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Paolo Abenidavem330
Paolo Abeni
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davem330
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selftests: add some benchmark for UDP GRO
Run on top of veth pair, using a dummy XDP program to enable the GRO. rfc v3 -> v1: - use ip route to attach the xdp helper to the veth Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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‎tools/testing/selftests/net/Makefile

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@@ -7,6 +7,7 @@ CFLAGS += -I../../../../usr/include/
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TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh
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TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh
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TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
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TEST_PROGS += udpgro_bench.sh
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TEST_PROGS_EXTENDED := in_netns.sh
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TEST_GEN_FILES = socket
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy

‎tools/testing/selftests/net/udpgro_bench.sh

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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Run a series of udpgro benchmarks
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readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
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cleanup() {
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local -r jobs="$(jobs -p)"
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local -r ns="$(ip netns list|grep $PEER_NS)"
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[ -n "${jobs}" ] && kill -INT ${jobs} 2>/dev/null
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[ -n "$ns" ] && ip netns del $ns 2>/dev/null
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}
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trap cleanup EXIT
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run_one() {
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# use 'rx' as separator between sender args and receiver args
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local -r all="$@"
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local -r tx_args=${all%rx*}
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local -r rx_args=${all#*rx}
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ip netns add "${PEER_NS}"
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ip -netns "${PEER_NS}" link set lo up
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ip link add type veth
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ip link set dev veth0 up
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ip addr add dev veth0 192.168.1.2/24
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ip addr add dev veth0 2001:db8::2/64 nodad
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ip link set dev veth1 netns "${PEER_NS}"
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ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
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ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
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ip -netns "${PEER_NS}" link set dev veth1 up
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ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy
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ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
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ip netns exec "${PEER_NS}" ./udpgso_bench_rx -t ${rx_args} -r &
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# Hack: let bg programs complete the startup
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sleep 0.1
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./udpgso_bench_tx ${tx_args}
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}
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run_in_netns() {
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local -r args=$@
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./in_netns.sh $0 __subprocess ${args}
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}
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run_udp() {
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local -r args=$@
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echo "udp gso - over veth touching data"
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run_in_netns ${args} -S rx
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echo "udp gso and gro - over veth touching data"
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run_in_netns ${args} -S rx -G
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}
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run_tcp() {
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local -r args=$@
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echo "tcp - over veth touching data"
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run_in_netns ${args} -t rx
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}
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run_all() {
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local -r core_args="-l 4"
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local -r ipv4_args="${core_args} -4 -D 192.168.1.1"
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local -r ipv6_args="${core_args} -6 -D 2001:db8::1"
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echo "ipv4"
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run_tcp "${ipv4_args}"
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run_udp "${ipv4_args}"
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echo "ipv6"
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run_tcp "${ipv4_args}"
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run_udp "${ipv6_args}"
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}
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if [ ! -f ../bpf/xdp_dummy.o ]; then
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echo "Missing xdp_dummy helper. Build bpf selftest first"
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exit -1
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fi
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if [[ $# -eq 0 ]]; then
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run_all
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elif [[ $1 == "__subprocess" ]]; then
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shift
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run_one $@
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else
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run_in_netns $@
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fi

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