| """ |
| Run iostat with a default interval of 1 second. |
| """ |
| import time, os, subprocess |
| from autotest_lib.client.bin import profiler |
| from autotest_lib.client.common_lib import utils, error |
| |
| |
| class iostat(profiler.profiler): |
| version = 2 |
| |
| def initialize(self, interval = 1, options = ''): |
| # Usage: iostat [ options... ] [ <interval> [ <count> ] ] |
| # e.g, iostat -tmx 2 |
| self.interval = interval |
| self.options = options |
| |
| |
| 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 |
| |
| |
| 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) |
| |
| |
| def report(self, test): |
| return None |
