . $count;
}
ksort( $resp['times'] );
$resp['times'] = implode( '/', $resp['times'] );
foreach( $resp['queries'] as $type => $count )
{
$resp['queries'][$type] = $type . '-' . $count;
}
$resp['queries'] = implode( '/', $resp['queries'] );
foreach( $resp['meta'] as $type => $count )
{
$resp['meta'][$type] = $type . '-' . $count['faster'] . '-' . $count['slower'];
}
$resp['meta'] = implode( '/', $resp['meta'] );
foreach( $resp as $key => $val )
{
$resp[$key] = $key . ':' . $val;
}
return implode( ';', $resp );
}
/**
* Parses a mysql slow query log
* @parm string $filename
* @return array
*/
public function parseLogFile( $filename, $format )
{
switch( $format )
{
case 'parsed':
case 'json':
$parsed = json_decode( file_get_contents( $filename ), true );
if ( is_array( $parsed ) )
{
return $parsed;
}
else
{
/// @todo write some kind of warning
return array();
}
case 'slowquerylog':
default:
$sql = array();
$meta = array();
$parsed = array();
$lines = file( $filename, FILE_IGNORE_NEW_LINES );
//$headerdone = false;
/// @todo make sure we always parse correctly (skip) initial lines in log file
foreach ( $lines as $i => $line )
{
if ( strlen( $line ) && $line[0] == '#' )
{
// comment line
$sql = array();
if ( preg_match( '/^# User@Host: (.*)$/', $line, $matches ) )
{
}
else if ( preg_match( '/^# Query_time: +([0-9.]+) +Lock_time: +([0-9.]+) +Rows_sent: +([0-9.]+) +Rows_examined: ([0-9.]+)$/', $line, $matches ) )
{
$meta['query_time'] = $matches[1];
$meta['lock_time'] = $matches[2];
$meta['rows_sent'] = $matches[3];
$meta['rows_examined'] = $matches[4];
}
}
else
{
if ( substr( $line, -1 ) == ';' )
{
// end of sql stmt
// ignore these statements, added by mysql
if ( substr( $line, 0, 14 ) == 'SET timestamp=' )
{
/// @todo shall we check that there's no more than 1 stmt on this line?
$sql = array();
continue;
}
$sql[] = $line;
$pline = array ( 'sql' => join( "\n", $sql ) );
if ( count( $meta ) )
{
$pline['meta'] = $meta;
}
$parsed[] = $pline;
$sql = array();
$meta = array();
}
else
{
// unfinished sql
$sql[] = $line;
}
}
}
return $parsed;
}
}
/**
* Parse the output of children processes and calculate global stats
*/
protected function parseOutputs( $outputs )
{
$resp = array(
'tries' => 0, // incremented on every sql call
'failures' => 0, // nr of reqs
'tot_time' => 0.0, // secs (float) - time spent executing calls
't_min' => -1,
't_max' => 0,
't_avg' => 0,
'begin' => -1, // secs (float)
'end' => 0.0, // secs (float)
'rows' => array(), // index: gotten rows, value: nr. of responses received with that many rows
'tot_rows' => 0,
'times' => array(), // index: execution time (ms), value: nr. queries taking that time to execute
'queries' => array( // nr. of queries by type
'SELECT' => 0,
'INSERT' => 0,
'UPDATE' => 0,
'DELETE' => 0,
'REPLACE' => 0,
'DROP' => 0,
'OTHER' => 0 ),
'rows_expected' => null, // NB: we later check for null != 0
'rows_differ_queries' => 0,
'meta' => array( // comparison with original times from slow query log
'SELECT' => array( 'faster' => 0, 'slower' => 0 ),
'INSERT' => array( 'faster' => 0, 'slower' => 0 ),
'UPDATE' => array( 'faster' => 0, 'slower' => 0 ),
'DELETE' => array( 'faster' => 0, 'slower' => 0 ),
'REPLACE' => array( 'faster' => 0, 'slower' => 0 ),
'DROP' => array( 'faster' => 0, 'slower' => 0 ),
'OTHER' => array( 'faster' => 0, 'slower' => 0 ),
'faster' => 0, 'slower' => 0 ),
// calculated data
'rps' => 0.0,
