/**
* Serialize profiling data and send to a profiling data aggregator.
*
* Individual entries are represented as arrays and then encoded using
* MessagePack, an efficient binary data-interchange format. Encoded
* entries are accumulated into a buffer and sent in batch via UDP to the
* profiling data aggregator.
*/
public function logData()
{
global $wgUDPProfilerHost, $wgUDPProfilerPort;
$this->close();
if (!function_exists('socket_create')) {
return;
// avoid fatal
}
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_connect($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, $bufferLength, 0);
}
}
/**
* Verify that values are serialized correctly.
* @covers MWMessagePack::pack
* @dataProvider providePacks
*/
public function testPack($type, $value, $expected)
{
$actual = bin2hex(MWMessagePack::pack($value));
$this->assertEquals($expected, $actual, $type);
}