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Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2
3 HOWTO for the linux packet generator
4 ------------------------------------
5
6Date: 041221
7
8Enable CONFIG_NET_PKTGEN to compile and build pktgen.o either in kernel
9or as module. Module is preferred. insmod pktgen if needed. Once running
Matt LaPlante3f6dee92006-10-03 22:45:33 +020010pktgen creates a thread on each CPU where each thread has affinity to its CPU.
Linus Torvalds1da177e2005-04-16 15:20:36 -070011Monitoring and controlling is done via /proc. Easiest to select a suitable
12a sample script and configure.
13
14On a dual CPU:
15
16ps aux | grep pkt
17root 129 0.3 0.0 0 0 ? SW 2003 523:20 [pktgen/0]
18root 130 0.3 0.0 0 0 ? SW 2003 509:50 [pktgen/1]
19
20
Matt LaPlante2fe0ae72006-10-03 22:50:39 +020021For monitoring and control pktgen creates:
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 /proc/net/pktgen/pgctrl
23 /proc/net/pktgen/kpktgend_X
24 /proc/net/pktgen/ethX
25
26
27Viewing threads
28===============
29/proc/net/pktgen/kpktgend_0
30Name: kpktgend_0 max_before_softirq: 10000
31Running:
32Stopped: eth1
33Result: OK: max_before_softirq=10000
34
Matt LaPlante3f6dee92006-10-03 22:45:33 +020035Most important the devices assigned to thread. Note! A device can only belong
Linus Torvalds1da177e2005-04-16 15:20:36 -070036to one thread.
37
38
39Viewing devices
40===============
41
42Parm section holds configured info. Current hold running stats.
43Result is printed after run or after interruption. Example:
44
45/proc/net/pktgen/eth1
46
47Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60
48 frags: 0 delay: 0 clone_skb: 1000000 ifname: eth1
49 flows: 0 flowlen: 0
50 dst_min: 10.10.11.2 dst_max:
51 src_min: src_max:
52 src_mac: 00:00:00:00:00:00 dst_mac: 00:04:23:AC:FD:82
53 udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9
54 src_mac_count: 0 dst_mac_count: 0
55 Flags:
56Current:
57 pkts-sofar: 10000000 errors: 39664
58 started: 1103053986245187us stopped: 1103053999346329us idle: 880401us
59 seq_num: 10000011 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
60 cur_saddr: 0x10a0a0a cur_daddr: 0x20b0a0a
61 cur_udp_dst: 9 cur_udp_src: 9
62 flows: 0
63Result: OK: 13101142(c12220741+d880401) usec, 10000000 (60byte,0frags)
64 763292pps 390Mb/sec (390805504bps) errors: 39664
65
Matt LaPlante5d3f0832006-11-30 05:21:10 +010066Configuring threads and devices
67================================
Linus Torvalds1da177e2005-04-16 15:20:36 -070068This is done via the /proc interface easiest done via pgset in the scripts
69
70Examples:
71
72 pgset "clone_skb 1" sets the number of copies of the same packet
73 pgset "clone_skb 0" use single SKB for all transmits
74 pgset "pkt_size 9014" sets packet size to 9014
75 pgset "frags 5" packet will consist of 5 fragments
76 pgset "count 200000" sets number of packets to send, set to zero
Adrian Bunkd0f19d82006-06-30 18:28:43 +020077 for continuous sends until explicitly stopped.
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 pgset "delay 5000" adds delay to hard_start_xmit(). nanoseconds
80
81 pgset "dst 10.0.0.1" sets IP destination address
82 (BEWARE! This generator is very aggressive!)
83
84 pgset "dst_min 10.0.0.1" Same as dst
85 pgset "dst_max 10.0.0.254" Set the maximum destination IP.
86 pgset "src_min 10.0.0.1" Set the minimum (or only) source IP.
87 pgset "src_max 10.0.0.254" Set the maximum source IP.
88 pgset "dst6 fec0::1" IPV6 destination address
89 pgset "src6 fec0::2" IPV6 source address
90 pgset "dstmac 00:00:00:00:00:00" sets MAC destination address
91 pgset "srcmac 00:00:00:00:00:00" sets MAC source address
92
Eric Dumazet896a7cf2009-10-02 20:24:59 +000093 pgset "queue_map_min 0" Sets the min value of tx queue interval
94 pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices
95 To select queue 1 of a given device,
96 use queue_map_min=1 and queue_map_max=1
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 pgset "src_mac_count 1" Sets the number of MACs we'll range through.
99 The 'minimum' MAC is what you set with srcmac.
100
101 pgset "dst_mac_count 1" Sets the number of MACs we'll range through.
102 The 'minimum' MAC is what you set with dstmac.
103
104 pgset "flag [name]" Set a flag to determine behaviour. Current flags
105 are: IPSRC_RND #IP Source is random (between min/max),
106 IPDST_RND, UDPSRC_RND,
107 UDPDST_RND, MACSRC_RND, MACDST_RND
Francesco Fondellif0e82fd2006-09-27 16:33:05 -0700108 MPLS_RND, VID_RND, SVID_RND
Eric Dumazet896a7cf2009-10-02 20:24:59 +0000109 QUEUE_MAP_RND # queue map random
110 QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
114 cycle through the port range.