't_stddev' => 0.0,
't_median' => 0, // msec
't_percentiles' => array()
);
$succesful = 0;
$combinedtime = 0;
foreach( $outputs as $i => $output )
{
/// @todo !important move the parsing to a separate function
$parsing = explode( ';', $output );
foreach ( $parsing as $item )
{
$parsed = explode( ':', $item, 2 );
$data[$parsed[0]]=$parsed[1];
}
$resp['tries'] += $data['tries'];
$resp['failures'] += $data['failures'];
if ( $resp['begin'] == -1 || $resp['begin'] > $data['begin'] )
{
$resp['begin'] = $data['begin'];
}
if ( $resp['end'] < $data['end'] )
{
$resp['end'] = $data['end'];
}
if ( $resp['t_min'] == -1 || $resp['t_min'] > $data['t_min'] )
{
$resp['t_min'] = $data['t_min'];
}
if ( $resp['t_max'] < $data['t_max'] )
{
$resp['t_max'] = $data['t_max'];
}
$resp['tot_rows'] += $data['tot_rows'];
if ( $data['rows_expected'] !== null )
{
$resp['rows_expected'] += $data['rows_expected'];
$resp['rows_differ_queries'] += $data['rows_differ_queries'];
foreach( explode( '/', $data['meta'] ) as $exp )
{
list( $type, $faster, $slower ) = explode( '-', $exp, 3 );
$resp['meta'][$type]['faster'] += $faster;
$resp['meta']['faster'] += $faster;
$resp['meta'][$type]['slower'] += $slower;
$resp['meta']['slower'] += $slower;
}
}
foreach( explode( '/', $data['rows'] ) as $size )
{
list( $size, $count ) = explode( '-', $size, 2 );
$resp['rows'][$size] = @$resp['rows'][$size] + $count;
}
foreach( explode( '/', $data['times'] ) as $time )
{
list( $time, $count ) = explode( '-', $time, 2 );
$resp['times'][$time] = @$resp['times'][$time] + $count;
}
foreach( explode( '/', $data['queries'] ) as $type )
{
list( $type, $count ) = explode( '-', $type, 2 );
$resp['queries'][$type] = @$resp['queries'][$type] + $count;
}
$succesful += ( $data['tries'] - $data['failures'] );
$combinedtime += $data['tot_time'];
}
if ( $succesful )
{
$resp['t_avg'] = $combinedtime / $succesful;
}
// median+percentile+standard deviation calculations
ksort( $resp['times'] );
$tot = 0;
$stddev = 0;
$percents = array( 1, 0.99, 0.98, 0.95, 0.9, 0.8, 0.75, 0.66, 0.5 );
$percent = array_pop( $percents );
foreach( $resp['times'] as $time => $count )
{
$tot += $count;
$stddev += ( pow( $time - $resp['t_avg'], 2 ) * $count );
while ( $tot >= ( $succesful * $percent ) && count( $percents ) )
{
$perc = $percent * 100;
$resp['t_percentiles'][$perc] = $time;
$percent = array_pop( $percents );
}
}
$resp['t_median'] = $resp['t_percentiles'][50];
$resp['t_stdddev'] = sqrt( $stddev / $tot );
$resp['tot_time'] = $resp['end'] - $resp['begin'];
if ( $resp['tot_time'] )
{
$resp['rps'] = $resp['tries'] / $resp['tot_time'];
}
return $resp;
}
/**
* @param string $php
* @return string
* @throws Exception
*/
protected function getPHPExecutable( $php='php' )
{
//$validExecutable = false;
do
{
$output = array();
exec( escapeshellcmd( $php ) . ' -v', $output );
if ( count( $output ) && strpos( $output[0], 'PHP' ) !== false )
{
return $php;
}
if ( php_sapi_name() == 'cli' && function_exists( 'readline' ) )
{
$input = readline( 'Enter path to PHP-CLI executable ( or [q] to quit )' );
if ( $input === 'q' )
{
$this->abort( 0 );
}
}
else
{
$this->abort( 1, "Can not run php subprocesses (executable: $php)" );
}
} while( true );
}
/**
* Parses args in argc/argv format (stores them, unless -h or -V are found, in which case only $this->opts['self'] is set)
* If any unknown option is found, prints help msg and exit.
