While we are not very interested in testing performance it's useful to be able to generate a lot of traffic. iperf is the simplest way of getting relatively high PPS.
Signed-off-by: Jakub Kicinski kuba@kernel.org --- .../selftests/drivers/net/lib/py/__init__.py | 1 + .../selftests/drivers/net/lib/py/load.py | 41 +++++++++++++++++++ 2 files changed, 42 insertions(+) create mode 100644 tools/testing/selftests/drivers/net/lib/py/load.py
diff --git a/tools/testing/selftests/drivers/net/lib/py/__init__.py b/tools/testing/selftests/drivers/net/lib/py/__init__.py index 4789c1a4282d..2a2dbb1b4ad7 100644 --- a/tools/testing/selftests/drivers/net/lib/py/__init__.py +++ b/tools/testing/selftests/drivers/net/lib/py/__init__.py @@ -2,6 +2,7 @@
import sys from pathlib import Path +from .load import *
KSFT_DIR = (Path(__file__).parent / "../../../..").resolve()
diff --git a/tools/testing/selftests/drivers/net/lib/py/load.py b/tools/testing/selftests/drivers/net/lib/py/load.py new file mode 100644 index 000000000000..abdb677bdb1c --- /dev/null +++ b/tools/testing/selftests/drivers/net/lib/py/load.py @@ -0,0 +1,41 @@ +# SPDX-License-Identifier: GPL-2.0 + +import time + +from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen + +class GenerateTraffic: + def __init__(self, env): + env.require_cmd("iperf3", remote=True) + + self.env = env + + port = rand_port() + self._iperf_server = cmd(f"iperf3 -s -p {port}", background=True) + wait_port_listen(port) + time.sleep(0.1) + self._iperf_client = cmd(f"iperf3 -c {env.addr} -P 16 -p {port} -t 86400", + background=True, host=env.remote) + + # Wait for traffic to ramp up + pkt = ip("-s link show dev " + env.ifname, json=True)[0]["stats64"]["rx"]["packets"] + for _ in range(50): + time.sleep(0.1) + now = ip("-s link show dev " + env.ifname, json=True)[0]["stats64"]["rx"]["packets"] + if now - pkt > 1000: + return + pkt = now + self.stop(verbose=True) + raise Exception("iperf3 traffic did not ramp up") + + def stop(self, verbose=None): + self._iperf_client.process(terminate=True) + if verbose: + ksft_pr(">> Client:") + ksft_pr(self._iperf_client.stdout) + ksft_pr(self._iperf_client.stderr) + self._iperf_server.process(terminate=True) + if verbose: + ksft_pr(">> Server:") + ksft_pr(self._iperf_server.stdout) + ksft_pr(self._iperf_server.stderr)