3 # Copyright (c) 2019 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 """This script uses T-REX stateless API to drive t-rex instance.
19 - T-REX: https://github.com/cisco-system-traffic-generator/trex-core
20 - compiled and running T-REX process (eg. ./t-rex-64 -i)
21 - trex.stl.api library
22 - Script must be executed on a node with T-REX instance
25 1. Stop any running traffic
31 sys.path.insert(0, "/opt/trex-core-2.54/scripts/automation/"+\
32 "trex_control_plane/interactive/")
33 from trex.stl.api import *
37 """Stop traffic if any is running. Report xstats."""
43 client.acquire(force=True)
44 # TODO: Support unidirection.
45 client.stop(ports=[0, 1])
47 # read the stats after the test
48 xstats0 = client.get_xstats(0)
49 xstats1 = client.get_xstats(1)
51 # If STLError happens, let the script fail with stack trace.
55 print("##### statistics port 0 #####")
56 print(json.dumps(xstats0, indent=4, separators=(',', ': ')))
57 print("##### statistics port 1 #####")
58 print(json.dumps(xstats1, indent=4, separators=(',', ': ')))
60 tx_0, rx_0 = xstats0["tx_good_packets"], xstats0["rx_good_packets"]
61 tx_1, rx_1 = xstats1["tx_good_packets"], xstats1["rx_good_packets"]
62 lost_a, lost_b = tx_0 - rx_1, tx_1 - rx_0
64 print("\npackets lost from 0 --> 1: {0} pkts".format(lost_a))
65 print("packets lost from 1 --> 0: {0} pkts".format(lost_b))
67 total_rcvd, total_sent = rx_0 + rx_1, tx_0 + tx_1
68 total_lost = total_sent - total_rcvd
71 "rate='unknown', totalReceived={rec}, totalSent={sen}, frameLoss={los},"
72 " latencyStream0(usec)=-1/-1/-1, latencyStream1(usec)=-1/-1/-1,"
73 " targetDuration='manual'".format(
74 rec=total_rcvd, sen=total_sent, los=total_lost))
76 if __name__ == "__main__":