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refactor around deltas, add configurable decay coefficient and smarter halting

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xenofem 2021-11-23 01:39:11 -05:00
parent 105839d8cf
commit 93e17e14b8
1 changed files with 26 additions and 9 deletions
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@ -12,11 +12,21 @@ parser = argparse.ArgumentParser(description='Display progress and time estimate
parser.add_argument('-f', '--final', type=str, help='Expected final size/value at completion, optionally with a K/M/G/T suffix')
parser.add_argument('-i', '--interval', type=int, default=10, help='Interval in seconds between samples (default 10)')
parser.add_argument('-w', '--window', type=int, default=100, help='Number of samples to keep for the sliding window (default 100)')
parser.add_argument('-d', '--decay', type=float, default=1, help='Decay coefficient for older samples (default 1). Must be between 0 and 1 inclusive. The lower this is, the more responsive/swingy the estimate will be.')
tracker_types = parser.add_mutually_exclusive_group(required=True)
tracker_types.add_argument('-p', '--path', type=str, help='Track total disk usage of a given path')
tracker_types.add_argument('-c', '--command', type=str, help='Track value returned by a shell command; this should return a single number, optionally with a K/M/G/T suffix')
args = parser.parse_args()
if args.interval < 1:
print('interval must be at least 1', file=sys.stderr)
exit(1)
if args.window < 1:
print('window size must be at least 1', file=sys.stderr)
exit(1)
if args.decay < 0 or args.decay > 1:
print('decay coefficient must be between 0 and 1', file=sys.stderr)
exit(1)
def parse_value(v):
suffix = v[-1].upper()
@ -57,19 +67,26 @@ if args.final:
else:
final = None
samples = [current_val()]
deltas = []
current = current_val()
while True:
time.sleep(args.interval)
current = current_val()
new = current_val()
samples.append(current)
if len(samples) < 2:
continue
if len(samples) > args.window:
samples = samples[-args.window:]
deltas.append(new - current)
current = new
if len(deltas) > args.window:
deltas = deltas[-args.window:]
rate = (current - samples[0])/((len(samples)-1)*args.interval)
total = 0
divisor = 0
coeff = 1
for d in deltas[::-1]:
total += coeff*d
divisor += coeff
coeff *= args.decay
rate = total/(divisor*args.interval)
print('\033[2K\r', end='')
print('{} - {}/s'.format(display_value(current), display_value(rate)), end='')
@ -86,6 +103,6 @@ while True:
), end='')
sys.stdout.flush()
if final and current >= final:
if final and current >= final and all(d == 0 for d in deltas[-10:]):
print()
break