@staticmethod
def cpu_node_count(node):
    """Return count of numa nodes.

        :param node: Targeted node.
        :type node: dict
        :returns: Count of numa nodes.
        :rtype: int
        :raises RuntimeError: If node cpuinfo is not available.
        """
    cpu_info = node.get('cpuinfo')
    if cpu_info is not None:
        return node['cpuinfo'][-1][3] + 1
    else:
        raise RuntimeError('Node cpuinfo not available.')
