353 lines
9.3 KiB
PHP
353 lines
9.3 KiB
PHP
<?php
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/**
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* This file is only included if profiling is enabled
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* @package MediaWiki
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*/
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/**
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* @param $functioname name of the function we will profile
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*/
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function wfProfileIn($functionname) {
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global $wgProfiler;
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$wgProfiler->profileIn($functionname);
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}
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/**
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* @param $functioname name of the function we have profiled
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*/
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function wfProfileOut($functionname = 'missing') {
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global $wgProfiler;
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$wgProfiler->profileOut($functionname);
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}
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function wfGetProfilingOutput($start, $elapsed) {
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global $wgProfiler;
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return $wgProfiler->getOutput($start, $elapsed);
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}
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function wfProfileClose() {
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global $wgProfiler;
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$wgProfiler->close();
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}
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if (!function_exists('memory_get_usage')) {
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# Old PHP or --enable-memory-limit not compiled in
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function memory_get_usage() {
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return 0;
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}
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}
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/**
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* @todo document
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* @package MediaWiki
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*/
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class Profiler {
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var $mStack = array (), $mWorkStack = array (), $mCollated = array ();
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var $mCalls = array (), $mTotals = array ();
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function Profiler()
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{
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// Push an entry for the pre-profile setup time onto the stack
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global $wgRequestTime;
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if ( !empty( $wgRequestTime ) ) {
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$this->mWorkStack[] = array( '-total', 0, $wgRequestTime, 0 );
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$this->mStack[] = array( '-setup', 1, $wgRequestTime, 0, microtime(true), 0 );
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} else {
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$this->profileIn( '-total' );
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}
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}
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function profileIn($functionname) {
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global $wgDebugFunctionEntry;
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if ($wgDebugFunctionEntry && function_exists('wfDebug')) {
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wfDebug(str_repeat(' ', count($this->mWorkStack)).'Entering '.$functionname."\n");
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}
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$this->mWorkStack[] = array($functionname, count( $this->mWorkStack ), $this->getTime(), memory_get_usage());
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}
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function profileOut($functionname) {
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$memory = memory_get_usage();
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$time = $this->getTime();
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global $wgDebugFunctionEntry;
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if ($wgDebugFunctionEntry && function_exists('wfDebug')) {
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wfDebug(str_repeat(' ', count($this->mWorkStack) - 1).'Exiting '.$functionname."\n");
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}
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$bit = array_pop($this->mWorkStack);
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if (!$bit) {
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wfDebug("Profiling error, !\$bit: $functionname\n");
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} else {
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//if ($wgDebugProfiling) {
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if ($functionname == 'close') {
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$message = "Profile section ended by close(): {$bit[0]}";
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wfDebug( "$message\n" );
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$this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
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}
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elseif ($bit[0] != $functionname) {
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$message = "Profiling error: in({$bit[0]}), out($functionname)";
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wfDebug( "$message\n" );
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$this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
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}
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//}
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$bit[] = $time;
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$bit[] = $memory;
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$this->mStack[] = $bit;
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}
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}
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function close() {
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while (count($this->mWorkStack)) {
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$this->profileOut('close');
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}
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}
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function getOutput() {
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global $wgDebugFunctionEntry;
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$wgDebugFunctionEntry = false;
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if (!count($this->mStack) && !count($this->mCollated)) {
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return "No profiling output\n";
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}
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$this->close();
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global $wgProfileCallTree;
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if ($wgProfileCallTree) {
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return $this->getCallTree();
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} else {
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return $this->getFunctionReport();
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}
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}
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function getCallTree($start = 0) {
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return implode('', array_map(array (& $this, 'getCallTreeLine'), $this->remapCallTree($this->mStack)));
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}
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function remapCallTree($stack) {
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if (count($stack) < 2) {
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return $stack;
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}
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$outputs = array ();
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for ($max = count($stack) - 1; $max > 0;) {
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/* Find all items under this entry */
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$level = $stack[$max][1];
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$working = array ();
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for ($i = $max -1; $i >= 0; $i --) {
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if ($stack[$i][1] > $level) {
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$working[] = $stack[$i];
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} else {
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break;
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}
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}
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$working = $this->remapCallTree(array_reverse($working));
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$output = array ();
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foreach ($working as $item) {
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array_push($output, $item);
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}
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array_unshift($output, $stack[$max]);
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$max = $i;
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array_unshift($outputs, $output);
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}
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$final = array ();
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foreach ($outputs as $output) {
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foreach ($output as $item) {
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$final[] = $item;
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}
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}
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return $final;
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}
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function getCallTreeLine($entry) {
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list ($fname, $level, $start, $x, $end) = $entry;
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$delta = $end - $start;
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$space = str_repeat(' ', $level);
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# The ugly double sprintf is to work around a PHP bug,
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# which has been fixed in recent releases.
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return sprintf( "%10s %s %s\n",
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trim( sprintf( "%7.3f", $delta * 1000.0 ) ),
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$space, $fname );
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}
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function getTime() {
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return microtime(true);
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#return $this->getUserTime();
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}
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function getUserTime() {
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$ru = getrusage();
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return $ru['ru_utime.tv_sec'].' '.$ru['ru_utime.tv_usec'] / 1e6;
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}
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function getFunctionReport() {
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$width = 140;
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$nameWidth = $width - 65;
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$format = "%-{$nameWidth}s %6d %13.3f %13.3f %13.3f%% %9d (%13.3f -%13.3f) [%d]\n";
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$titleFormat = "%-{$nameWidth}s %6s %13s %13s %13s %9s\n";
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$prof = "\nProfiling data\n";
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$prof .= sprintf($titleFormat, 'Name', 'Calls', 'Total', 'Each', '%', 'Mem');
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$this->mCollated = array ();
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$this->mCalls = array ();
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$this->mMemory = array ();
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# Estimate profiling overhead
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$profileCount = count($this->mStack);
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wfProfileIn('-overhead-total');
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for ($i = 0; $i < $profileCount; $i ++) {
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wfProfileIn('-overhead-internal');
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wfProfileOut('-overhead-internal');
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}
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wfProfileOut('-overhead-total');
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# First, subtract the overhead!
