+class Latency(object):
+ """A class to hold latency data."""
+
+ def __init__(self, latency_list=None):
+ """Create a latency instance.
+
+ latency_list: aggregate all latency values from list if not None
+ """
+ self.min_usec = sys.maxsize
+ self.max_usec = 0
+ self.avg_usec = 0
+ self.hdrh = None
+ if latency_list:
+ for lat in latency_list:
+ if lat.available():
+ self.min_usec = min(self.min_usec, lat.min_usec)
+ self.max_usec = max(self.max_usec, lat.max_usec)
+ self.avg_usec += lat.avg_usec
+ # round to nearest usec
+ self.avg_usec = int(round(float(self.avg_usec) / len(latency_list)))
+
+ def available(self):
+ """Return True if latency information is available."""
+ return self.min_usec != sys.maxsize