--- /dev/null
+#!/usr/bin/python
+
+# Copyright (c) 2017 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 traffic profile together with other parameters, reads
+the profile and sends the traffic. At the end, it measures the packet loss and
+latency.
+"""
+
+import sys
+import argparse
+import json
+
+sys.path.insert(0, "/opt/trex-core-2.25/scripts/automation/"
+ "trex_control_plane/stl/")
+
+from trex_stl_lib.api import *
+
+
+def fmt_latency(lat_min, lat_avg, lat_max):
+ """Return formatted, rounded latency.
+
+ :param lat_min: Min latency
+ :param lat_avg: Average latency
+ :param lat_max: Max latency
+ :type lat_min: string
+ :type lat_avg: string
+ :type lat_max: string
+ :return: Formatted and rounded output "min/avg/max"
+ :rtype: string
+ """
+
+ try:
+ t_min = int(round(float(lat_min)))
+ except ValueError:
+ t_min = int(-1)
+ try:
+ t_avg = int(round(float(lat_avg)))
+ except ValueError:
+ t_avg = int(-1)
+ try:
+ t_max = int(round(float(lat_max)))
+ except ValueError:
+ t_max = int(-1)
+
+ return "/".join(str(tmp) for tmp in (t_min, t_avg, t_max))
+
+
+def simple_burst(profile_file, duration, framesize, rate, warmup_time, port_0,
+ port_1, latency, async_start=False):
+ """Send the traffic and measure packet loss and latency.
+
+ Procedure:
+ - reads the given traffic profile with streams,
+ - connects to the T-rex client,
+ - resets the ports,
+ - removes all existing streams,
+ - adds streams from the traffic profile to the ports,
+ - if the warm-up time is more than 0, sends the warm-up traffic, reads the
+ statistics,
+ - clears the statistics from the client,
+ - starts the traffic,
+ - waits for the defined time (or runs forever if async mode is defined),
+ - stops the traffic,
+ - reads and displays the statistics and
+ - disconnects from the client.
+
+ :param profile_file: A python module with T-rex traffic profile.
+ :param framesize: Frame size.
+ :param duration: Duration of traffic run in seconds (-1=infinite).
+ :param rate: Traffic rate [percentage, pps, bps].
+ :param warmup_time: Traffic warm-up time in seconds, 0 = disable.
+ :param port_0: Port 0 on the traffic generator.
+ :param port_1: Port 1 on the traffic generator.
+ :param latency: With latency stats.
+ :param async_start: Start the traffic and exit.
+ :type profile_file: str
+ :type framesize: int or str
+ :type duration: int
+ :type rate: str
+ :type warmup_time: int
+ :type port_0: int
+ :type port_1: int
+ :type latency: boo;
+ :type async_start: bool
+ """
+
+ client = None
+ total_rcvd = 0
+ total_sent = 0
+ lost_a = 0
+ lost_b = 0
+ lat_a = "-1/-1/-1"
+ lat_b = "-1/-1/-1"
+
+ # Read the profile:
+ try:
+ print("### Profile file:\n{}".format(profile_file))
+ profile = STLProfile.load(profile_file, direction=0, port_id=0,
+ framesize=framesize)
+ print("\n### Profiles ###\n")
+ print(profile.dump_to_yaml())
+ streams = profile.get_streams()
+ except STLError:
+ print("Error while loading profile '{0}'\n".format(profile_file))
+ sys.exit(1)
+
+ try:
+ # Create the client:
+ client = STLClient(verbose_level=LoggerApi.VERBOSE_QUIET)
+ # Connect to server:
+ client.connect()
+ # Prepare our ports (the machine has 0 <--> 1 with static route):
+ client.reset(ports=[port_0, port_1])
+ client.remove_all_streams(ports=[port_0, port_1])
+
+ if isinstance(framesize, int):
+ client.add_streams(streams[0], ports=[port_0])
+ client.add_streams(streams[1], ports=[port_1])
+ elif isinstance(framesize, str):
+ client.add_streams(streams[0:3], ports=[port_0])
+ client.add_streams(streams[3:6], ports=[port_1])
+ if latency:
+ try:
+ if isinstance(framesize, int):
+ client.add_streams(streams[2], ports=[port_0])
+ client.add_streams(streams[3], ports=[port_1])
+ elif isinstance(framesize, str):
+ latency = False
+ except STLError:
+ # Disable latency if NIC does not support requested stream type
+ print("##### FAILED to add latency streams #####")
+ latency = False
+ # Warm-up phase:
+ if warmup_time > 0:
+ # Clear the stats before injecting:
+ client.clear_stats()
+
+ # Choose rate and start traffic:
