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passt/test/perf/passt_tcp
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_tcp - Check TCP performance in passt mode
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>
gtools /sbin/sysctl ip jq nproc seq sleep iperf3 tcp_rr tcp_crr # From neper
nstools /sbin/sysctl ip jq nproc seq sleep iperf3 tcp_rr tcp_crr
htools bc head sed seq
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=536870912
guest /sbin/sysctl -w net.core.wmem_max=536870912
guest /sbin/sysctl -w net.core.rmem_default=33554432
guest /sbin/sysctl -w net.core.wmem_default=33554432
guest /sbin/sysctl -w net.ipv4.tcp_rmem="4096 131072 268435456"
guest /sbin/sysctl -w net.ipv4.tcp_wmem="4096 131072 268435456"
guest /sbin/sysctl -w net.ipv4.tcp_timestamps=0
ns /sbin/sysctl -w net.ipv4.tcp_rmem="4096 524288 134217728"
ns /sbin/sysctl -w net.ipv4.tcp_wmem="4096 524288 134217728"
ns /sbin/sysctl -w net.ipv4.tcp_timestamps=0
gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
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 4
set TIME 1
set OMIT 0.1
set OPTS -Z -P __THREADS__ -l 1M -O__OMIT__
info Throughput in Gbps, latency in µs, __THREADS__ threads at __FREQ__ GHz
report passt tcp __THREADS__ __FREQ__
th MTU 256B 576B 1280B 1500B 9000B 65520B
tr TCP throughput over IPv6: guest to host
iperf3s ns 10002
bw -
bw -
guest ip link set dev __IFNAME__ mtu 1280
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -w 4M
bw __BW__ 1.2 1.5
guest ip link set dev __IFNAME__ mtu 1500
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -w 4M
bw __BW__ 1.6 1.8
guest ip link set dev __IFNAME__ mtu 9000
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -w 8M
bw __BW__ 4.0 5.0
guest ip link set dev __IFNAME__ mtu 65520
iperf3 BW guest __MAP_NS6__ 10002 __TIME__ __OPTS__ -w 16M
bw __BW__ 7.0 8.0
iperf3k ns
tl TCP RR latency over IPv6: guest to host
lat -
lat -
lat -
lat -
lat -
nsb tcp_rr --nolog -6
gout LAT tcp_rr --nolog -l1 -6 -c -H __MAP_NS6__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tl TCP CRR latency over IPv6: guest to host
lat -
lat -
lat -
lat -
lat -
nsb tcp_crr --nolog -6
gout LAT tcp_crr --nolog -l1 -6 -c -H __MAP_NS6__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 500 400
tr TCP throughput over IPv4: guest to host
iperf3s ns 10002
guest ip link set dev __IFNAME__ mtu 256
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 1M
bw __BW__ 0.2 0.3
guest ip link set dev __IFNAME__ mtu 576
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 1M
bw __BW__ 0.5 0.8
guest ip link set dev __IFNAME__ mtu 1280
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 4M
bw __BW__ 1.2 1.5
guest ip link set dev __IFNAME__ mtu 1500
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 4M
bw __BW__ 1.6 1.8
guest ip link set dev __IFNAME__ mtu 9000
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 8M
bw __BW__ 4.0 5.0
guest ip link set dev __IFNAME__ mtu 65520
iperf3 BW guest __MAP_NS4__ 10002 __TIME__ __OPTS__ -w 16M
bw __BW__ 7.0 8.0
iperf3k ns
# Reducing MTU below 1280 deconfigures IPv6, get our address back
guest dhclient -6 -x
guest dhclient -6 __IFNAME__
tl TCP RR latency over IPv4: guest to host
lat -
lat -
lat -
lat -
lat -
nsb tcp_rr --nolog -4
gout LAT tcp_rr --nolog -l1 -4 -c -H __MAP_NS4__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tl TCP CRR latency over IPv4: guest to host
lat -
lat -
lat -
lat -
lat -
nsb tcp_crr --nolog -4
gout LAT tcp_crr --nolog -l1 -4 -c -H __MAP_NS4__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 500 400
tr TCP throughput over IPv6: host to guest
iperf3s guest 10001
bw -
bw -
bw -
bw -
bw -
iperf3 BW ns ::1 10001 __TIME__ __OPTS__
bw __BW__ 6.0 6.8
iperf3k guest
tl TCP RR latency over IPv6: host to guest
lat -
lat -
lat -
lat -
lat -
guestb tcp_rr --nolog -P 10001 -C 10011 -6
sleep 1
nsout LAT tcp_rr --nolog -l1 -P 10001 -C 10011 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tl TCP CRR latency over IPv6: host to guest
lat -
lat -
lat -
lat -
lat -
guestb tcp_crr --nolog -P 10001 -C 10011 -6
sleep 1
nsout LAT tcp_crr --nolog -l1 -P 10001 -C 10011 -6 -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 500 350
tr TCP throughput over IPv4: host to guest
iperf3s guest 10001
bw -
bw -
bw -
bw -
bw -
iperf3 BW ns 127.0.0.1 10001 __TIME__ __OPTS__
bw __BW__ 6.0 6.8
iperf3k guest
tl TCP RR latency over IPv4: host to guest
lat -
lat -
lat -
lat -
lat -
guestb tcp_rr --nolog -P 10001 -C 10011 -4
sleep 1
nsout LAT tcp_rr --nolog -l1 -P 10001 -C 10011 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 200 150
tl TCP CRR latency over IPv6: host to guest
lat -
lat -
lat -
lat -
lat -
guestb tcp_crr --nolog -P 10001 -C 10011 -4
sleep 1
nsout LAT tcp_crr --nolog -l1 -P 10001 -C 10011 -4 -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat __LAT__ 500 300
te
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