Your IP : 172.69.214.232
<?php
/**
* @defgroup Profiler Profiler
*
* @file
* @ingroup Profiler
* This file is only included if profiling is enabled
*/
/** backward compatibility */
$wgProfiling = true;
/**
* Begin profiling of a function
* @param $functionname name of the function we will profile
*/
function wfProfileIn( $functionname ) {
global $wgProfiler;
$wgProfiler->profileIn( $functionname );
}
/**
* Stop profiling of a function
* @param $functionname name of the function we have profiled
*/
function wfProfileOut( $functionname = 'missing' ) {
global $wgProfiler;
$wgProfiler->profileOut( $functionname );
}
/**
* Returns a profiling output to be stored in debug file
*
* @param $start Float
* @param $elapsed Float: time elapsed since the beginning of the request
*/
function wfGetProfilingOutput( $start, $elapsed ) {
global $wgProfiler;
return $wgProfiler->getOutput( $start, $elapsed );
}
/**
* Close opened profiling sections
*/
function wfProfileClose() {
global $wgProfiler;
$wgProfiler->close();
}
if (!function_exists('memory_get_usage')) {
# Old PHP or --enable-memory-limit not compiled in
function memory_get_usage() {
return 0;
}
}
/**
* @ingroup Profiler
* @todo document
*/
class Profiler {
var $mStack = array (), $mWorkStack = array (), $mCollated = array ();
var $mCalls = array (), $mTotals = array ();
function __construct() {
// Push an entry for the pre-profile setup time onto the stack
global $wgRequestTime;
if ( !empty( $wgRequestTime ) ) {
$this->mWorkStack[] = array( '-total', 0, $wgRequestTime, 0 );
$this->mStack[] = array( '-setup', 1, $wgRequestTime, 0, microtime(true), 0 );
} else {
$this->profileIn( '-total' );
}
}
/**
* Called by wfProfieIn()
* @param $functionname string
*/
function profileIn( $functionname ) {
global $wgDebugFunctionEntry, $wgProfiling;
if( !$wgProfiling ) return;
if( $wgDebugFunctionEntry ){
$this->debug( str_repeat( ' ', count( $this->mWorkStack ) ) . 'Entering ' . $functionname . "\n" );
}
$this->mWorkStack[] = array( $functionname, count( $this->mWorkStack ), $this->getTime(), memory_get_usage() );
}
/**
* Called by wfProfieOut()
* @param $functionname string
*/
function profileOut($functionname) {
global $wgDebugFunctionEntry, $wgProfiling;
if( !$wgProfiling ) return;
$memory = memory_get_usage();
$time = $this->getTime();
if( $wgDebugFunctionEntry ){
$this->debug( str_repeat( ' ', count( $this->mWorkStack ) - 1 ) . 'Exiting ' . $functionname . "\n" );
}
$bit = array_pop($this->mWorkStack);
if (!$bit) {
$this->debug("Profiling error, !\$bit: $functionname\n");
} else {
//if( $wgDebugProfiling ){
if( $functionname == 'close' ){
$message = "Profile section ended by close(): {$bit[0]}";
$this->debug( "$message\n" );
$this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
}
elseif( $bit[0] != $functionname ){
$message = "Profiling error: in({$bit[0]}), out($functionname)";
$this->debug( "$message\n" );
$this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
}
//}
$bit[] = $time;
$bit[] = $memory;
$this->mStack[] = $bit;
}
}
/**
* called by wfProfileClose()
*/
function close() {
global $wgProfiling;
# Avoid infinite loop
if( !$wgProfiling )
return;
while( count( $this->mWorkStack ) ){
$this->profileOut( 'close' );
}
}
/**
* called by wfGetProfilingOutput()
*/
function getOutput() {
global $wgDebugFunctionEntry, $wgProfileCallTree;
$wgDebugFunctionEntry = false;
if( !count( $this->mStack ) && !count( $this->mCollated ) ){
return "No profiling output\n";
}
$this->close();
if( $wgProfileCallTree ) {
global $wgProfileToDatabase;
# XXX: We must call $this->getFunctionReport() to log to the DB
if( $wgProfileToDatabase ) {
$this->getFunctionReport();