+ client.start(ports=[port_0, port_1], mult=rate,
+ duration=warmup_time)
+
+ # Block until done:
+ client.wait_on_traffic(ports=[port_0, port_1],
+ timeout=warmup_time+30)
+
+ if client.get_warnings():
+ for warning in client.get_warnings():
+ print(warning)
+
+ # Read the stats after the test:
+ stats = client.get_stats()
+
+ print("##### Warmup statistics #####")
+ print(json.dumps(stats, indent=4, separators=(',', ': '),
+ sort_keys=True))
+
+ lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
+ lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
+
+ print("\npackets lost from 0 --> 1: {0} pkts".format(lost_a))
+ print("packets lost from 1 --> 0: {0} pkts".format(lost_b))
+
+ # Clear the stats before injecting:
+ client.clear_stats()
+ lost_a = 0
+ lost_b = 0
+
+ # Choose rate and start traffic:
+ client.start(ports=[port_0, port_1], mult=rate, duration=duration)
+
+ if not async_start:
+ # Block until done:
+ client.wait_on_traffic(ports=[port_0, port_1], timeout=duration+30)
+
+ if client.get_warnings():
+ for warning in client.get_warnings():
+ print(warning)
+
+ # Read the stats after the test
+ stats = client.get_stats()
+
+ print("##### Statistics #####")
+ print(json.dumps(stats, indent=4, separators=(',', ': '),
+ sort_keys=True))
+
+ lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
+ lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
+
+ if latency:
+ lat_a = fmt_latency(
+ str(stats["latency"][0]["latency"]["total_min"]),
+ str(stats["latency"][0]["latency"]["average"]),
+ str(stats["latency"][0]["latency"]["total_max"]))
+ lat_b = fmt_latency(
+ str(stats["latency"][1]["latency"]["total_min"]),
+ str(stats["latency"][1]["latency"]["average"]),
+ str(stats["latency"][1]["latency"]["total_max"]))
+
+ total_sent = stats[0]["opackets"] + stats[1]["opackets"]
+ total_rcvd = stats[0]["ipackets"] + stats[1]["ipackets"]
+
+ print("\npackets lost from 0 --> 1: {0} pkts".format(lost_a))
+ print("packets lost from 1 --> 0: {0} pkts".format(lost_b))
+
+ except STLError as err:
+ sys.stderr.write("{0}\n".format(err))
+ sys.exit(1)
+
+ finally:
+ if async_start:
+ if client:
+ client.disconnect(stop_traffic=False, release_ports=True)
+ else:
+ if client:
+ client.disconnect()
+ print("rate={0}, totalReceived={1}, totalSent={2}, "
+ "frameLoss={3}, latencyStream0(usec)={4}, "
+ "latencyStream1(usec)={5}".
+ format(rate, total_rcvd, total_sent, lost_a + lost_b,
+ lat_a, lat_b))
+
+
+def main():
+ """Main function for the traffic generator using T-rex.
+
+ It verifies the given command line arguments and runs "simple_burst"
+ function.
+ """
+
+ parser = argparse.ArgumentParser()
+ parser.add_argument("-p", "--profile",
+ required=True,
+ type=str,
+ help="Python traffic profile.")
+ parser.add_argument("-d", "--duration",
+ required=True,
+ type=int,
+ help="Duration of traffic run.")
+ parser.add_argument("-s", "--frame_size",
+ required=True,
+ help="Size of a Frame without padding and IPG.")
+ parser.add_argument("-r", "--rate",
+ required=True,
+ help="Traffic rate with included units (%, pps).")
+ parser.add_argument("-w", "--warmup_time",
+ type=int,
+ default=5,
+ help="Traffic warm-up time in seconds, 0 = disable.")
+ parser.add_argument("--port_0",
+ required=True,
+ type=int,
+ help="Port 0 on the traffic generator.")
+ parser.add_argument("--port_1",
+ required=True,
+ type=int,
+ help="Port 1 on the traffic generator.")
+ parser.add_argument("--async",
+ action="store_true",
+ default=False,
+ help="Non-blocking call of the script.")
+ parser.add_argument("--latency",
+ action="store_true",
+ default=False,
+ help="Add latency stream")
+ args = parser.parse_args()
+
+ try:
+ framesize = int(args.frame_size)
+ except ValueError:
+ framesize = args.frame_size
+
+ simple_burst(profile_file=args.profile,
+ duration=int(args.duration),
+ framesize=framesize,
+ rate=args.rate,
+ warmup_time=int(args.warmup_time),
+ port_0=int(args.port_0),
+ port_1=int(args.port_1),
+ latency=args.latency,
+ async_start=args.async)
+
+
+if __name__ == '__main__':
+ main()
Code Review / csit.git / blobdiff