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passt/test/perf/passt_udp
David Gibson e813a4df7d conf: Allow address remapped to host to be configured 
Because the host and guest share the same IP address with passt/pasta, it's
not possible for the guest to directly address the host.  Therefore we
allow packets from the guest going to a special "NAT to host" address to be
redirected to the host, appearing there as though they have both source and
destination address of loopback.

Currently that special address is always the address of the default
gateway (or none).  That can be a problem if we want that gateway to be
addressable by the guest.  Therefore, allow the special "NAT to host"
address to be overridden on the command line with a new --map-host-loopback
option.

In order to exercise and test it, update the passt_in_ns and perf
tests to use this option and give different mapping addresses for the
two layers of the environment.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2024-08-21 12:00:35 +02:00

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# SPDX-License-Identifier: GPL-2.0-or-later
#
# PASST - Plug A Simple Socket Transport
# for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
# for network namespace/tap device mode
#
# test/perf/passt_udp - Check UDP performance in passt mode
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>
gtools /sbin/sysctl ip jq nproc sleep iperf3 udp_rr # From neper
nstools ip jq sleep iperf3 udp_rr
htools bc head sed
set MAP_NS4 192.0.2.2
set MAP_NS6 2001:db8:9a55::2
test passt: throughput and latency
guest /sbin/sysctl -w net.core.rmem_max=16777216
guest /sbin/sysctl -w net.core.wmem_max=16777216
guest /sbin/sysctl -w net.core.rmem_default=16777216
guest /sbin/sysctl -w net.core.wmem_default=16777216
hout FREQ_PROCFS (echo "scale=1"; sed -n 's/cpu MHz.*: \([0-9]*\)\..*$/(\1+10^2\/2)\/10^3/p' /proc/cpuinfo) | bc -l | head -n1
hout FREQ_CPUFREQ (echo "scale=1"; printf '( %i + 10^5 / 2 ) / 10^6\n' $(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq) ) | bc -l
hout FREQ [ -n "__FREQ_CPUFREQ__" ] && echo __FREQ_CPUFREQ__ || echo __FREQ_PROCFS__
set THREADS 2
set TIME 1
set OPTS -u -P __THREADS__ --pacing-timer 1000
info Throughput in Gbps, latency in µs, __THREADS__ threads at __FREQ__ GHz
report passt udp __THREADS__ __FREQ__
th pktlen 256B 576B 1280B 1500B 9000B 65520B
tr UDP throughput over IPv6: guest to host
iperf3s ns 10002
# (datagram size) = (packet size) - 48: 40 bytes of IPv6 header, 8 of UDP header
bw -
bw -
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -b 3G -l 1232
bw __BW__ 0.8 1.2
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -b 4G -l 1452
bw __BW__ 1.0 1.5
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -b 8G -l 8952
bw __BW__ 4.0 5.0
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -b 15G -l 64372
bw __BW__ 4.0 5.0
iperf3k ns
tl UDP RR latency over IPv6: guest to host
lat -
lat -
lat -
lat -
lat -
nsb udp_rr --nolog -6
gout LAT udp_rr --nolog -6 -c -H __MAP_NS6__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tr UDP throughput over IPv4: guest to host
iperf3s ns 10002
# (datagram size) = (packet size) - 28: 20 bytes of IPv4 header, 8 of UDP header
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 1G -l 228
bw __BW__ 0.0 0.0
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 2G -l 548
bw __BW__ 0.4 0.6
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 3G -l 1252
bw __BW__ 0.8 1.2
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 4G -l 1472
bw __BW__ 1.0 1.5
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 8G -l 8972
bw __BW__ 4.0 5.0
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -b 15G -l 65492
bw __BW__ 4.0 5.0
iperf3k ns
tl UDP RR latency over IPv4: guest to host
lat -
lat -
lat -
lat -
lat -
nsb udp_rr --nolog -4
gout LAT udp_rr --nolog -4 -c -H __MAP_NS4__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tr UDP throughput over IPv6: host to guest
iperf3s guest 10001
# (datagram size) = (packet size) - 48: 40 bytes of IPv6 header, 8 of UDP header
bw -
bw -
iperf3 BW ns ::1 10001 __TIME__ __OPTS__ -b 3G -l 1232
bw __BW__ 0.8 1.2
iperf3 BW ns ::1 10001 __TIME__ __OPTS__ -b 4G -l 1452
bw __BW__ 1.0 1.5
iperf3 BW ns ::1 10001 __TIME__ __OPTS__ -b 8G -l 8952
bw __BW__ 3.0 4.0
iperf3 BW ns ::1 10001 __TIME__ __OPTS__ -b 15G -l 64372
bw __BW__ 3.0 4.0
iperf3k guest
tl UDP RR latency over IPv6: host to guest
lat -
lat -
lat -
lat -
lat -
guestb udp_rr --nolog -P 10001 -C 10011 -6
sleep 1
nsout LAT udp_rr --nolog -P 10001 -C 10011 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tr UDP throughput over IPv4: host to guest
iperf3s guest 10001
# (datagram size) = (packet size) - 28: 20 bytes of IPv4 header, 8 of UDP header
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 1G -l 228
bw __BW__ 0.0 0.0
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 2G -l 548
bw __BW__ 0.4 0.6
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 3G -l 1252
bw __BW__ 0.8 1.2
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 4G -l 1472
bw __BW__ 1.0 1.5
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 8G -l 8972
bw __BW__ 3.0 4.0
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__ -b 15G -l 65492
bw __BW__ 3.0 4.0
iperf3k guest
tl UDP RR latency over IPv4: host to guest
lat -
lat -
lat -
lat -
lat -
guestb udp_rr --nolog -P 10001 -C 10011 -4
sleep 1
nsout LAT udp_rr --nolog -P 10001 -C 10011 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
te
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