protected function detectProcessorNumberByGrep()
{
if (Utils::findBin('grep') && file_exists('/proc/cpuinfo')) {
$process = new Process('grep -c ^processor /proc/cpuinfo 2>/dev/null');
$process->run();
$this->processorNumber = intval($process->getOutput());
return $this->processorNumber;
}
return null;
}