mirror of https://gitee.com/openkylin/linux.git
docs: networking: convert pktgen.txt to ReST
- add SPDX header; - adjust title markup; - use bold markups on a few places; - mark code blocks and literals as such; - adjust identation, whitespaces and blank lines where needed; - add to networking/index.rst. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mauro Carvalho Chehab
David S. Miller
parent
6e94eaaa40
commit
c1e4535f24
|
|
@ -91,6 +91,7 @@ Contents:
|
|||
operstates
|
||||
packet_mmap
|
||||
phonet
|
||||
pktgen
|
||||
|
||||
.. only:: subproject and html
|
||||
|
||||
|
|
|
|||
|
|
@ -1,7 +1,8 @@
|
|||
.. SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
|
||||
HOWTO for the linux packet generator
|
||||
------------------------------------
|
||||
====================================
|
||||
HOWTO for the linux packet generator
|
||||
====================================
|
||||
|
||||
Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
|
||||
or as a module. A module is preferred; modprobe pktgen if needed. Once
|
||||
|
|
@ -9,17 +10,18 @@ running, pktgen creates a thread for each CPU with affinity to that CPU.
|
|||
Monitoring and controlling is done via /proc. It is easiest to select a
|
||||
suitable sample script and configure that.
|
||||
|
||||
On a dual CPU:
|
||||
On a dual CPU::
|
||||
|
||||
ps aux | grep pkt
|
||||
root 129 0.3 0.0 0 0 ? SW 2003 523:20 [kpktgend_0]
|
||||
root 130 0.3 0.0 0 0 ? SW 2003 509:50 [kpktgend_1]
|
||||
ps aux | grep pkt
|
||||
root 129 0.3 0.0 0 0 ? SW 2003 523:20 [kpktgend_0]
|
||||
root 130 0.3 0.0 0 0 ? SW 2003 509:50 [kpktgend_1]
|
||||
|
||||
|
||||
For monitoring and control pktgen creates:
|
||||
For monitoring and control pktgen creates::
|
||||
|
||||
/proc/net/pktgen/pgctrl
|
||||
/proc/net/pktgen/kpktgend_X
|
||||
/proc/net/pktgen/ethX
|
||||
/proc/net/pktgen/ethX
|
||||
|
||||
|
||||
Tuning NIC for max performance
|
||||
|
|
@ -28,7 +30,8 @@ Tuning NIC for max performance
|
|||
The default NIC settings are (likely) not tuned for pktgen's artificial
|
||||
overload type of benchmarking, as this could hurt the normal use-case.
|
||||
|
||||
Specifically increasing the TX ring buffer in the NIC:
|
||||
Specifically increasing the TX ring buffer in the NIC::
|
||||
|
||||
# ethtool -G ethX tx 1024
|
||||
|
||||
A larger TX ring can improve pktgen's performance, while it can hurt
|
||||
|
|
@ -46,7 +49,8 @@ This cleanup issue is specifically the case for the driver ixgbe
|
|||
and the cleanup interval is affected by the ethtool --coalesce setting
|
||||
of parameter "rx-usecs".
|
||||
|
||||
For ixgbe use e.g. "30" resulting in approx 33K interrupts/sec (1/30*10^6):
|
||||
For ixgbe use e.g. "30" resulting in approx 33K interrupts/sec (1/30*10^6)::
|
||||
|
||||
# ethtool -C ethX rx-usecs 30
|
||||
|
||||
|
||||
|
|
@ -55,7 +59,7 @@ Kernel threads
|
|||
Pktgen creates a thread for each CPU with affinity to that CPU.
|
||||
Which is controlled through procfile /proc/net/pktgen/kpktgend_X.
|
||||
|
||||
Example: /proc/net/pktgen/kpktgend_0
|
||||
Example: /proc/net/pktgen/kpktgend_0::
|
||||
|
||||
Running:
|
||||
Stopped: eth4@0
|
||||
|
|
@ -64,6 +68,7 @@ Example: /proc/net/pktgen/kpktgend_0
|
|||
Most important are the devices assigned to the thread.
|
||||
|
||||
The two basic thread commands are:
|
||||
|
||||
* add_device DEVICE@NAME -- adds a single device
|
||||
* rem_device_all -- remove all associated devices
|
||||
|
||||
|
|
@ -73,7 +78,7 @@ be unique.
|
|||
|
||||
To support adding the same device to multiple threads, which is useful
|
||||
with multi queue NICs, the device naming scheme is extended with "@":
|
||||
device@something
|
||||
device@something
|
||||
|
||||
The part after "@" can be anything, but it is custom to use the thread
|
||||
number.
