--- /dev/null
+#!/usr/bin/python3
+
+# Copyright (c) 2021 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This module gets a bandwith limit together with other parameters, reads
+the iPerf3 configuration and sends the traffic. At the end, it measures
+the packet loss and latency.
+"""
+
+import argparse
+import json
+import sys
+import time
+import subprocess
+
+def simple_burst(args):
+ """Send traffic and measure throughput.
+
+ :param args: Named arguments from command line.
+ :type args: dict
+ """
+ if1_process = []
+ if1_results = []
+ cmd = None
+
+ if args.rate and args.frame_size:
+ iperf_frame_size = args.frame_size - 18
+ iperf_rate = float(args.rate)
+ bandwidth = \
+ int(args.frame_size) * float(iperf_rate) / args.instances
+
+ if args.warmup_time > 0:
+ try:
+ for i in range(0, args.instances):
+ cmd = u"exec sudo "
+ cmd += f"ip netns exec {args.namespace} " if args.namespace else u""
+ cmd += f"iperf3 "
+ cmd += f"--client {args.host} "
+ cmd += f"--bind {args.bind} "
+ if args.rate and args.frame_size:
+ cmd += f"--bandwidth {bandwidth} "
+ cmd += f"--length {iperf_frame_size} "
+ cmd += f"--port {5201 + i} "
+ cmd += f"--parallel {args.parallel} "
+ cmd += f"--time {args.warmup_time} "
+ if args.affinity:
+ cmd += f"--affinity {args.affinity} "
+ if args.udp:
+ cmd += f"--udp "
+ cmd += f"--zerocopy "
+ cmd += f"--json"
+ if1_process.append(
+ subprocess.Popen([cmd], shell=True, stdout=subprocess.PIPE)
+ )
+ finally:
+ for i in range(0, args.instances):
+ if1, _ = if1_process[i].communicate(
+ timeout=args.warmup_time + 60)
+
+ if1_process = []
+ if1_results = []
+ cmd = None
+
+ try:
+ if args.async_start:
+ args.duration += 999
+ for i in range(0, args.instances):
+ cmd = u"exec sudo "
+ cmd += f"ip netns exec {args.namespace} " if args.namespace else u""
+ cmd += f"iperf3 "
+ cmd += f"--client {args.host} "
+ cmd += f"--bind {args.bind} "
+ if args.rate and args.frame_size:
+ cmd += f"--bandwidth {bandwidth} "
+ cmd += f"--length {iperf_frame_size} "
+ cmd += f"--port {5201 + i} "
+ cmd += f"--parallel {args.parallel} "
+ cmd += f"--time {args.duration} "
+ if args.affinity:
+ cmd += f"--affinity {args.affinity} "
+ if args.udp:
+ cmd += f"--udp "
+ cmd += f"--zerocopy "
+ cmd += f"--json"
+ if1_process.append(
+ subprocess.Popen([cmd], shell=True, stdout=subprocess.PIPE)
+ )
+ finally:
+ if args.async_start:
+ for i in range(0, args.instances):
+ print(if1_process[i].pid)
+ else:
+ for i in range(0, args.instances):
+ if1, _ = if1_process[i].communicate(timeout=args.duration + 60)
+ if1_results.append(json.loads(if1))
+ if1_results[i][u"end"][u"command"] = cmd
+ print(f"{json.dumps(if1_results[i]['end'], indent = 4)}")
+
+
+def main():
+ """Main function for the traffic generator using iPerf3.
+
+ It verifies the given command line arguments and runs "simple_burst"
+ function.
+ """
+ parser = argparse.ArgumentParser()
+ parser.add_argument(
+ u"--namespace", required=False, type=str,
+ help=u"Port netns name to run iPerf client on."
+ )
+ parser.add_argument(
+ u"--host", required=True, type=str,
+ help=u"Run in client mode, connecting to an iPerf server host."
+ )
+ parser.add_argument(
+ u"--bind", required=True, type=str,
+ help=u"Client bind IP address."
+ )
+ parser.add_argument(
+ u"--udp", action=u"store_true", default=False,
+ help=u"UDP test."
+ )
+ parser.add_argument(
+ u"--affinity", required=False, type=str,
+ help=u"Set the CPU affinity, if possible."
+ )
+ parser.add_argument(
+ u"--duration", required=True, type=float,
+ help=u"Duration of traffic run in seconds (-1=infinite)."
+ )
+ parser.add_argument(
+ u"--frame_size", required=False,
+ help=u"Size of a Frame without padding and IPG."
+ )
+ parser.add_argument(
+ u"--rate", required=False,
+ help=u"Traffic rate with included units (pps)."
+ )
+ parser.add_argument(
+ u"--traffic_directions", default=1, type=int,
+ help=u"Send bi- (2) or uni- (1) directional traffic."
+ )
+ parser.add_argument(
+ u"--warmup_time", type=float, default=5.0,
+ help=u"Traffic warm-up time in seconds, (0=disable)."
+ )
+ parser.add_argument(
+ u"--async_start", action=u"store_true", default=False,
+ help=u"Non-blocking call of the script."
+ )
+ parser.add_argument(
+ u"--instances", default=1, type=int,
+ help=u"The number of simultaneous client instances."
+ )
+ parser.add_argument(
+ u"--parallel", default=8, type=int,
+ help=u"The number of simultaneous client streams."
+ )
+
+ args = parser.parse_args()
+
+ # Currently limiting to uni- directional traffic.
+ if args.traffic_directions != 1:
+ print(f"Currently only uni- directional traffic is supported!")
+ sys.exit(1)
+
+ simple_burst(args)
+
+
+if __name__ == u"__main__":
+ main()
Code Review / csit.git / blobdiff