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