|
||||
|
|
@ -83,30 +88,30 @@ Viewing devices
|
|||
|
||||
The Params section holds configured information. The Current section
|
||||
holds running statistics. The Result is printed after a run or after
|
||||
interruption. Example:
|
||||
interruption. Example::
|
||||
|
||||
/proc/net/pktgen/eth4@0
|
||||
/proc/net/pktgen/eth4@0
|
||||
|
||||
Params: count 100000 min_pkt_size: 60 max_pkt_size: 60
|
||||
frags: 0 delay: 0 clone_skb: 64 ifname: eth4@0
|
||||
flows: 0 flowlen: 0
|
||||
queue_map_min: 0 queue_map_max: 0
|
||||
dst_min: 192.168.81.2 dst_max:
|
||||
src_min: src_max:
|
||||
src_mac: 90:e2:ba:0a:56:b4 dst_mac: 00:1b:21:3c:9d:f8
|
||||
udp_src_min: 9 udp_src_max: 109 udp_dst_min: 9 udp_dst_max: 9
|
||||
src_mac_count: 0 dst_mac_count: 0
|
||||
Flags: UDPSRC_RND NO_TIMESTAMP QUEUE_MAP_CPU
|
||||
Current:
|
||||
pkts-sofar: 100000 errors: 0
|
||||
started: 623913381008us stopped: 623913396439us idle: 25us
|
||||
seq_num: 100001 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
|
||||
cur_saddr: 192.168.8.3 cur_daddr: 192.168.81.2
|
||||
cur_udp_dst: 9 cur_udp_src: 42
|
||||
cur_queue_map: 0
|
||||
flows: 0
|
||||
Result: OK: 15430(c15405+d25) usec, 100000 (60byte,0frags)
|
||||
6480562pps 3110Mb/sec (3110669760bps) errors: 0
|
||||
Params: count 100000 min_pkt_size: 60 max_pkt_size: 60
|
||||
frags: 0 delay: 0 clone_skb: 64 ifname: eth4@0
|
||||
flows: 0 flowlen: 0
|
||||
queue_map_min: 0 queue_map_max: 0
|
||||
dst_min: 192.168.81.2 dst_max:
|
||||
src_min: src_max:
|
||||
src_mac: 90:e2:ba:0a:56:b4 dst_mac: 00:1b:21:3c:9d:f8
|
||||
udp_src_min: 9 udp_src_max: 109 udp_dst_min: 9 udp_dst_max: 9
|
||||
src_mac_count: 0 dst_mac_count: 0
|
||||
Flags: UDPSRC_RND NO_TIMESTAMP QUEUE_MAP_CPU
|
||||
Current:
|
||||
pkts-sofar: 100000 errors: 0
|
||||
started: 623913381008us stopped: 623913396439us idle: 25us
|
||||
seq_num: 100001 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
|
||||
cur_saddr: 192.168.8.3 cur_daddr: 192.168.81.2
|
||||
cur_udp_dst: 9 cur_udp_src: 42
|
||||
cur_queue_map: 0
|
||||
flows: 0
|
||||
Result: OK: 15430(c15405+d25) usec, 100000 (60byte,0frags)
|
||||
6480562pps 3110Mb/sec (3110669760bps) errors: 0
|
||||
|
||||
|
||||
Configuring devices
|
||||
|
|
@ -114,11 +119,12 @@ Configuring devices
|
|||
This is done via the /proc interface, and most easily done via pgset
|
||||
as defined in the sample scripts.
|
||||
You need to specify PGDEV environment variable to use functions from sample
|
||||
scripts, i.e.:
|
||||
export PGDEV=/proc/net/pktgen/eth4@0
|
||||
source samples/pktgen/functions.sh
|
||||
scripts, i.e.::
|
||||
|
||||
Examples:
|
||||
export PGDEV=/proc/net/pktgen/eth4@0
|
||||
source samples/pktgen/functions.sh
|
||||
|
||||
Examples::
|
||||
|
||||
pg_ctrl start starts injection.
|
||||
pg_ctrl stop aborts injection. Also, ^C aborts generator.
|
||||
|
|
@ -126,17 +132,17 @@ Examples:
|
|||
pgset "clone_skb 1" sets the number of copies of the same packet
|
||||
pgset "clone_skb 0" use single SKB for all transmits
|
||||
pgset "burst 8" uses xmit_more API to queue 8 copies of the same
|
||||
packet and update HW tx queue tail pointer once.
|
||||
"burst 1" is the default
|
||||
packet and update HW tx queue tail pointer once.
