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#!/usr/bin/env python3
#
# sgunmap-test.py
#
# Basic performance testing using fio's sg ioengine
#
# USAGE
# sgunmap-perf.py char-device block-device fio-executable
#
# EXAMPLE
# t/sgunmap-perf.py /dev/sg1 /dev/sdb ./fio
#
# REQUIREMENTS
# Python 2.6+
#
#
from __future__ import absolute_import
from __future__ import print_function
import sys
import json
import argparse
import subprocess
from six.moves import range
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument('cdev',
help='character device target (e.g., /dev/sg0)')
parser.add_argument('bdev',
help='block device target (e.g., /dev/sda)')
parser.add_argument('fioc',
help='path to candidate fio executable (e.g., ./fio)')
parser.add_argument('fior',
help='path to reference fio executable (e.g., ./fio)')
args = parser.parse_args()
return args
def fulldevice(fio, dev, ioengine='psync', rw='trim', bs='1M'):
parameters = ["--name=test",
"--output-format=json",
"--random_generator=lfsr",
"--bs={0}".format(bs),
"--rw={0}".format(rw),
"--ioengine={0}".format(ioengine),
"--filename={0}".format(dev)]
output = subprocess.check_output([fio] + parameters)
jsondata = json.loads(output)
jobdata = jsondata['jobs'][0]
return jobdata
def runtest(fio, dev, rw, qd, batch, bs='512', runtime='30s'):
parameters = ["--name=test",
"--random_generator=tausworthe64",
"--time_based",
"--runtime={0}".format(runtime),
"--output-format=json",
"--ioengine=sg",
"--blocksize={0}".format(bs),
"--rw={0}".format(rw),
"--filename={0}".format(dev),
"--iodepth={0}".format(qd),
"--iodepth_batch={0}".format(batch)]
output = subprocess.check_output([fio] + parameters)
jsondata = json.loads(output)
jobdata = jsondata['jobs'][0]
# print(parameters)
return jobdata
def runtests(fio, dev, qd, batch, rw, bs='512', trials=5):
iops = []
for x in range(trials):
jd = runtest(fio, dev, rw, qd, batch, bs=bs)
total = jd['read']['iops'] + jd['write']['iops'] + jd['trim']['iops']
# print(total)
iops.extend([total])
return iops, (sum(iops) / trials)
if __name__ == '__main__':
args = parse_args()
print("Trimming full device {0}".format(args.cdev))
fulldevice(args.fior, args.cdev, ioengine='sg')
print("Running rand read tests on {0}"
" with fio candidate build {1}".format(args.cdev, args.fioc))
randread, rrmean = runtests(args.fioc, args.cdev, 16, 1, 'randread',
trials=5)
print("IOPS mean {0}, trials {1}".format(rrmean, randread))
print("Running rand read tests on {0}"
" with fio reference build {1}".format(args.cdev, args.fior))
randread, rrmean = runtests(args.fior, args.cdev, 16, 1, 'randread',
trials=5)
print("IOPS mean {0}, trials {1}".format(rrmean, randread))
print("Running rand write tests on {0}"
" with fio candidate build {1}".format(args.cdev, args.fioc))
randwrite, rwmean = runtests(args.fioc, args.cdev, 16, 1, 'randwrite',
trials=5)
print("IOPS mean {0}, trials {1}".format(rwmean, randwrite))
print("Running rand write tests on {0}"
" with fio reference build {1}".format(args.cdev, args.fior))
randwrite, rwmean = runtests(args.fior, args.cdev, 16, 1, 'randwrite',
trials=5)
print("IOPS mean {0}, trials {1}".format(rwmean, randwrite))
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