1#!/usr/bin/env python 2 3# Copyright (c) 2015 Google, Inc. 4# Copyright (c) 2015 Linaro, Ltd. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions are met: 9# 1. Redistributions of source code must retain the above copyright notice, 10# this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright notice, 12# this list of conditions and the following disclaimer in the documentation 13# and/or other materials provided with the distribution. 14# 3. Neither the name of the copyright holder nor the names of its 15# contributors may be used to endorse or promote products derived from this 16# software without specific prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 22# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 25# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30from __future__ import print_function 31import csv 32import datetime 33import sys 34import time 35 36dict = {'ping': '2', 'transfer': '3', 'sink': '4'} 37verbose = 1 38 39def abort(): 40 sys.exit(1) 41 42def usage(): 43 print('Usage: looptest TEST SIZE ITERATIONS PATH\n\n' 44 ' Run TEST for a number of ITERATIONS with operation data SIZE bytes\n' 45 ' TEST may be \'ping\' \'transfer\' or \'sink\'\n' 46 ' SIZE indicates the size of transfer <= greybus max payload bytes\n' 47 ' ITERATIONS indicates the number of times to execute TEST at SIZE bytes\n' 48 ' Note if ITERATIONS is set to zero then this utility will\n' 49 ' initiate an infinite (non terminating) test and exit\n' 50 ' without logging any metrics data\n' 51 ' PATH indicates the sysfs path for the loopback greybus entries e.g.\n' 52 ' /sys/bus/greybus/devices/endo0:1:1:1:1/\n' 53 'Examples:\n' 54 ' looptest transfer 128 10000\n' 55 ' looptest ping 0 128\n' 56 ' looptest sink 2030 32768\n' 57 .format(sys.argv[0]), file=sys.stderr) 58 59 abort() 60 61def read_sysfs_int(path): 62 try: 63 f = open(path, "r"); 64 val = f.read(); 65 f.close() 66 return int(val) 67 except IOError as e: 68 print("I/O error({0}): {1}".format(e.errno, e.strerror)) 69 print("Invalid path %s" % path) 70 71def write_sysfs_val(path, val): 72 try: 73 f = open(path, "r+") 74 f.write(val) 75 f.close() 76 except IOError as e: 77 print("I/O error({0}): {1}".format(e.errno, e.strerror)) 78 print("Invalid path %s" % path) 79 80def log_csv(test_name, size, iteration_max, sys_pfx): 81 # file name will test_name_size_iteration_max.csv 82 # every time the same test with the same parameters is run we will then 83 # append to the same CSV with datestamp - representing each test dataset 84 fname = test_name + '_' + size + '_' + str(iteration_max) + '.csv' 85 86 try: 87 # gather data set 88 date = str(datetime.datetime.now()) 89 error = read_sysfs_int(sys_pfx + 'error') 90 request_min = read_sysfs_int(sys_pfx + 'requests_per_second_min') 91 request_max = read_sysfs_int(sys_pfx + 'requests_per_second_max') 92 request_avg = read_sysfs_int(sys_pfx + 'requests_per_second_avg') 93 latency_min = read_sysfs_int(sys_pfx + 'latency_min') 94 latency_max = read_sysfs_int(sys_pfx + 'latency_max') 95 latency_avg = read_sysfs_int(sys_pfx + 'latency_avg') 96 throughput_min = read_sysfs_int(sys_pfx + 'throughput_min') 97 throughput_max = read_sysfs_int(sys_pfx + 'throughput_max') 98 throughput_avg = read_sysfs_int(sys_pfx + 'throughput_avg') 99 100 # derive jitter 101 request_jitter = request_max - request_min 102 latency_jitter = latency_max - latency_min 103 throughput_jitter = throughput_max - throughput_min 104 105 # append data set to file 106 with open(fname, 'a') as csvf: 107 row = csv.writer(csvf, delimiter=",", quotechar="'", 108 quoting=csv.QUOTE_MINIMAL) 109 row.writerow([date, test_name, size, iteration_max, error, 110 request_min, request_max, request_avg, request_jitter, 111 latency_min, latency_max, latency_avg, latency_jitter, 112 throughput_min, throughput_max, throughput_avg, throughput_jitter]) 113 except IOError as e: 114 print("I/O error({0}): {1}".format(e.errno, e.strerror)) 115 116def loopback_run(test_name, size, iteration_max, sys_pfx): 117 test_id = dict[test_name] 118 try: 119 # Terminate any currently running test 120 write_sysfs_val(sys_pfx + 'type', '0') 121 # Set parameter for no wait between messages 122 write_sysfs_val(sys_pfx + 'ms_wait', '0') 123 # Set operation size 124 write_sysfs_val(sys_pfx + 'size', size) 125 # Set iterations 126 write_sysfs_val(sys_pfx + 'iteration_max', str(iteration_max)) 127 # Initiate by setting loopback operation type 128 write_sysfs_val(sys_pfx + 'type', test_id) 129 time.sleep(1) 130 131 if iteration_max == 0: 132 print ("Infinite test initiated CSV won't be logged\n") 133 return 134 135 previous = 0 136 err = 0 137 while True: 138 # get current count bail out if it hasn't changed 139 iteration_count = read_sysfs_int(sys_pfx + 'iteration_count') 140 if previous == iteration_count: 141 err = 1 142 break 143 elif iteration_count == iteration_max: 144 break 145 previous = iteration_count 146 if verbose: 147 print('%02d%% complete %d of %d ' % 148 (100 * iteration_count / iteration_max, 149 iteration_count, iteration_max)) 150 time.sleep(1) 151 if err: 152 print ('\nError executing test\n') 153 else: 154 log_csv(test_name, size, iteration_max, sys_pfx) 155 except ValueError as ve: 156 print("Error: %s " % format(e.strerror), file=sys.stderr) 157 abort() 158 159def main(): 160 if len(sys.argv) < 5: 161 usage() 162 163 if sys.argv[1] in dict.keys(): 164 loopback_run(sys.argv[1], sys.argv[2], int(sys.argv[3]), sys.argv[4]) 165 else: 166 usage() 167if __name__ == '__main__': 168 main() 169