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-rwxr-xr-x | samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh new file mode 100755 index 0000000..cb15903 --- /dev/null +++ b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh @@ -0,0 +1,86 @@ +#!/bin/bash +# +# 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 ${basedir}/parameters.sh +# Using invalid DST_MAC will cause the packets to get dropped in +# ip_rcv() which is part of the test +[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42" +[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" +[ -z "$BURST" ] && BURST=1024 + +# Base Config +DELAY="0" # Zero means max speed +COUNT="10000000" # Zero means indefinitely + +# General cleanup everything since last run +pg_ctrl "reset" + +# Threads are specified with parameter -t value in $THREADS +for ((thread = 0; thread < $THREADS; thread++)); do + # The device name is extended with @name, using thread number to + # make then unique, but any name will do. + dev=${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 $DEST_IP" + + # 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 = 0; thread < $THREADS; thread++)); do + dev=${DEV}@${thread} + echo "Device: $dev" + cat /proc/net/pktgen/$dev | grep -A2 "Result:" +done |