"""
Run iostat with a default interval of 1 second.
"""
import os
import subprocess
import time
from autotest.client import profiler
from autotest.client.shared import utils, error
[docs]class iostat(profiler.profiler):
version = 2
[docs] def initialize(self, interval=1, options='', **dargs):
# Usage: iostat [ options... ] [ <interval> [ <count> ] ]
# e.g, iostat -tmx 2
self.interval = interval
self.options = options
[docs] def start(self, test):
cmd = "/usr/bin/iostat %s %d" % (self.options, self.interval)
filename = "iostat." + time.strftime("%Y-%m-%d-%H-%M-%S")
logfile = open(os.path.join(test.profdir, filename), 'w')
p = subprocess.Popen(cmd, shell=True, stdout=logfile,
stderr=subprocess.STDOUT)
self.pid = p.pid
[docs] def stop(self, test):
try:
term_profiler = "kill -15 %d" % self.pid
# send SIGTERM to iostat and give it a 5-sec timeout
utils.system(term_profiler, timeout=5)
except error.CmdError: # probably times out
pass
# do a ps again to see if iostat is still there
ps_cmd = "ps -p %d | grep iostat" % self.pid
out = utils.system_output(ps_cmd, ignore_status=True)
if out != '':
kill_profiler = 'kill -9 %d' % self.pid
utils.system(kill_profiler, ignore_status=True)
[docs] def report(self, test):
return None