|
||||
"burst 1" is the default
|
||||
pgset "pkt_size 9014" sets packet size to 9014
|
||||
pgset "frags 5" packet will consist of 5 fragments
|
||||
pgset "count 200000" sets number of packets to send, set to zero
|
||||
for continuous sends until explicitly stopped.
|
||||
for continuous sends until explicitly stopped.
|
||||
|
||||
pgset "delay 5000" adds delay to hard_start_xmit(). nanoseconds
|
||||
|
||||
pgset "dst 10.0.0.1" sets IP destination address
|
||||
(BEWARE! This generator is very aggressive!)
|
||||
(BEWARE! This generator is very aggressive!)
|
||||
|
||||
pgset "dst_min 10.0.0.1" Same as dst
|
||||
pgset "dst_max 10.0.0.254" Set the maximum destination IP.
|
||||
|
|
@ -149,46 +155,46 @@ Examples:
|
|||
|
||||
pgset "queue_map_min 0" Sets the min value of tx queue interval
|
||||
pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices
|
||||
To select queue 1 of a given device,
|
||||
use queue_map_min=1 and queue_map_max=1
|
||||
To select queue 1 of a given device,
|
||||
use queue_map_min=1 and queue_map_max=1
|
||||
|
||||
pgset "src_mac_count 1" Sets the number of MACs we'll range through.
|
||||
The 'minimum' MAC is what you set with srcmac.
|
||||
The 'minimum' MAC is what you set with srcmac.
|
||||
|
||||
pgset "dst_mac_count 1" Sets the number of MACs we'll range through.
|
||||
The 'minimum' MAC is what you set with dstmac.
|
||||
The 'minimum' MAC is what you set with dstmac.
|
||||
|
||||
pgset "flag [name]" Set a flag to determine behaviour. Current flags
|
||||
are: IPSRC_RND # IP source is random (between min/max)
|
||||
IPDST_RND # IP destination is random
|
||||
UDPSRC_RND, UDPDST_RND,
|
||||
MACSRC_RND, MACDST_RND
|
||||
TXSIZE_RND, IPV6,
|
||||
MPLS_RND, VID_RND, SVID_RND
|
||||
FLOW_SEQ,
|
||||
QUEUE_MAP_RND # queue map random
|
||||
QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
|
||||
UDPCSUM,
|
||||
IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
|
||||
NODE_ALLOC # node specific memory allocation
|
||||
NO_TIMESTAMP # disable timestamping
|
||||
are: IPSRC_RND # IP source is random (between min/max)
|
||||
IPDST_RND # IP destination is random
|
||||
UDPSRC_RND, UDPDST_RND,
|
||||
MACSRC_RND, MACDST_RND
|
||||
TXSIZE_RND, IPV6,
|
||||
MPLS_RND, VID_RND, SVID_RND
|
||||
FLOW_SEQ,
|
||||
QUEUE_MAP_RND # queue map random
|
||||
QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
|
||||
UDPCSUM,
|
||||
IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
|
||||
NODE_ALLOC # node specific memory allocation
|
||||
NO_TIMESTAMP # disable timestamping
|
||||
pgset 'flag ![name]' Clear a flag to determine behaviour.
|
||||
Note that you might need to use single quote in
|
||||
interactive mode, so that your shell wouldn't expand
|
||||
the specified flag as a history command.
|
||||
Note that you might need to use single quote in
|
||||
interactive mode, so that your shell wouldn't expand
|
||||
the specified flag as a history command.
|
||||
|
||||
pgset "spi [SPI_VALUE]" Set specific SA used to transform packet.
|
||||
|
||||
pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
|
||||
cycle through the port range.
|
||||
cycle through the port range.
|
||||
|
||||
pgset "udp_src_max 9" set UDP source port max.
|
||||
pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
|
||||
cycle through the port range.
|
||||
cycle through the port range.
|
||||
pgset "udp_dst_max 9" set UDP destination port max.
|
||||
|
||||
pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
|
||||
outer label=16,middle label=32,
|
||||
outer label=16,middle label=32,
|
||||
inner label=0 (IPv4 NULL)) Note that
|
||||
there must be no spaces between the
|
||||
arguments. Leading zeros are required.
|
||||
|
|
@ -232,10 +238,14 @@ A collection of tutorial scripts and helpers for pktgen is in the
|
|||
samples/pktgen directory. The helper parameters.sh file support easy
|
||||
and consistent parameter parsing across the sample scripts.
