'Get the processor counters for calculating node utilization.'

def _get_node_utilization_processor_counters(self, node_name):

    processor_instance_uuids = self.zapi_client.get_performance_instance_uuids('processor', node_name)
    processor_counter_names = ['domain_busy', 'processor_elapsed_time']
    processor_counters = self.zapi_client.get_performance_counters('processor', processor_instance_uuids, processor_counter_names)
    for counter in processor_counters:
        if ('domain_busy' in counter):
            self._expand_performance_array('processor', 'domain_busy', counter)
    return processor_counters
