#!/usr/bin/python3
-# Copyright (c) 2020 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
#
#
# Note: If this file is linked with Scapy, which is GPLv2+, your use of it
# must be under GPLv2+. If at any point in the future it is no longer linked
-# with Scapy (or other GPLv2+ licensed software), you are free to choose Apache 2.
+# with Scapy (or other GPLv2+ licensed software), you are free to choose
+# Apache 2.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
import time
sys.path.insert(
- 0, u"/opt/trex-core-2.86/scripts/automation/trex_control_plane/interactive/"
+ 0, u"/opt/trex-core-2.97/scripts/automation/trex_control_plane/interactive/"
)
-from trex.stl.api import *
+from trex.stl.api import STLClient, STLProfile, STLError
def fmt_latency(lat_min, lat_avg, lat_max, hdrh):
async_start=False,
traffic_directions=2,
force=False,
+ delay=0.0,
):
"""Send traffic and measure packet loss and latency.
: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.
+ :param delay: Sleep overhead [s].
:type profile_file: str
:type framesize: int or str
:type duration: float
:type async_start: bool
:type traffic_directions: int
:type force: bool
+ :type delay: float
"""
client = None
total_rcvd = 0
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_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:
# 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)
+ # Even for unidir, both ports are needed to see both rx and tx.
+ ports = [port_0, port_1]
# Clear the stats before injecting:
client.clear_stats()
# Choose rate and start traffic:
client.start(
- ports=ports,
+ ports=ports[:traffic_directions],
mult=rate,
duration=duration,
force=force,
# 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}")
+ 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)
+ # wait_on_traffic fails if duration stretches by 30 seconds or more.
+ # TRex has some overhead, wait some more.
+ time.sleep(duration + delay)
+ client.stop()
time_stop = time.monotonic()
- approximated_duration = time_stop - time_start
-
+ approximated_duration = time_stop - time_start - delay
+ # Read the stats after the traffic stopped (or time up).
+ stats = client.get_stats()
if client.get_warnings():
for warning in client.get_warnings():
print(warning)
-
- # Read the stats after the test
- stats = client.get_stats()
+ # Now finish the complete reset.
+ client.reset()
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"]
+ lost_b = stats[port_1][u"opackets"] - stats[port_0][u"ipackets"]
# Stats index is not a port number, but "pgid".
if 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"]))
+ # Do not bother with the other dir latency if unidir.
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"]
+ total_sent = stats[0][u"opackets"] + stats[1][u"opackets"]
+ total_rcvd = stats[0][u"ipackets"] + stats[1][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")
+ print(f"packets lost from {port_1} --> {port_0}: {lost_b} pkts")
except STLError:
print(u"T-Rex STL runtime error!", file=sys.stderr)
u"--force", action=u"store_true", default=False,
help=u"Force start regardless of ports state."
)
+ parser.add_argument(
+ u"--delay", required=True, type=float, default=0.0,
+ help=u"Delay assumed for traffic, sleep time is increased by this [s]."
+ )
args = parser.parse_args()
async_start=args.async_start,
traffic_directions=args.traffic_directions,
force=args.force,
+ delay=args.delay,
)
Code Review / csit.git / blobdiff