| from math import sqrt |
| |
| class Stats: |
| def __init__(self): |
| self.count = 0 |
| self.start = 0 |
| self.delta = 0 |
| self.min = 0 |
| self.max = 0 |
| self.delta_squares = 0 |
| |
| def update(self, packets = 0, t = 0, usecs = False): |
| self.count += packets |
| if usecs == False: |
| t *= 1000000 ##convert to usecs |
| if self.start == 0: |
| self.start = t |
| self.delta += t |
| self.delta_squares += t*t |
| if self.min == 0 or t < self.min: |
| self.min = t |
| if self.max == 0 or t > self.max: |
| self.max = t |
| |
| def __repr__(self): |
| if self.count == 0: |
| self.count = 1 |
| mean = self.delta/self.count |
| mean_square = mean*mean |
| delta_square_mean = self.delta_squares/self.count |
| std_mean = sqrt(delta_square_mean - mean_square) |
| r = 'Avg %.3f usecs, Std deviation %.3f usecs, Min %.3f, Max %.3f for %d packets\n' %( |
| mean, std_mean, self.min, self.max, self.count) |
| return r |
| |