1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Benchmark script:
5#  - developed for benchmarking egress qdisc path, derived (more
6#    like cut'n'pasted) from ingress benchmark script.
7#
8# Script for injecting packets into egress qdisc path of the stack
9# with pktgen "xmit_mode queue_xmit".
10#
11basedir=`dirname $0`
12source ${basedir}/functions.sh
13root_check_run_with_sudo "$@"
14
15# Parameter parsing via include
16source ${basedir}/parameters.sh
17if [ -z "$DEST_IP" ]; then
18    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
19fi
20[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
21
22# Burst greater than 1 are invalid for queue_xmit mode
23if [[ -n "$BURST" ]]; then
24    err 1 "Bursting not supported for this mode"
25fi
26[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
27if [ -n "$DST_PORT" ]; then
28    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
29    validate_ports $DST_MIN $DST_MAX
30fi
31
32# Base Config
33DELAY="0"        # Zero means max speed
34
35# General cleanup everything since last run
36pg_ctrl "reset"
37
38# Threads are specified with parameter -t value in $THREADS
39for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
40    # The device name is extended with @name, using thread number to
41    # make then unique, but any name will do.
42    dev=${DEV}@${thread}
43
44    # Add remove all other devices and add_device $dev to thread
45    pg_thread $thread "rem_device_all"
46    pg_thread $thread "add_device" $dev
47
48    # Base config of dev
49    pg_set $dev "flag QUEUE_MAP_CPU"
50    pg_set $dev "count $COUNT"
51    pg_set $dev "pkt_size $PKT_SIZE"
52    pg_set $dev "delay $DELAY"
53    pg_set $dev "flag NO_TIMESTAMP"
54
55    # Destination
56    pg_set $dev "dst_mac $DST_MAC"
57    pg_set $dev "dst$IP6 $DEST_IP"
58
59    if [ -n "$DST_PORT" ]; then
60	# Single destination port or random port range
61	pg_set $dev "flag UDPDST_RND"
62	pg_set $dev "udp_dst_min $DST_MIN"
63	pg_set $dev "udp_dst_max $DST_MAX"
64    fi
65
66    # Inject packet into TX qdisc egress path of stack
67    pg_set $dev "xmit_mode queue_xmit"
68done
69
70# start_run
71echo "Running... ctrl^C to stop" >&2
72pg_ctrl "start"
73echo "Done" >&2
74
75# Print results
76for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
77    dev=${DEV}@${thread}
78    echo "Device: $dev"
79    cat /proc/net/pktgen/$dev | grep -A2 "Result:"
80done
81