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 ${basedir}/parameters.sh
17
18# Trap EXIT first
19trap_exit
20
21if [ -z "$DEST_IP" ]; then
22    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
23fi
24[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
25
26# Burst greater than 1 are invalid for queue_xmit mode
27if [[ -n "$BURST" ]]; then
28    err 1 "Bursting not supported for this mode"
29fi
30[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
31if [ -n "$DEST_IP" ]; then
32    validate_addr${IP6} $DEST_IP
33    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
34fi
35if [ -n "$DST_PORT" ]; then
36    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
37    validate_ports $UDP_DST_MIN $UDP_DST_MAX
38fi
39
40# General cleanup everything since last run
41pg_ctrl "reset"
42
43# Threads are specified with parameter -t value in $THREADS
44for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
45    # The device name is extended with @name, using thread number to
46    # make then unique, but any name will do.
47    dev=${DEV}@${thread}
48
49    # Add remove all other devices and add_device $dev to thread
50    pg_thread $thread "rem_device_all"
51    pg_thread $thread "add_device" $dev
52
53    # Base config of dev
54    pg_set $dev "flag QUEUE_MAP_CPU"
55    pg_set $dev "count $COUNT"
56    pg_set $dev "pkt_size $PKT_SIZE"
57    pg_set $dev "delay $DELAY"
58    pg_set $dev "flag NO_TIMESTAMP"
59
60    # Destination
61    pg_set $dev "dst_mac $DST_MAC"
62    pg_set $dev "dst${IP6}_min $DST_MIN"
63    pg_set $dev "dst${IP6}_max $DST_MAX"
64
65    if [ -n "$DST_PORT" ]; then
66	# Single destination port or random port range
67	pg_set $dev "flag UDPDST_RND"
68	pg_set $dev "udp_dst_min $UDP_DST_MIN"
69	pg_set $dev "udp_dst_max $UDP_DST_MAX"
70    fi
71
72    # Inject packet into TX qdisc egress path of stack
73    pg_set $dev "xmit_mode queue_xmit"
74done
75
76# Run if user hits control-c
77function print_result {
78    # Print results
79    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
80        dev=${DEV}@${thread}
81        echo "Device: $dev"
82        cat /proc/net/pktgen/$dev | grep -A2 "Result:"
83    done
84}
85# trap keyboard interrupt (Ctrl-C)
86trap true SIGINT
87
88# start_run
89echo "Running... ctrl^C to stop" >&2
90pg_ctrl "start"
91echo "Done" >&2
92
93print_result
94