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##############################################################################
# Copyright (c) 2015 EMC and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import sys
import getopt
import subprocess
import json
from threading import Thread
class Usage(Exception):
def __init__(self, msg):
self.msg = msg
class FIOInvoker(object):
def __init__(self):
self.event_listeners = set()
def register(self, event_listener):
self.event_listeners.add(event_listener)
def unregister(self, event_listener):
self.event_listeners.discard(event_listener)
def stdout_handler(self):
self.json_body = ""
for line in iter(self.fio_process.stdout.readline, b''):
self.json_body += line
try:
json_metric = json.loads(self.json_body)
self.json_body = ""
for event_listener in self.event_listeners:
event_listener(json_metric)
except:
if self.json_body.startswith("fio"):
self.json_body = ""
pass
self.fio_process.stdout.close()
def stderr_handler(self):
for line in iter(self.fio_process.stderr.readline, b''):
print line
self.fio_process.stderr.close()
def execute(self, args=[]):
self.fio_process = subprocess.Popen(['fio']+args,
universal_newlines=True, stdout=subprocess.PIPE,
stderr=subprocess.PIPE);
t = Thread(target=self.stdout_handler, args=())
t.daemon = False
t.start()
t = Thread(target=self.stderr_handler, args=())
t.daemon = False
t.start()
# fio --rw=randread --size=32m --directory=/tmp/fio-testing/data --ioengine=libaio --iodepth=2 --direct=1 --invalidate=1 --numjobs=4 --name=random-read
def event(json_metric):
print json_metric
def main(argv=None):
if argv is None:
argv = sys.argv
try:
try:
opts = getopt.getopt(argv[1:], "h", ["help"])
except getopt.error, msg:
raise Usage(msg)
except Usage, err:
print >> sys.stderr, err.msg
print >> sys.stderr, "for help use --help"
return 2
for o in opts:
if o in ("-h", "--help"):
print __doc__
return 0
simple_args = ['--rw=randread', '--size=32m',
'--directory=.',
'--iodepth=2',
'--direct=1', '--invalidate=1', '--numjobs=4',
'--name=random-read', '--output-format=json',
'--status-interval=3',
'--time_based', '--runtime=6']
invoker = FIOInvoker()
invoker.register(event)
invoker.execute(simple_args)
if __name__ == "__main__":
sys.exit(main())
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