2023-08-30 17:31:07 +02:00
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Benchmark script:
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# - developed for benchmarking ingress qdisc path
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#
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# Script for injecting packets into RX path of the stack with pktgen
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# "xmit_mode netif_receive". With an invalid dst_mac this will only
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# measure the ingress code path as packets gets dropped in ip_rcv().
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#
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# This script don't really need any hardware. It benchmarks software
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# RX path just after NIC driver level. With bursting is also
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# "removes" the SKB alloc/free overhead.
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#
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# Setup scenarios for measuring ingress qdisc (with invalid dst_mac):
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# ------------------------------------------------------------------
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# (1) no ingress (uses static_key_false(&ingress_needed))
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#
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# (2) ingress on other dev (change ingress_needed and calls
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# handle_ing() but exit early)
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#
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# config: tc qdisc add dev $SOMEDEV handle ffff: ingress
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#
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# (3) ingress on this dev, handle_ing() -> tc_classify()
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#
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# config: tc qdisc add dev $DEV handle ffff: ingress
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#
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# (4) ingress on this dev + drop at u32 classifier/action.
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#
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basedir=`dirname $0`
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source ${basedir}/functions.sh
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root_check_run_with_sudo "$@"
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# Parameter parsing via include
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source ${basedir}/parameters.sh
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2023-10-24 12:59:35 +02:00
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# Trap EXIT first
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trap_exit
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2023-08-30 17:31:07 +02:00
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# Using invalid DST_MAC will cause the packets to get dropped in
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# ip_rcv() which is part of the test
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if [ -z "$DEST_IP" ]; then
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[ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
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fi
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[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
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[ -z "$BURST" ] && BURST=1024
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[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
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if [ -n "$DEST_IP" ]; then
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validate_addr${IP6} $DEST_IP
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read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
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fi
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if [ -n "$DST_PORT" ]; then
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read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
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validate_ports $UDP_DST_MIN $UDP_DST_MAX
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fi
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# General cleanup everything since last run
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pg_ctrl "reset"
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# Threads are specified with parameter -t value in $THREADS
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for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
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# The device name is extended with @name, using thread number to
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# make then unique, but any name will do.
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dev=${DEV}@${thread}
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# Add remove all other devices and add_device $dev to thread
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pg_thread $thread "rem_device_all"
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pg_thread $thread "add_device" $dev
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# Base config of dev
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pg_set $dev "flag QUEUE_MAP_CPU"
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pg_set $dev "count $COUNT"
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pg_set $dev "pkt_size $PKT_SIZE"
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pg_set $dev "delay $DELAY"
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pg_set $dev "flag NO_TIMESTAMP"
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# Destination
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pg_set $dev "dst_mac $DST_MAC"
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pg_set $dev "dst${IP6}_min $DST_MIN"
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pg_set $dev "dst${IP6}_max $DST_MAX"
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if [ -n "$DST_PORT" ]; then
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# Single destination port or random port range
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pg_set $dev "flag UDPDST_RND"
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pg_set $dev "udp_dst_min $UDP_DST_MIN"
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pg_set $dev "udp_dst_max $UDP_DST_MAX"
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fi
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# Inject packet into RX path of stack
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pg_set $dev "xmit_mode netif_receive"
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# Burst allow us to avoid measuring SKB alloc/free overhead
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pg_set $dev "burst $BURST"
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done
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# Run if user hits control-c
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function print_result() {
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# Print results
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for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
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dev=${DEV}@${thread}
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echo "Device: $dev"
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cat /proc/net/pktgen/$dev | grep -A2 "Result:"
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done
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}
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# trap keyboard interrupt (Ctrl-C)
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trap true SIGINT
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# start_run
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echo "Running... ctrl^C to stop" >&2
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pg_ctrl "start"
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echo "Done" >&2
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print_result
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