--- /dev/null
+<?php
+/**
+ * This file is only included if profiling is enabled
+ */
+
+$wgProfiling = true;
+
+/**
+ * @param $functioname name of the function we will profile
+ */
+function wfProfileIn($functionname) {
+ global $wgProfiler;
+ $wgProfiler->profileIn($functionname);
+}
+
+/**
+ * @param $functioname name of the function we have profiled
+ */
+function wfProfileOut($functionname = 'missing') {
+ global $wgProfiler;
+ $wgProfiler->profileOut($functionname);
+}
+
+function wfGetProfilingOutput($start, $elapsed) {
+ global $wgProfiler;
+ return $wgProfiler->getOutput($start, $elapsed);
+}
+
+function wfProfileClose() {
+ global $wgProfiler;
+ $wgProfiler->close();
+}
+
+if (!function_exists('memory_get_usage')) {
+ # Old PHP or --enable-memory-limit not compiled in
+ function memory_get_usage() {
+ return 0;
+ }
+}
+
+/**
+ * @todo document
+ * @addtogroup Profiler
+ */
+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 {
+ $this->profileIn( '-total' );
+ }
+ }
+
+ function profileIn($functionname) {
+ global $wgDebugFunctionEntry;
+ if ($wgDebugFunctionEntry && function_exists('wfDebug')) {
+ wfDebug(str_repeat(' ', count($this->mWorkStack)).'Entering '.$functionname."\n");
+ }
+ $this->mWorkStack[] = array($functionname, count( $this->mWorkStack ), $this->getTime(), memory_get_usage());
+ }
+
+ function profileOut($functionname) {
+ $memory = memory_get_usage();
+ $time = $this->getTime();
+
+ global $wgDebugFunctionEntry;
+
+ if ($wgDebugFunctionEntry && function_exists('wfDebug')) {
+ wfDebug(str_repeat(' ', count($this->mWorkStack) - 1).'Exiting '.$functionname."\n");
+ }
+
+ $bit = array_pop($this->mWorkStack);
+
+ if (!$bit) {
+ wfDebug("Profiling error, !\$bit: $functionname\n");
+ } else {
+ //if ($wgDebugProfiling) {
+ if ($functionname == 'close') {
+ $message = "Profile section ended by close(): {$bit[0]}";
+ wfDebug( "$message\n" );
+ $this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
+ }
+ elseif ($bit[0] != $functionname) {
+ $message = "Profiling error: in({$bit[0]}), out($functionname)";
+ wfDebug( "$message\n" );
+ $this->mStack[] = array( $message, 0, '0 0', 0, '0 0', 0 );
+ }
+ //}
+ $bit[] = $time;
+ $bit[] = $memory;
+ $this->mStack[] = $bit;
+ }
+ }
+
+ function close() {
+ while (count($this->mWorkStack)) {
+ $this->profileOut('close');
+ }
+ }
+
+ function getOutput() {
+ global $wgDebugFunctionEntry;
+ $wgDebugFunctionEntry = false;
+
+ if (!count($this->mStack) && !count($this->mCollated)) {
+ return "No profiling output\n";
+ }
+ $this->close();
+
+ global $wgProfileCallTree;
+ if ($wgProfileCallTree) {
+ return $this->getCallTree();
+ } else {
+ return $this->getFunctionReport();
+ }
+ }
+
+ function getCallTree($start = 0) {
+ return implode('', array_map(array (& $this, 'getCallTreeLine'), $this->remapCallTree($this->mStack)));
+ }
+
+ 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 $final;
+ }
+
+ function getCallTreeLine($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;
+ }
+
+ function getFunctionReport() {
+ $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; $i ++) {
+ wfProfileIn('-overhead-internal');
+ wfProfileOut('-overhead-internal');
+ }
+ wfProfileOut('-overhead-total');
+
+ # First, subtract the overhead!
+ foreach ($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]);
+
+ global $wgProfileToDatabase;
+ if ($wgProfileToDatabase) {
+ Profiler :: logToDB($fname, (float) ($elapsed * 1000), $calls);
+ }
+ }
+ $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 $count;
+ }
+
+ /**
+ * @static
+ */
+ function logToDB($name, $timeSum, $eventCount) {
+ # Do not log anything if database is readonly (bug 5375)
+ if( wfReadOnly() ) { return; }
+
+ # Warning: $wguname is a live patch, it should be moved to Setup.php
+ global $wguname, $wgProfilePerHost;
+
+ $fname = 'Profiler::logToDB';
+ $dbw = wfGetDB(DB_MASTER);
+ if (!is_object($dbw))
+ return false;
+ $errorState = $dbw->ignoreErrors( true );
+ $profiling = $dbw->tableName('profiling');
+
+ $name = substr($name, 0, 255);
+ $encname = $dbw->strencode($name);
+
+ if ($wgProfilePerHost) {
+ $pfhost = $wguname['nodename'];
+ } else {
+ $pfhost = '';
+ }
+
+ $sql = "UPDATE $profiling "."SET pf_count=pf_count+{$eventCount}, "."pf_time=pf_time + {$timeSum} ".
+ "WHERE pf_name='{$encname}' AND pf_server='{$pfhost}'";
+ $dbw->query($sql);
+
+ $rc = $dbw->affectedRows();
+ if ($rc == 0) {
+ $dbw->insert('profiling', array ('pf_name' => $name, 'pf_count' => $eventCount,
+ 'pf_time' => $timeSum, 'pf_server' => $pfhost ), $fname, 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];
+ }
+
+ 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;
+ }
+
+}
+
+
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