ProfilerMwprof.php

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<?php
class ProfilerMwprof extends Profiler {

    // Message types

    const TYPE_SINGLE = 1;
    const TYPE_RUNNING = 2;

    public function isPersistent() {
        return true;
    }

    public function profileIn( $inName ) {
        $this->mWorkStack[] = array( $inName, count( $this->mWorkStack ),
            $this->getTime(), $this->getTime( 'cpu' ) );
    }

    public function getFunctionReport() {
        return '';
    }

    public function profileOut( $outName ) {
        list( $inName, $inCount, $inWall, $inCpu ) = array_pop( $this->mWorkStack );

        // Check for unbalanced profileIn / profileOut calls.
        // Bad entries are logged but not sent.
        if ( $inName !== $outName ) {
            $this->debugGroup( 'ProfilerUnbalanced', json_encode( array( $inName, $outName ) ) );
            return;
        }

        $elapsedCpu = $this->getTime( 'cpu' ) - $inCpu;
        $elapsedWall = $this->getTime() - $inWall;
        $this->updateEntry( $outName, $elapsedCpu, $elapsedWall );
        $this->updateTrxProfiling( $outName, $elapsedWall );
    }

    public function updateEntry( $name, $elapsedCpu, $elapsedWall ) {
        // If this is the first measurement for this entry, store plain values.
        // Many profiled functions will only be called once per request.
        if ( !isset( $this->mCollated[$name] ) ) {
            $this->mCollated[$name] = array(
                'cpu'   => $elapsedCpu,
                'wall'  => $elapsedWall,
                'count' => 1,
            );
            return;
        }

        $entry = &$this->mCollated[$name];

        // If it's the second measurement, convert the plain values to
        // RunningStat instances, so we can push the incoming values on top.
        if ( $entry['count'] === 1 ) {
            $cpu = new RunningStat();
            $cpu->push( $entry['cpu'] );
            $entry['cpu'] = $cpu;

            $wall = new RunningStat();
            $wall->push( $entry['wall'] );
            $entry['wall'] = $wall;
        }

        $entry['count']++;
        $entry['cpu']->push( $elapsedCpu );
        $entry['wall']->push( $elapsedWall );
    }

    public function logData() {
        global $wgUDPProfilerHost, $wgUDPProfilerPort;

        $this->close();

        $sock = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP );
        socket_connect( $sock, $wgUDPProfilerHost, $wgUDPProfilerPort );
        $bufferLength = 0;
        $buffer = '';
        foreach ( $this->mCollated as $name => $entry ) {
            $count = $entry['count'];
            $cpu = $entry['cpu'];
            $wall = $entry['wall'];

            if ( $count === 1 ) {
                $data = array( self::TYPE_SINGLE, $name, $cpu, $wall );
            } else {
                $data = array( self::TYPE_RUNNING, $name, $count,
                    $cpu->m1, $cpu->m2, $cpu->min, $cpu->max,
                    $wall->m1, $wall->m2, $wall->min, $wall->max );
            }

            $encoded = MWMessagePack::pack( $data );
            $length = strlen( $encoded );

            // If adding this entry would cause the size of the buffer to
            // exceed the standard ethernet MTU size less the UDP header,
            // send all pending data and reset the buffer. Otherwise, continue
            // accumulating entries into the current buffer.
            if ( $length + $bufferLength > 1450 ) {
                socket_send( $sock, $buffer, $bufferLength, 0 );
                $buffer = '';
                $bufferLength = 0;
            }
            $buffer .= $encoded;
            $bufferLength += $length;
        }
        if ( $bufferLength !== 0 ) {
            socket_send( $sock, $buffer, $bufferLength, 0 );
        }
    }
}