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foreach ($this->mStack as $entry) {
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$fname = $entry[0];
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$thislevel = $entry[1];
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$start = $entry[2];
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$end = $entry[4];
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$elapsed = $end - $start;
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$memory = $entry[5] - $entry[3];
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if ($fname == '-overhead-total') {
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$overheadTotal[] = $elapsed;
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$overheadMemory[] = $memory;
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}
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elseif ($fname == '-overhead-internal') {
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$overheadInternal[] = $elapsed;
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}
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}
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$overheadTotal = array_sum($overheadTotal) / count($overheadInternal);
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$overheadMemory = array_sum($overheadMemory) / count($overheadInternal);
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$overheadInternal = array_sum($overheadInternal) / count($overheadInternal);
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# Collate
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foreach ($this->mStack as $index => $entry) {
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$fname = $entry[0];
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$thislevel = $entry[1];
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$start = $entry[2];
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$end = $entry[4];
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$elapsed = $end - $start;
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$memory = $entry[5] - $entry[3];
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$subcalls = $this->calltreeCount($this->mStack, $index);
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if (!preg_match('/^-overhead/', $fname)) {
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# Adjust for profiling overhead (except special values with elapsed=0
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if ( $elapsed ) {
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$elapsed -= $overheadInternal;
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$elapsed -= ($subcalls * $overheadTotal);
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$memory -= ($subcalls * $overheadMemory);
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}
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}
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if (!array_key_exists($fname, $this->mCollated)) {
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$this->mCollated[$fname] = 0;
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$this->mCalls[$fname] = 0;
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$this->mMemory[$fname] = 0;
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$this->mMin[$fname] = 1 << 24;
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$this->mMax[$fname] = 0;
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$this->mOverhead[$fname] = 0;
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}
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$this->mCollated[$fname] += $elapsed;
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$this->mCalls[$fname]++;
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$this->mMemory[$fname] += $memory;
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$this->mMin[$fname] = min($this->mMin[$fname], $elapsed);
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$this->mMax[$fname] = max($this->mMax[$fname], $elapsed);
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$this->mOverhead[$fname] += $subcalls;
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}
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$total = @ $this->mCollated['-total'];
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$this->mCalls['-overhead-total'] = $profileCount;
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# Output
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asort($this->mCollated, SORT_NUMERIC);
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foreach ($this->mCollated as $fname => $elapsed) {
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$calls = $this->mCalls[$fname];
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$percent = $total ? 100. * $elapsed / $total : 0;
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$memory = $this->mMemory[$fname];
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$prof .= sprintf($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]);
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global $wgProfileToDatabase;
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if ($wgProfileToDatabase) {
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Profiler :: logToDB($fname, (float) ($elapsed * 1000), $calls);
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}
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}
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$prof .= "\nTotal: $total\n\n";
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return $prof;
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}
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/**
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* Counts the number of profiled function calls sitting under
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* the given point in the call graph. Not the most efficient algo.
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*
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* @param $stack Array:
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* @param $start Integer:
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* @return Integer
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* @private
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*/
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function calltreeCount(& $stack, $start) {
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$level = $stack[$start][1];
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$count = 0;
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for ($i = $start -1; $i >= 0 && $stack[$i][1] > $level; $i --) {
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$count ++;
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}
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return $count;
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}
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/**
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* @static
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*/
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function logToDB($name, $timeSum, $eventCount) {
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# Warning: $wguname is a live patch, it should be moved to Setup.php
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global $wguname, $wgProfilePerHost;
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$fname = 'Profiler::logToDB';
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$dbw = & wfGetDB(DB_MASTER);
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if (!is_object($dbw))
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return false;
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$errorState = $dbw->ignoreErrors( true );
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$profiling = $dbw->tableName('profiling');
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$name = substr($name, 0, 255);
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$encname = $dbw->strencode($name);
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if ($wgProfilePerHost) {
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$pfhost = $wguname['nodename'];
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} else {
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$pfhost = '';
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}
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$sql = "UPDATE $profiling "."SET pf_count=pf_count+{$eventCount}, "."pf_time=pf_time + {$timeSum} ".
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"WHERE pf_name='{$encname}' AND pf_server='{$pfhost}'";
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$dbw->query($sql);
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$rc = $dbw->affectedRows();
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if ($rc == 0) {
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$dbw->insert('profiling', array ('pf_name' => $name, 'pf_count' => $eventCount,
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'pf_time' => $timeSum, 'pf_server' => $pfhost ), $fname, array ('IGNORE'));
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}
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// When we upgrade to mysql 4.1, the insert+update
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// can be merged into just a insert with this construct added:
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// "ON DUPLICATE KEY UPDATE ".
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// "pf_count=pf_count + VALUES(pf_count), ".
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// "pf_time=pf_time + VALUES(pf_time)";
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$dbw->ignoreErrors( $errorState );
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}
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/**
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* Get the function name of the current profiling section
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*/
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function getCurrentSection() {
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$elt = end($this->mWorkStack);
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return $elt[0];
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}
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}
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?>
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