* Nb: pre-existing otions are not reset by this call.
* @throws Exception
*/
public function parseArgs( $argv )
{
$options = array(
'u', 'p', 'h', 'P','D', 'format',
'child', 'parent', 'php', 'dump', 'client', 'v', 'V', 'help', 'version', 'n'
);
$singleoptions = array( 'V', 'help', 'dump', 'version' );
$longoptions = array();
foreach( $options as $o )
{
if ( strlen( $o ) > 1 )
{
$longoptions[] = $o;
}
}
$argc = count( $argv );
if ( $argc < 2 )
{
echo "ezmyreplay: wrong number of arguments\n";
echo $this->helpMsg( @$argv[0] );
$this->abort( 1 );
}
// symlinks, etc... trust $argv[0] better than __FILE__
$this->opts['self'] = @$argv[0];
// this->opts has already been initialized by constructor
$opts = $this->opts;
for ( $i = 1; $i < $argc; $i++ )
{
if ( $argv[$i][0] == '-' )
{
$opt = ltrim( $argv[$i], '-' );
$val = null;
/// @todo we should also allow long options with no space between opt and val
if ( !in_array( $opt, $longoptions ) )
{
if ( strlen( $opt ) > 1 )
{
$val = substr( $opt, 1 );
$opt = $opt[0];
}
}
if ( !in_array( $opt, $options ) )
{
// unknown option
echo $this->helpMsg();
$this->abort( 1 );
}
if ( $val === null && !in_array( $opt, $singleoptions ) )
{
$val = @$argv[$i+1];
if ( $val[0] == '-' )
{
// two options in a row: error
echo $this->helpMsg();
$this->abort( 1 );
}
$i++;
}
switch( $opt )
{
case 'help':
$this->opts['command'] = 'helpmsg';
return;
case 'version':
case 'V':
$this->opts['command'] = 'versionmsg';
return;
case 'u':
$opts['user'] = $val;
break;
case 'p':
$opts['password'] = $val;
break;
case 'h':
$opts['host'] = $val;
break;
case 'P':
$opts['port'] = $val;
break;
case 'D':
$opts['database'] = $val;
break;
case 'c':
$opts['children'] = (int)$val > 0 ? (int)$val : 1;
break;
case 'child':
$opts['childnr'] = (int)$val;
$opts['command'] = 'runchild';
break;
case 'dump':
$opts['command'] = 'runparse';
break;
case 'n':
$opts['tries'] = (int)$val > 0 ? (int)$val : 1;
break;
case 'parent':
$opts['parentid'] = $val;
break;
case 'php':
$opts['php'] = $val;
break;
case 'v':
$opts['verbosity'] = (int)$val;
break;
case 'format':
$opts['format'] = $val;
break;
case 'client':
$opts['client'] = $val;
break;
default:
// unknown option
echo $this->helpMsg();
$this->abort( 1 );
}
}
else
{
// end of options: argument
$opts['logfile'] = $argv[$i];
}
}
$this->opts = $opts;
}
/**
* Parses args in array format (stores them, unless -h or -V are found)
* If any unknown option is found, continues.
* Nb: pre-existing options are not reset by this call.
*