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# python3
# Copyright 2019 Google LLC
#
# 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.
"""Network microbenchmarks."""
from typing import Dict
from benchmarks import suites
from benchmarks.harness import machine
from benchmarks.suites import helpers
from benchmarks.workloads import iperf
def run_iperf(client: machine.Machine,
server: machine.Machine,
client_kwargs: Dict[str, str] = None,
server_kwargs: Dict[str, str] = None) -> str:
"""Measure iperf performance.
Args:
client: A machine object.
server: A machine object.
client_kwargs: Additional client container options.
server_kwargs: Additional server container options.
Returns:
The output of iperf.
"""
if not client_kwargs:
client_kwargs = dict()
if not server_kwargs:
server_kwargs = dict()
# Pull images.
netcat = client.pull("netcat")
iperf_client_image = client.pull("iperf")
iperf_server_image = server.pull("iperf")
# Set this due to a bug in the kernel that resets connections.
client.run("sudo /sbin/sysctl -w net.netfilter.nf_conntrack_tcp_be_liberal=1")
server.run("sudo /sbin/sysctl -w net.netfilter.nf_conntrack_tcp_be_liberal=1")
with server.container(
iperf_server_image, port=5001, **server_kwargs).detach() as iperf_server:
(host, port) = iperf_server.address()
# Wait until the service is available.
client.container(netcat).run(host=host, port=port)
# Run a warm-up run.
client.container(
iperf_client_image, stderr=True, **client_kwargs).run(
host=host, port=port)
# Run the client with relevant arguments.
res = client.container(iperf_client_image, stderr=True, **client_kwargs)\
.run(host=host, port=port)
helpers.drop_caches(client)
return res
@suites.benchmark(metrics=[iperf.bandwidth], machines=2)
def upload(client: machine.Machine, server: machine.Machine, **kwargs) -> str:
"""Measure upload performance.
Args:
client: A machine object.
server: A machine object.
**kwargs: Client container options.
Returns:
The output of iperf.
"""
if kwargs["runtime"] == "runc":
kwargs["network_mode"] = "host"
return run_iperf(client, server, client_kwargs=kwargs)
@suites.benchmark(metrics=[iperf.bandwidth], machines=2)
def download(client: machine.Machine, server: machine.Machine, **kwargs) -> str:
"""Measure download performance.
Args:
client: A machine object.
server: A machine object.
**kwargs: Server container options.
Returns:
The output of iperf.
"""
client_kwargs = {"network_mode": "host"}
return run_iperf(
client, server, client_kwargs=client_kwargs, server_kwargs=kwargs)
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