tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Multiqueue: Using pktgen threads for sending on multiple CPUs
5# * adding devices to kernel threads
6# * notice the naming scheme for keeping device names unique
7# * nameing scheme: dev@thread_number
8# * flow variation via random UDP source port
9#
10basedir=`dirname $0`
11source ${basedir}/functions.sh
12root_check_run_with_sudo "$@"
13#
14# Required param: -i dev in $DEV
15source ${basedir}/parameters.sh
16
17# Trap EXIT first
18trap_exit
19
20[ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely
21
22# Base Config
23[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
24
25# Flow variation random source port between min and max
26UDP_SRC_MIN=9
27UDP_SRC_MAX=109
28
29# (example of setting default params in your script)
30if [ -z "$DEST_IP" ]; then
31 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
32fi
33[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
34if [ -n "$DEST_IP" ]; then
35 validate_addr${IP6} $DEST_IP
36 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
37fi
38if [ -n "$DST_PORT" ]; then
39 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
40 validate_ports $UDP_DST_MIN $UDP_DST_MAX
41fi
42
43# General cleanup everything since last run
44[ -z "$APPEND" ] && pg_ctrl "reset"
45
46# Threads are specified with parameter -t value in $THREADS
47for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
48 # The device name is extended with @name, using thread number to
49 # make then unique, but any name will do.
50 dev=${DEV}@${thread}
51
52 # Add remove all other devices and add_device $dev to thread
53 [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
54 pg_thread $thread "add_device" $dev
55
56 # Notice config queue to map to cpu (mirrors smp_processor_id())
57 # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
58 pg_set $dev "flag QUEUE_MAP_CPU"
59
60 # Base config of dev
61 pg_set $dev "count $COUNT"
62 pg_set $dev "clone_skb $CLONE_SKB"
63 pg_set $dev "pkt_size $PKT_SIZE"
64 pg_set $dev "delay $DELAY"
65
66 # Flag example disabling timestamping
67 pg_set $dev "flag NO_TIMESTAMP"
68
69 # Destination
70 pg_set $dev "dst_mac $DST_MAC"
71 pg_set $dev "dst${IP6}_min $DST_MIN"
72 pg_set $dev "dst${IP6}_max $DST_MAX"
73
74 if [ -n "$DST_PORT" ]; then
75 # Single destination port or random port range
76 pg_set $dev "flag UDPDST_RND"
77 pg_set $dev "udp_dst_min $UDP_DST_MIN"
78 pg_set $dev "udp_dst_max $UDP_DST_MAX"
79 fi
80
81 [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
82
83 # Setup random UDP port src range
84 pg_set $dev "flag UDPSRC_RND"
85 pg_set $dev "udp_src_min $UDP_SRC_MIN"
86 pg_set $dev "udp_src_max $UDP_SRC_MAX"
87done
88
89# Run if user hits control-c
90function print_result() {
91 # Print results
92 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
93 dev=${DEV}@${thread}
94 echo "Device: $dev"
95 cat /proc/net/pktgen/$dev | grep -A2 "Result:"
96 done
97}
98# trap keyboard interrupt (Ctrl-C)
99trap true SIGINT
100
101if [ -z "$APPEND" ]; then
102 # start_run
103 echo "Running... ctrl^C to stop" >&2
104 pg_ctrl "start"
105 echo "Done" >&2
106
107 print_result
108else
109 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
110fi