code: def do_health_checks(self, list_of_ips):
          
          # Calculate a decent overall timeout time for a ping attempt: 3/4th of
          # the monitoring interval. That way, we know we're done with this ping
          # attempt before the next monitoring attempt is started.
          ping_timeout = self.get_monitor_interval() * 0.75
  
          # Calculate a decent number of retries. For very short intervals we
          # shouldn't have any retries, for very long ones, we should have
          # several ones. Converting the timeout to an integer gives us what we
          # want: For timeouts less than 1 we have no retry at all.
          num_retries = int(ping_timeout)
  
          try:
              self.ping_count += len(list_of_ips)
              responses, no_responses = multiping.multi_ping(
                                          list_of_ips, ping_timeout, num_retries)
              self.update_stats(responses, no_responses)
  
          except Exception as e:
              logging.error("Exception while trying to monitor servers: %s" %
                            str(e))
              # Need to assume all IPs failed
              no_responses = list_of_ips
  
          return no_responses, []
docs: Perform a health check on a list of IP addresses, using ICMPecho.
  
          Return tuple with list of failed IPs and questionable IPs.