+++ /dev/null
-#!/usr/bin/python3
-
-# Copyright (c) 2020 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 argparse
-import json
-import sys
-import time
-
-sys.path.insert(
- 0, u"/opt/trex-core-2.73/scripts/automation/trex_control_plane/interactive/"
-)
-from trex.stl.api import *
-
-
-def fmt_latency(lat_min, lat_avg, lat_max, hdrh):
- """Return formatted, rounded latency.
-
- :param lat_min: Min latency
- :param lat_avg: Average latency
- :param lat_max: Max latency
- :param hdrh: Base64 encoded compressed HDRHistogram object.
- :type lat_min: str
- :type lat_avg: str
- :type lat_max: str
- :type hdrh: str
- :return: Formatted and rounded output (hdrh unchanged) "min/avg/max/hdrh".
- :rtype: str
- """
- 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 u"/".join(str(tmp) for tmp in (t_min, t_avg, t_max, hdrh))
-
-
-def simple_burst(
- profile_file, duration, framesize, rate, warmup_time, port_0, port_1,
- latency, async_start=False, traffic_directions=2, force=False):
- """Send 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.
- :param traffic_directions: Bidirectional (2) or unidirectional (1) traffic.
- :param force: Force start regardless of ports state.
- :type profile_file: str
- :type framesize: int or str
- :type duration: float
- :type rate: str
- :type warmup_time: float
- :type port_0: int
- :type port_1: int
- :type latency: bool
- :type async_start: bool
- :type traffic_directions: int
- :type force: bool
- """
- client = None
- total_rcvd = 0
- total_sent = 0
- approximated_duration = 0
- approximated_rate = 0
- lost_a = 0
- lost_b = 0
- lat_a = u"-1/-1/-1/"
- lat_b = u"-1/-1/-1/"
-
- # Read the profile:
- try:
- print(f"### Profile file:\n{profile_file}")
- profile = STLProfile.load(
- profile_file, direction=0, port_id=0, framesize=framesize,
- rate=rate
- )
- streams = profile.get_streams()
- except STLError as err:
- print(f"Error while loading profile '{profile_file}' {err!r}")
- sys.exit(1)
-
- try:
- # Create the client:
- client = STLClient()
- # 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 u"macsrc" in profile_file:
- client.set_port_attr(ports=[port_0, port_1], promiscuous=True)
- if isinstance(framesize, int):
- last_stream_a = int((len(streams) - 2 ) / 2)
- last_stream_b = (last_stream_a * 2)
- client.add_streams(streams[0:last_stream_a], ports=[port_0])
- if traffic_directions > 1:
- client.add_streams(
- streams[last_stream_a:last_stream_b], ports=[port_1])
- elif isinstance(framesize, str):
- client.add_streams(streams[0:3], ports=[port_0])
- if traffic_directions > 1:
- client.add_streams(streams[3:6], ports=[port_1])
- if latency:
- try:
- if isinstance(framesize, int):
- client.add_streams(streams[last_stream_b], ports=[port_0])
- if traffic_directions > 1:
- client.add_streams(
- streams[last_stream_b + 1], ports=[port_1])
- elif isinstance(framesize, str):
- latency = False
- except STLError:
- # Disable latency if NIC does not support requested stream type
- print(u"##### FAILED to add latency streams #####")
- latency = False
- ports = [port_0]
- if traffic_directions > 1:
- ports.append(port_1)
- # Warm-up phase:
- if warmup_time > 0:
- # Clear the stats before injecting:
- client.clear_stats()
-
- # Choose rate and start traffic:
- client.start(ports=ports, mult=rate, duration=warmup_time,
- force=force)
-
- # Block until done:
- time_start = time.monotonic()
- client.wait_on_traffic(ports=ports, timeout=warmup_time+30)
- time_stop = time.monotonic()
- approximated_duration = time_stop - time_start
-
- if client.get_warnings():
- for warning in client.get_warnings():
- print(warning)
-
- # Read the stats after the test:
- stats = client.get_stats()
-
- print(u"##### Warmup statistics #####")
- print(json.dumps(stats, indent=4, separators=(u",", u": ")))
-
- lost_a = stats[port_0][u"opackets"] - stats[port_1][u"ipackets"]
- if traffic_directions > 1:
- lost_b = stats[port_1][u"opackets"] - stats[port_0][u"ipackets"]
-
- print(f"\npackets lost from {port_0} --> {port_1}: {lost_a} pkts")
- if traffic_directions > 1:
- print(f"packets lost from {port_1} --> {port_0}: {lost_b} pkts")
-
- # Clear the stats before injecting:
- client.clear_stats()
- lost_a = 0
- lost_b = 0
-
- # Choose rate and start traffic:
- client.start(ports=ports, mult=rate, duration=duration, force=force)
-
- if async_start:
- # For async stop, we need to export the current snapshot.
