nimbus-eth2/scripts/slowlogs.py

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2021-03-30 07:39:16 +00:00
#!/usr/bin/env python3
# Print logs that have gaps between them larger than the threshold - useful for
# finding slowdowns in the code where the thread is busy for long periods of
# time
# usage:
# tail -F logfile | python slowlogs.py 0.75
import sys, re
from datetime import datetime
THRESHOLD = 0.75
if len(sys.argv) > 0:
THRESHOLD = float(sys.argv[1])
last = None
prevline = None
dt = re.compile(r"([0-9-]+ [0-9:.]+)")
for line in sys.stdin:
match = dt.search(line)
if match:
current = datetime.strptime(match.group(1), "%Y-%m-%d %H:%M:%S.%f")
if last != None and (current - last).total_seconds() > THRESHOLD:
print((current - last).total_seconds())
print(prevline, end="")
print(line)
last = current
prevline = line