}
return $this->getCallTree();
} else {
return $this->getFunctionReport();
}
}
/**
* returns a tree of function call instead of a list of functions
*/
function getCallTree() {
return implode( '', array_map( array( &$this, 'getCallTreeLine' ), $this->remapCallTree( $this->mStack ) ) );
}
/**
* Recursive function the format the current profiling array into a tree
*
* @param $stack profiling array
*/
function remapCallTree( $stack ) {
if( count( $stack ) < 2 ){
return $stack;
}
$outputs = array ();
for( $max = count( $stack ) - 1; $max > 0; ){
/* Find all items under this entry */
$level = $stack[$max][1];
$working = array ();
for( $i = $max -1; $i >= 0; $i-- ){
if( $stack[$i][1] > $level ){
$working[] = $stack[$i];
} else {
break;
}
}
$working = $this->remapCallTree( array_reverse( $working ) );
$output = array();
foreach( $working as $item ){
array_push( $output, $item );
}
array_unshift( $output, $stack[$max] );
$max = $i;
array_unshift( $outputs, $output );
}
$final = array();
foreach( $outputs as $output ){
foreach( $output as $item ){
$final[] = $item;
}
}
return $final;
}
/**
* Callback to get a formatted line for the call tree
*/
function getCallTreeLine( $entry ) {
list( $fname, $level, $start, /* $x */, $end) = $entry;
$delta = $end - $start;
$space = str_repeat(' ', $level);
# The ugly double sprintf is to work around a PHP bug,
# which has been fixed in recent releases.
return sprintf( "%10s %s %s\n", trim( sprintf( "%7.3f", $delta * 1000.0 ) ), $space, $fname );
}
function getTime() {
return microtime(true);
#return $this->getUserTime();
}
function getUserTime() {
$ru = getrusage();
return $ru['ru_utime.tv_sec'].' '.$ru['ru_utime.tv_usec'] / 1e6;
}
/**
* Returns a list of profiled functions.
* Also log it into the database if $wgProfileToDatabase is set to true.
*/
function getFunctionReport() {
global $wgProfileToDatabase;
$width = 140;
$nameWidth = $width - 65;
$format = "%-{$nameWidth}s %6d %13.3f %13.3f %13.3f%% %9d (%13.3f -%13.3f) [%d]\n";
$titleFormat = "%-{$nameWidth}s %6s %13s %13s %13s %9s\n";
$prof = "\nProfiling data\n";
$prof .= sprintf( $titleFormat, 'Name', 'Calls', 'Total', 'Each', '%', 'Mem' );
$this->mCollated = array ();
$this->mCalls = array ();
$this->mMemory = array ();
# Estimate profiling overhead
$profileCount = count($this->mStack);
wfProfileIn( '-overhead-total' );
for( $i = 0; $i < $profileCount; $i ++ ){
wfProfileIn( '-overhead-internal' );
wfProfileOut( '-overhead-internal' );
}
wfProfileOut( '-overhead-total' );
# First, subtract the overhead!
$overheadTotal = $overheadMemory = $overheadInternal = array();
foreach( $this->mStack as $entry ){
$fname = $entry[0];
$start = $entry[2];
$end = $entry[4];
$elapsed = $end - $start;
$memory = $entry[5] - $entry[3];
if( $fname == '-overhead-total' ){
$overheadTotal[] = $elapsed;
$overheadMemory[] = $memory;
}
elseif( $fname == '-overhead-internal' ){
$overheadInternal[] = $elapsed;
}
}
$overheadTotal = array_sum( $overheadTotal ) / count( $overheadInternal );
$overheadMemory = array_sum( $overheadMemory ) / count( $overheadInternal );
$overheadInternal = array_sum( $overheadInternal ) / count( $overheadInternal );
# Collate
foreach( $this->mStack as $index => $entry ){
$fname = $entry[0];
$start = $entry[2];
$end = $entry[4];
$elapsed = $end - $start;
$memory = $entry[5] - $entry[3];
$subcalls = $this->calltreeCount( $this->mStack, $index );
if( !preg_match( '/^-overhead/', $fname ) ){
# Adjust for profiling overhead (except special values with elapsed=0
if( $elapsed ) {
$elapsed -= $overheadInternal;
$elapsed -= ($subcalls * $overheadTotal);
$memory -= ($subcalls * $overheadMemory);
}
}
