private function _get_Win32_PerfFormattedData_PerfOS_Processor()
    {
        if ($this->_Win32_PerfFormattedData_PerfOS_Processor === null) {
            $cpubuffer = CommonFunctions::getWMI($this->_wmi, 'Win32_PerfFormattedData_PerfOS_Processor', array('Name', 'PercentProcessorTime'));
            $this->_Win32_PerfFormattedData_PerfOS_Processor = array();
            if ($cpubuffer) foreach ($cpubuffer as $cpu) {
                if (isset($cpu['Name']) && isset($cpu['PercentProcessorTime'])) {
                    $this->_Win32_PerfFormattedData_PerfOS_Processor['cpu'.$cpu['Name']] = $cpu['PercentProcessorTime'];
                }
            }
        }

        return $this->_Win32_PerfFormattedData_PerfOS_Processor;
    }