X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Ftools%2Ft-rex%2Ft-rex-stateless-profile.py;fp=resources%2Ftools%2Ft-rex%2Ft-rex-stateless-profile.py;h=0bbd241f8b083edaf7b2b1b4948acf41497e40e2;hp=0000000000000000000000000000000000000000;hb=b92b5be7d4bbbf523812f774bb2e539ab2081cf6;hpb=78e999f1203dc8b7c29c24b0178bb8c23edf4c52

diff --git a/resources/tools/t-rex/t-rex-stateless-profile.py b/resources/tools/t-rex/t-rex-stateless-profile.py
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+++ b/resources/tools/t-rex/t-rex-stateless-profile.py
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+#!/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()