if( !array_key_exists( $fname, $this->mCollated ) ){
$this->mCollated[$fname] = 0;
$this->mCalls[$fname] = 0;
$this->mMemory[$fname] = 0;
$this->mMin[$fname] = 1 << 24;
$this->mMax[$fname] = 0;
$this->mOverhead[$fname] = 0;
}
$this->mCollated[$fname] += $elapsed;
$this->mCalls[$fname]++;
$this->mMemory[$fname] += $memory;
$this->mMin[$fname] = min($this->mMin[$fname], $elapsed);
$this->mMax[$fname] = max($this->mMax[$fname], $elapsed);
$this->mOverhead[$fname] += $subcalls;
}
$total = @$this->mCollated['-total'];
$this->mCalls['-overhead-total'] = $profileCount;
# Output
arsort( $this->mCollated, SORT_NUMERIC );
foreach( $this->mCollated as $fname => $elapsed ){
$calls = $this->mCalls[$fname];
$percent = $total ? 100. * $elapsed / $total : 0;
$memory = $this->mMemory[$fname];
$prof .= sprintf($format, substr($fname, 0, $nameWidth), $calls, (float) ($elapsed * 1000), (float) ($elapsed * 1000) / $calls, $percent, $memory, ($this->mMin[$fname] * 1000.0), ($this->mMax[$fname] * 1000.0), $this->mOverhead[$fname]);
# Log to the DB
if( $wgProfileToDatabase ) {
self::logToDB($fname, (float) ($elapsed * 1000), $calls, (float) ($memory) );
}
}
$prof .= "\nTotal: $total\n\n";
return $prof;
}
/**
* Counts the number of profiled function calls sitting under
* the given point in the call graph. Not the most efficient algo.
*
* @param $stack Array:
* @param $start Integer:
* @return Integer
* @private
*/
function calltreeCount($stack, $start) {
$level = $stack[$start][1];
$count = 0;
for ($i = $start -1; $i >= 0 && $stack[$i][1] > $level; $i --) {
$count ++;
}
return $count;
}
/**
* Log a function into the database.
*
* @param $name string: function name
* @param $timeSum float
* @param $eventCount int: number of times that function was called
*/
static function logToDB( $name, $timeSum, $eventCount, $memorySum ){
# Do not log anything if database is readonly (bug 5375)
if( wfReadOnly() ) { return; }
global $wgProfilePerHost;
$dbw = wfGetDB( DB_MASTER );
if( !is_object( $dbw ) )
return false;
$errorState = $dbw->ignoreErrors( true );
$name = substr($name, 0, 255);
if( $wgProfilePerHost ){
$pfhost = wfHostname();
} else {
$pfhost = '';
}
// Kludge
$timeSum = ($timeSum >= 0) ? $timeSum : 0;
$memorySum = ($memorySum >= 0) ? $memorySum : 0;
$dbw->update( 'profiling',
array(
"pf_count=pf_count+{$eventCount}",
"pf_time=pf_time+{$timeSum}",
"pf_memory=pf_memory+{$memorySum}",
),
array(
'pf_name' => $name,
'pf_server' => $pfhost,
),
__METHOD__ );
$rc = $dbw->affectedRows();
if ($rc == 0) {
$dbw->insert('profiling', array ('pf_name' => $name, 'pf_count' => $eventCount,
'pf_time' => $timeSum, 'pf_memory' => $memorySum, 'pf_server' => $pfhost ),
__METHOD__, array ('IGNORE'));
}
// When we upgrade to mysql 4.1, the insert+update
// can be merged into just a insert with this construct added:
// "ON DUPLICATE KEY UPDATE ".
// "pf_count=pf_count + VALUES(pf_count), ".
// "pf_time=pf_time + VALUES(pf_time)";
$dbw->ignoreErrors( $errorState );
}
/**
* Get the function name of the current profiling section
*/
function getCurrentSection() {
$elt = end( $this->mWorkStack );
return $elt[0];
}
/**
* Get function caller
* @param $level int
*/
static function getCaller( $level ) {
$backtrace = wfDebugBacktrace();
if ( isset( $backtrace[$level] ) ) {
if ( isset( $backtrace[$level]['class'] ) ) {
$caller = $backtrace[$level]['class'] . '::' . $backtrace[$level]['function'];
} else {
$caller = $backtrace[$level]['function'];
}
} else {
$caller = 'unknown';
}
return $caller;
}
/**
* Add an entry in the debug log file
* @param $s string to output
*/
function debug( $s ) {
if( function_exists( 'wfDebug' ) ) {
wfDebug( $s );
}
}
}