|
||||
|
||||
Usage example and help:
|
||||
Usage example and help::
|
||||
|
||||
./pktgen_sample01_simple.sh -i eth4 -m 00:1B:21:3C:9D:F8 -d 192.168.8.2
|
||||
|
||||
Usage: ./pktgen_sample01_simple.sh [-vx] -i ethX
|
||||
Usage:::
|
||||
|
||||
./pktgen_sample01_simple.sh [-vx] -i ethX
|
||||
|
||||
-i : ($DEV) output interface/device (required)
|
||||
-s : ($PKT_SIZE) packet size
|
||||
-d : ($DEST_IP) destination IP
|
||||
|
|
@ -250,13 +260,13 @@ The global variables being set are also listed. E.g. the required
|
|||
interface/device parameter "-i" sets variable $DEV. Copy the
|
||||
pktgen_sampleXX scripts and modify them to fit your own needs.
|
||||
|
||||
The old scripts:
|
||||
The old scripts::
|
||||
|
||||
pktgen.conf-1-2 # 1 CPU 2 dev
|
||||
pktgen.conf-1-1-rdos # 1 CPU 1 dev w. route DoS
|
||||
pktgen.conf-1-1-ip6 # 1 CPU 1 dev ipv6
|
||||
pktgen.conf-1-1-ip6-rdos # 1 CPU 1 dev ipv6 w. route DoS
|
||||
pktgen.conf-1-1-flows # 1 CPU 1 dev multiple flows.
|
||||
pktgen.conf-1-2 # 1 CPU 2 dev
|
||||
pktgen.conf-1-1-rdos # 1 CPU 1 dev w. route DoS
|
||||
pktgen.conf-1-1-ip6 # 1 CPU 1 dev ipv6
|
||||
pktgen.conf-1-1-ip6-rdos # 1 CPU 1 dev ipv6 w. route DoS
|
||||
pktgen.conf-1-1-flows # 1 CPU 1 dev multiple flows.
|
||||
|
||||
|
||||
Interrupt affinity
|
||||
|
|
@ -271,10 +281,10 @@ to the running threads CPU (directly from smp_processor_id()).
|
|||
Enable IPsec
|
||||
============
|
||||
Default IPsec transformation with ESP encapsulation plus transport mode
|
||||
can be enabled by simply setting:
|
||||
can be enabled by simply setting::
|
||||
|
||||
pgset "flag IPSEC"
|
||||
pgset "flows 1"
|
||||
pgset "flag IPSEC"
|
||||
pgset "flows 1"
|
||||
|
||||
To avoid breaking existing testbed scripts for using AH type and tunnel mode,
|
||||
you can use "pgset spi SPI_VALUE" to specify which transformation mode
|
||||
|
|
@ -284,115 +294,117 @@ to employ.
|
|||
Current commands and configuration options
|
||||
==========================================
|
||||
|
||||
** Pgcontrol commands:
|
||||
**Pgcontrol commands**::
|
||||
|
||||
start
|
||||
stop
|
||||
reset
|
||||
start
|
||||
stop
|
||||
reset
|
||||
|
||||
** Thread commands:
|
||||
**Thread commands**::
|
||||
|
||||
add_device
|
||||
rem_device_all
|
||||
add_device
|
||||
rem_device_all
|
||||
|
||||
|
||||
** Device commands:
|
||||
**Device commands**::
|
||||
|
||||
count
|
||||
clone_skb
|
||||
burst
|
||||
debug
|
||||
count
|
||||
clone_skb
|
||||
burst
|
||||
debug
|
||||
|
||||
frags
|
||||
delay
|
||||
frags
|
||||
delay
|
||||
|
||||
src_mac_count
|
||||
dst_mac_count
|
||||
src_mac_count
|
||||
dst_mac_count
|
||||
|
||||
pkt_size
|
||||
min_pkt_size
|
||||
max_pkt_size
|
||||
pkt_size
|
||||
min_pkt_size
|
||||
max_pkt_size
|
||||
|
||||
queue_map_min
|
||||
queue_map_max
|
||||
skb_priority
|
||||
queue_map_min
|
||||
queue_map_max
|
||||
skb_priority
|
||||
|
||||
tos (ipv4)
|
||||
traffic_class (ipv6)
|
||||
tos (ipv4)
|
||||
traffic_class (ipv6)
|
||||
|
||||
mpls
|
||||
mpls
|
||||
|
||||
udp_src_min
|
||||
udp_src_max
|
||||
udp_src_min
|
||||
udp_src_max
|
||||
|
||||
udp_dst_min
|
||||
udp_dst_max
|
||||
udp_dst_min
|
||||
udp_dst_max
|
||||
|
||||
node
|
||||
node
|
||||
|
||||
flag
|
||||
IPSRC_RND
|
||||
IPDST_RND
|
||||
UDPSRC_RND
|
||||
UDPDST_RND
|
||||
MACSRC_RND
|
||||
MACDST_RND
|
||||
TXSIZE_RND