- xsnap0 = client.ports[0].get_xstats().reference_stats
- print(f"Xstats snapshot 0: {xsnap0!r}")
- if traffic_directions > 1:
- xsnap1 = client.ports[1].get_xstats().reference_stats
- print(f"Xstats snapshot 1: {xsnap1!r}")
- else:
- # Block until done:
- time_start = time.monotonic()
- client.wait_on_traffic(ports=ports, timeout=duration+30)
- time_stop = time.monotonic()
- approximated_duration = time_stop - time_start
-
- if client.get_warnings():
- for warning in client.get_warnings():
- print(warning)
-
- # Read the stats after the test
- stats = client.get_stats()
-
- print(u"##### Statistics #####")
- print(json.dumps(stats, indent=4, separators=(u",", u": ")))
-
- lost_a = stats[port_0][u"opackets"] - stats[port_1][u"ipackets"]
- if traffic_directions > 1:
- lost_b = stats[port_1][u"opackets"] - stats[port_0][u"ipackets"]
-
- # Stats index is not a port number, but "pgid".
- if latency:
- lat_obj = stats[u"latency"][0][u"latency"]
- lat_a = fmt_latency(
- str(lat_obj[u"total_min"]), str(lat_obj[u"average"]),
- str(lat_obj[u"total_max"]), str(lat_obj[u"hdrh"]))
- if traffic_directions > 1:
- lat_obj = stats[u"latency"][1][u"latency"]
- lat_b = fmt_latency(
- str(lat_obj[u"total_min"]), str(lat_obj[u"average"]),
- str(lat_obj[u"total_max"]), str(lat_obj[u"hdrh"]))
-
- if traffic_directions > 1:
- total_sent = stats[0][u"opackets"] + stats[1][u"opackets"]
- total_rcvd = stats[0][u"ipackets"] + stats[1][u"ipackets"]
- else:
- total_sent = stats[port_0][u"opackets"]
- total_rcvd = stats[port_1][u"ipackets"]
- try:
- approximated_rate = total_sent / approximated_duration
- except ZeroDivisionError:
- pass
-
- print(f"\npackets lost from {port_0} --> {port_1}: {lost_a} pkts")
- if traffic_directions > 1:
- print(f"packets lost from {port_1} --> {port_0}: {lost_b} pkts")
-
- except STLError as ex_error:
- print(ex_error, file=sys.stderr)
- sys.exit(1)
-
- finally:
- if async_start:
- if client:
- client.disconnect(stop_traffic=False, release_ports=True)
- else:
- if client:
- client.disconnect()
- print(
- f"rate={rate!r}, totalReceived={total_rcvd}, "
- f"totalSent={total_sent}, frameLoss={lost_a + lost_b}, "
- f"targetDuration={duration!r}, "
- f"approximatedDuration={approximated_duration!r}, "
- f"approximatedRate={approximated_rate}, "
- f"latencyStream0(usec)={lat_a}, latencyStream1(usec)={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(
- u"-p", u"--profile", required=True, type=str,
- help=u"Python traffic profile."
- )
- parser.add_argument(
- u"-d", u"--duration", required=True, type=float,
- help=u"Duration of traffic run."
- )
- parser.add_argument(
- u"-s", u"--frame_size", required=True,
- help=u"Size of a Frame without padding and IPG."
- )
- parser.add_argument(
- u"-r", u"--rate", required=True,
- help=u"Traffic rate with included units (%, pps)."
- )
- parser.add_argument(
- u"-w", u"--warmup_time", type=float, default=5.0,
- help=u"Traffic warm-up time in seconds, 0 = disable."
- )
- parser.add_argument(
- u"--port_0", required=True, type=int,
- help=u"Port 0 on the traffic generator."
- )
- parser.add_argument(
- u"--port_1", required=True, type=int,
- help=u"Port 1 on the traffic generator."
- )
- parser.add_argument(
- u"--async_start", action=u"store_true", default=False,
- help=u"Non-blocking call of the script."
- )
- parser.add_argument(
- u"--latency", action=u"store_true", default=False,
- help=u"Add latency stream."
- )
- parser.add_argument(
- u"--traffic_directions", type=int, default=2,
- help=u"Send bi- (2) or uni- (1) directional traffic."
- )
- parser.add_argument(
- u"--force", action=u"store_true", default=False,
- help=u"Force start regardless of ports state."
- )
-
- args = parser.parse_args()
-
- try:
- framesize = int(args.frame_size)
- except ValueError:
- framesize = args.frame_size
-
- simple_burst(
- profile_file=args.profile, duration=args.duration, framesize=framesize,
- rate=args.rate, warmup_time=args.warmup_time, port_0=args.port_0,
- port_1=args.port_1, latency=args.latency, async_start=args.async_start,
- traffic_directions=args.traffic_directions, force=args.force
- )
-
-
-if __name__ == u"__main__":
- main()
Code Review / csit.git / blobdiff