115
116 pgset "udp_src_max 9" set UDP source port max.
117 pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
118 cycle through the port range.
119 pgset "udp_dst_max 9" set UDP destination port max.
120
Steven Whitehouseca6549a2006-03-23 01:10:26 -0800121 pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
122 outer label=16,middle label=32,
123 inner label=0 (IPv4 NULL)) Note that
124 there must be no spaces between the
125 arguments. Leading zeros are required.
126 Do not set the bottom of stack bit,
Matt LaPlantefa00e7e2006-11-30 04:55:36 +0100127 that's done automatically. If you do
Steven Whitehouseca6549a2006-03-23 01:10:26 -0800128 set the bottom of stack bit, that
129 indicates that you want to randomly
130 generate that address and the flag
131 MPLS_RND will be turned on. You
132 can have any mix of random and fixed
133 labels in the label stack.
134
135 pgset "mpls 0" turn off mpls (or any invalid argument works too!)
136
Francesco Fondellif0e82fd2006-09-27 16:33:05 -0700137 pgset "vlan_id 77" set VLAN ID 0-4095
138 pgset "vlan_p 3" set priority bit 0-7 (default 0)
139 pgset "vlan_cfi 0" set canonical format identifier 0-1 (default 0)
140
141 pgset "svlan_id 22" set SVLAN ID 0-4095
142 pgset "svlan_p 3" set priority bit 0-7 (default 0)
143 pgset "svlan_cfi 0" set canonical format identifier 0-1 (default 0)
144
145 pgset "vlan_id 9999" > 4095 remove vlan and svlan tags
146 pgset "svlan 9999" > 4095 remove svlan tag
147
148
149 pgset "tos XX" set former IPv4 TOS field (e.g. "tos 28" for AF11 no ECN, default 00)
150 pgset "traffic_class XX" set former IPv6 TRAFFIC CLASS (e.g. "traffic_class B8" for EF no ECN, default 00)
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 pgset stop aborts injection. Also, ^C aborts generator.
153
Daniel Turull43d28b62010-06-09 22:49:57 +0000154 pgset "rate 300M" set rate to 300 Mb/s
155 pgset "ratep 1000000" set rate to 1Mpps
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157Example scripts
158===============
159
Matt LaPlantefff92892006-10-03 22:47:42 +0200160A collection of small tutorial scripts for pktgen is in examples dir.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162pktgen.conf-1-1 # 1 CPU 1 dev
163pktgen.conf-1-2 # 1 CPU 2 dev
164pktgen.conf-2-1 # 2 CPU's 1 dev
165pktgen.conf-2-2 # 2 CPU's 2 dev
166pktgen.conf-1-1-rdos # 1 CPU 1 dev w. route DoS
167pktgen.conf-1-1-ip6 # 1 CPU 1 dev ipv6
168pktgen.conf-1-1-ip6-rdos # 1 CPU 1 dev ipv6 w. route DoS
169pktgen.conf-1-1-flows # 1 CPU 1 dev multiple flows.
170
171Run in shell: ./pktgen.conf-X-Y It does all the setup including sending.
172
173
174Interrupt affinity
175===================
176Note when adding devices to a specific CPU there good idea to also assign
177/proc/irq/XX/smp_affinity so the TX-interrupts gets bound to the same CPU.
178as this reduces cache bouncing when freeing skb's.
179
180
181Current commands and configuration options
182==========================================
183
184** Pgcontrol commands:
185
186start
187stop
188
189** Thread commands:
190
191add_device
192rem_device_all
193max_before_softirq
194
195
196** Device commands:
197
198count
199clone_skb
200debug
201
202frags
203delay
204
205src_mac_count
206dst_mac_count
207
208pkt_size
209min_pkt_size
210max_pkt_size
211
Steven Whitehouseca6549a2006-03-23 01:10:26 -0800212mpls
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214udp_src_min
215udp_src_max
216
217udp_dst_min
218udp_dst_max
219
220flag
221 IPSRC_RND
222 TXSIZE_RND
223 IPDST_RND
224 UDPSRC_RND
225 UDPDST_RND
226 MACSRC_RND
227 MACDST_RND
228
229dst_min
230dst_max
231
232src_min
233src_max
234
235dst_mac
236src_mac
237
238clear_counters
239
240dst6
241src6
242
243flows
244flowlen
245
Daniel Turull43d28b62010-06-09 22:49:57 +0000246rate
247ratep
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249References:
250ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
251ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/
252
253Paper from Linux-Kongress in Erlangen 2004.
254ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
255
256Thanks to:
257Grant Grundler for testing on IA-64 and parisc, Harald Welte, Lennert Buytenhek
258Stephen Hemminger, Andi Kleen, Dave Miller and many others.
259
260
Steven Whitehouseca6549a2006-03-23 01:10:26 -0800261Good luck with the linux net-development.