linux-stable/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
J.J. Martzki a27ac53909 samples: pktgen: fix append mode failed issue
Each sample script sources functions.sh before parameters.sh
which makes $APPEND undefined when trapping EXIT no matter in
append mode or not. Due to this when sample scripts finished
they always do "pgctrl reset" which resets pktgen config.

So move trap to each script after sourcing parameters.sh
and trap EXIT explicitly.

Signed-off-by: J.J. Martzki <mars14850@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-07-03 09:15:26 +01:00

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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 ${basedir}/parameters.sh
# Trap EXIT first
trap_exit
# Using invalid DST_MAC will cause the packets to get dropped in
# ip_rcv() which is part of the test
if [ -z "$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
# 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
# Run if user hits control-c
function print_result() {
# 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
}
# trap keyboard interrupt (Ctrl-C)
trap true SIGINT
# start_run
echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
echo "Done" >&2
print_result