Quelle pktgen_bench_xmit_mode_netif_receive.sh
Sprache: Shell
#!/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 $dev "flag NO_TIMESTAMP"
if [ -n "$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
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