|
||||
IPV6
|
||||
MPLS_RND
|
||||
VID_RND
|
||||
SVID_RND
|
||||
FLOW_SEQ
|
||||
QUEUE_MAP_RND
|
||||
QUEUE_MAP_CPU
|
||||
UDPCSUM
|
||||
IPSEC
|
||||
NODE_ALLOC
|
||||
NO_TIMESTAMP
|
||||
flag
|
||||
IPSRC_RND
|
||||
IPDST_RND
|
||||
UDPSRC_RND
|
||||
UDPDST_RND
|
||||
MACSRC_RND
|
||||
MACDST_RND
|
||||
TXSIZE_RND
|
||||
IPV6
|
||||
MPLS_RND
|
||||
VID_RND
|
||||
SVID_RND
|
||||
FLOW_SEQ
|
||||
QUEUE_MAP_RND
|
||||
QUEUE_MAP_CPU
|
||||
UDPCSUM
|
||||
IPSEC
|
||||
NODE_ALLOC
|
||||
NO_TIMESTAMP
|
||||
|
||||
spi (ipsec)
|
||||
spi (ipsec)
|
||||
|
||||
dst_min
|
||||
dst_max
|
||||
dst_min
|
||||
dst_max
|
||||
|
||||
src_min
|
||||
src_max
|
||||
src_min
|
||||
src_max
|
||||
|
||||
dst_mac
|
||||
src_mac
|
||||
dst_mac
|
||||
src_mac
|
||||
|
||||
clear_counters
|
||||
clear_counters
|
||||
|
||||
src6
|
||||
dst6
|
||||
dst6_max
|
||||
dst6_min
|
||||
src6
|
||||
dst6
|
||||
dst6_max
|
||||
dst6_min
|
||||
|
||||
flows
|
||||
flowlen
|
||||
flows
|
||||
flowlen
|
||||
|
||||
rate
|
||||
ratep
|
||||
rate
|
||||
ratep
|
||||
|
||||
xmit_mode <start_xmit|netif_receive>
|
||||
xmit_mode <start_xmit|netif_receive>
|
||||
|
||||
vlan_cfi
|
||||
vlan_id
|
||||
vlan_p
|
||||
vlan_cfi
|
||||
vlan_id
|
||||
vlan_p
|
||||
|
||||
svlan_cfi
|
||||
svlan_id
|
||||
svlan_p
|
||||
svlan_cfi
|
||||
svlan_id
|
||||
svlan_p
|
||||
|
||||
|
||||
References:
|
||||
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
|
||||
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/
|
||||
|
||||
- ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
|
||||
- tp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/
|
||||
|
||||
Paper from Linux-Kongress in Erlangen 2004.
|
||||
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
|
||||
- ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
|
||||
|
||||
Thanks to:
|
||||
|
||||
Grant Grundler for testing on IA-64 and parisc, Harald Welte, Lennert Buytenhek
|
||||
Stephen Hemminger, Andi Kleen, Dave Miller and many others.
|
||||
|
||||
|
|
@ -344,7 +344,7 @@ config NET_PKTGEN
|
|||
what was just said, you don't need it: say N.
|
||||
|
||||
Documentation on how to use the packet generator can be found
|
||||
at <file:Documentation/networking/pktgen.txt>.
|
||||
at <file:Documentation/networking/pktgen.rst>.
|
||||
|
||||
To compile this code as a module, choose M here: the
|
||||
module will be called pktgen.
|
||||
|
|
|
|||
|
|
@ -56,7 +56,7 @@
|
|||
* Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
|
||||
*
|
||||
* 021124 Finished major redesign and rewrite for new functionality.
|
||||
* See Documentation/networking/pktgen.txt for how to use this.
|
||||
* See Documentation/networking/pktgen.rst for how to use this.
|
||||
*
|
||||
* The new operation:
|
||||
* For each CPU one thread/process is created at start. This process checks
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@ Sample and benchmark scripts for pktgen (packet generator)
|
|||
This directory contains some pktgen sample and benchmark scripts, that
|
||||
can easily be copied and adjusted for your own use-case.
|
||||
|
||||
General doc is located in kernel: Documentation/networking/pktgen.txt
|
||||
General doc is located in kernel: Documentation/networking/pktgen.rst
|
||||
|
||||
Helper include files
|
||||
====================
|
||||
|
|
|
|||
Loading…
Reference in New Issue