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#! /usr/bin/python
from __future__ import print_function
import subprocess
import sys
import time
if (len(sys.argv)) != 2:
print("usage:", sys.argv[0], "<pid>")
pid = sys.argv[1]
peak_rss = 0
while True:
# Use -p because --pid doesn't work on Mac.
# Also, have to split the output because --no-headers doesn't work on
# Mac.
cmd = ["ps", "-o", "rss", "-p", pid];
heading, rss = (subprocess.check_output(cmd).rstrip()).split('\n');
rss = int(rss)
print("{0:.2f} MiB".format(rss / 1024.0))
if (rss > peak_rss):
peak_rss = rss
print("\npeak: {0:.2f} MiB".format(peak_rss / 1024.0))
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