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#!/usr/bin/env python
# Copyright (c) 2015 Google, Inc.
# Copyright (c) 2015 Linaro, Ltd.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from this
# software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from __future__ import print_function
import csv
import datetime
import sys
import time
dict = {'ping': '2', 'transfer': '3', 'sink': '4'}
verbose = 1
def abort():
sys.exit(1)
def usage():
print('Usage: looptest TEST SIZE ITERATIONS PATH\n\n'
' Run TEST for a number of ITERATIONS with operation data SIZE bytes\n'
' TEST may be \'ping\' \'transfer\' or \'sink\'\n'
' SIZE indicates the size of transfer <= greybus max payload bytes\n'
' ITERATIONS indicates the number of times to execute TEST at SIZE bytes\n'
' Note if ITERATIONS is set to zero then this utility will\n'
' initiate an infinite (non terminating) test and exit\n'
' without logging any metrics data\n'
' PATH indicates the sysfs path for the loopback greybus entries e.g.\n'
' /sys/bus/greybus/devices/endo0:1:1:1:1/\n'
'Examples:\n'
' looptest transfer 128 10000\n'
' looptest ping 0 128\n'
' looptest sink 2030 32768\n'
.format(sys.argv[0]), file=sys.stderr)
abort()
def read_sysfs_int(path):
try:
f = open(path, "r");
val = f.read();
f.close()
return int(val)
except IOError as e:
print("I/O error({0}): {1}".format(e.errno, e.strerror))
print("Invalid path %s" % path)
def write_sysfs_val(path, val):
try:
f = open(path, "r+")
f.write(val)
f.close()
except IOError as e:
print("I/O error({0}): {1}".format(e.errno, e.strerror))
print("Invalid path %s" % path)
def log_csv(test_name, size, iteration_max, sys_pfx):
# file name will test_name_size_iteration_max.csv
# every time the same test with the same parameters is run we will then
# append to the same CSV with datestamp - representing each test dataset
fname = test_name + '_' + size + '_' + str(iteration_max) + '.csv'
try:
# gather data set
date = str(datetime.datetime.now())
error = read_sysfs_int(sys_pfx + 'error')
request_min = read_sysfs_int(sys_pfx + 'requests_per_second_min')
request_max = read_sysfs_int(sys_pfx + 'requests_per_second_max')
request_avg = read_sysfs_int(sys_pfx + 'requests_per_second_avg')
latency_min = read_sysfs_int(sys_pfx + 'latency_min')
latency_max = read_sysfs_int(sys_pfx + 'latency_max')
latency_avg = read_sysfs_int(sys_pfx + 'latency_avg')
throughput_min = read_sysfs_int(sys_pfx + 'throughput_min')
throughput_max = read_sysfs_int(sys_pfx + 'throughput_max')
throughput_avg = read_sysfs_int(sys_pfx + 'throughput_avg')
# derive jitter
request_jitter = request_max - request_min
latency_jitter = latency_max - latency_min
throughput_jitter = throughput_max - throughput_min
# append data set to file
with open(fname, 'a') as csvf:
row = csv.writer(csvf, delimiter=",", quotechar="'",
quoting=csv.QUOTE_MINIMAL)
row.writerow([date, test_name, size, iteration_max, error,
request_min, request_max, request_avg, request_jitter,
latency_min, latency_max, latency_avg, latency_jitter,
throughput_min, throughput_max, throughput_avg, throughput_jitter])
except IOError as e:
print("I/O error({0}): {1}".format(e.errno, e.strerror))
def loopback_run(test_name, size, iteration_max, sys_pfx):
test_id = dict[test_name]
try:
# Terminate any currently running test
write_sysfs_val(sys_pfx + 'type', '0')
# Set parameter for no wait between messages
write_sysfs_val(sys_pfx + 'ms_wait', '0')
# Set operation size
write_sysfs_val(sys_pfx + 'size', size)
# Set iterations
write_sysfs_val(sys_pfx + 'iteration_max', str(iteration_max))
# Initiate by setting loopback operation type
write_sysfs_val(sys_pfx + 'type', test_id)
time.sleep(1)
if iteration_max == 0:
print ("Infinite test initiated CSV won't be logged\n")
return
previous = 0
err = 0
while True:
# get current count bail out if it hasn't changed
iteration_count = read_sysfs_int(sys_pfx + 'iteration_count')
if previous == iteration_count:
err = 1
break
elif iteration_count == iteration_max:
break
previous = iteration_count
if verbose:
print('%02d%% complete %d of %d ' %
(100 * iteration_count / iteration_max,
iteration_count, iteration_max))
time.sleep(1)
if err:
print ('\nError executing test\n')
else:
log_csv(test_name, size, iteration_max, sys_pfx)
except ValueError as ve:
print("Error: %s " % format(e.strerror), file=sys.stderr)
abort()
def main():
if len(sys.argv) < 5:
usage()
if sys.argv[1] in dict.keys():
loopback_run(sys.argv[1], sys.argv[2], int(sys.argv[3]), sys.argv[4])
else:
usage()
if __name__ == '__main__':
main()
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