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 "$DEST_IP" ]; then
28    validate_addr${IP6} $DEST_IP
29    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
30fi
31if [ -n "$DST_PORT" ]; then
32    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
33    validate_ports $UDP_DST_MIN $UDP_DST_MAX
34fi
35
36# General cleanup everything since last run
37pg_ctrl "reset"
38
39# Threads are specified with parameter -t value in $THREADS
40for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
41    # The device name is extended with @name, using thread number to
42    # make then unique, but any name will do.
43    dev=${DEV}@${thread}
44
45    # Add remove all other devices and add_device $dev to thread
46    pg_thread $thread "rem_device_all"
47    pg_thread $thread "add_device" $dev
48
49    # Base config of dev
50    pg_set $dev "flag QUEUE_MAP_CPU"
51    pg_set $dev "count $COUNT"
52    pg_set $dev "pkt_size $PKT_SIZE"
53    pg_set $dev "delay $DELAY"
54    pg_set $dev "flag NO_TIMESTAMP"
55
56    # Destination
57    pg_set $dev "dst_mac $DST_MAC"
58    pg_set $dev "dst${IP6}_min $DST_MIN"
59    pg_set $dev "dst${IP6}_max $DST_MAX"
60
61    if [ -n "$DST_PORT" ]; then
62	# Single destination port or random port range
63	pg_set $dev "flag UDPDST_RND"
64	pg_set $dev "udp_dst_min $UDP_DST_MIN"
65	pg_set $dev "udp_dst_max $UDP_DST_MAX"
66    fi
67
68    # Inject packet into TX qdisc egress path of stack
69    pg_set $dev "xmit_mode queue_xmit"
70done
71
72# Run if user hits control-c
73function print_result {
74    # Print results
75    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
76        dev=${DEV}@${thread}
77        echo "Device: $dev"
78        cat /proc/net/pktgen/$dev | grep -A2 "Result:"
79    done
80}
81# trap keyboard interrupt (Ctrl-C)
82trap true SIGINT
83
84# start_run
85echo "Running... ctrl^C to stop" >&2
86pg_ctrl "start"
87echo "Done" >&2
88
89print_result
90