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<?php
# This file is only included if profiling is enabled
function wfProfileIn( $functionname )
{
global $wgProfiler;
$wgProfiler->profileIn( $functionname );
}
function wfProfileOut( $functionname = "missing" )
{
global $wgProfiler;
$wgProfiler->profileOut( $functionname );
}
function wfGetProfilingOutput( $start, $elapsed ) {
global $wgProfiler;
return $wgProfiler->getOutput( $start, $elapsed );
}
function wfProfileClose()
{
global $wgProfiler;
$wgProfiler->close();
}
class Profiler
{
var $mStack = array(), $mWorkStack = array(), $mCollated = array();
var $mCalls = array(), $mTotals = array();
/*
function Profiler()
{
$this->mProfileStack = array();
$this->mWorkStack = array();
$this->mCollated = array();
}
*/
function profileIn( $functionname )
{
global $wgDebugFunctionEntry;
if ( $wgDebugFunctionEntry && function_exists( "wfDebug" ) ) {
wfDebug( "Entering $functionname\n" );
}
array_push( $this->mWorkStack, array($functionname, count( $this->mWorkStack ), microtime() ) );
}
function profileOut( $functionname)
{
global $wgDebugProfiling, $wgDebugFunctionEntry;
if ( $wgDebugFunctionEntry && function_exists( "wfDebug" ) ) {
wfDebug( "Exiting $functionname\n" );
}
$bit = array_pop( $this->mWorkStack );
if ( !$bit ) {
wfDebug( "Profiling error, !\$bit: $functionname\n" );
} else {
if ( $wgDebugProfiling ) {
if ( $functionname == "close" ) {
wfDebug( "Profile section ended by close(): {$bit[0]}\n" );
} elseif ( $bit[0] != $functionname ) {
wfDebug( "Profiling error: in({$bit[0]}), out($functionname)\n" );
}
}
array_push( $bit, microtime() );
array_push( $this->mStack, $bit );
}
}
function close()
{
while ( count( $this->mWorkStack ) ) {
$this->profileOut( "close" );
}
}
function getOutput( $scriptStart, $scriptElapsed )
{
if( !count( $this->mStack ) ) {
return "No profiling output\n";
}
$this->close();
$width = 125;
$format = "%-" . ($width - 28) . "s %6d %6.3f %6.3f %6.3f%%\n";
$titleFormat = "%-" . ($width - 28) . "s %9s %9s %9s %9s\n";
$prof = "\nProfiling data\n";
$prof .= sprintf( $titleFormat, "Name", "Calls", "Total", "Each", "%" );
$this->mCollated = array();
$this->mCalls = 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" );
# Collate
foreach ( $this->mStack as $entry ) {
$fname = $entry[0];
$thislevel = $entry[1];
$start = explode( " ", $entry[2]);
$start = (float)$start[0] + (float)$start[1];
$end = explode( " ", $entry[3]);
$end = (float)$end[0] + (float)$end[1];
$elapsed = $end - $start;
if ( !array_key_exists( $fname, $this->mCollated ) ) {
$this->mCollated[$fname] = 0;
$this->mCalls[$fname] = 0;
}
$this->mCollated[$fname] += $elapsed;
$this->mCalls[$fname] ++;
}
$total = @$this->mCollated["-total"];
$overhead = $this->mCollated["-overhead-internal"] / $profileCount;
$this->mCalls["-overhead-total"] = $profileCount;
# Output
foreach ( $this->mCollated as $fname => $elapsed ) {
$calls = $this->mCalls[$fname];
# Adjust for overhead
if ( $fname[0] != "-" ) {
$elapsed -= $overhead * $calls;
}
$percent = $total ? 100. * $elapsed / $total : 0;
$prof .= sprintf( $format, $fname, $calls, (float)($elapsed * 1000),
(float)($elapsed * 1000) / $calls, $percent );
global $wgProfileToDatabase;
if( $wgProfileToDatabase ) {
Profiler::logToDB( $fname, (float)($elapsed * 1000), $calls );
}
}
$prof .= "\nTotal: $total\n\n";
return $prof;
}
/* static */ function logToDB($name, $timeSum, $eventCount)
{
$name = wfStrencode( $name );
$sql = "UPDATE profiling ".
"SET pf_count=pf_count+{$eventCount}, ".
"pf_time=pf_time + {$timeSum} ".
"WHERE pf_name='{$name}'";
wfQuery($sql , DB_WRITE);
$rc = wfAffectedRows();
if( $rc == 0) {
$sql = "INSERT IGNORE INTO profiling (pf_name,pf_count,pf_time) ".
"VALUES ('{$name}', {$eventCount}, {$timeSum}) ";
wfQuery($sql , DB_WRITE);
$rc = wfAffectedRows();
}
// 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)";
}
}
$wgProfiler = new Profiler();
$wgProfiler->profileIn( "-total" );
?>
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