pktgen使用文档文档格式.docx
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[root@localhostpktgen]#ifconfigeth1
eth5Linkencap:
EthernetHWaddr00:
0C:
29:
97:
9B:
B4
inetaddr:
192.168.1.95Bcast:
192.168.1.255Mask:
255.255.255.0
inet6addr:
fe80:
:
20c:
29ff:
fe97:
9bb4/64Scope:
Link
UPBROADCASTRUNNINGMULTICASTMTU:
1500Metric:
RXpackets:
15044140errors:
0dropped:
0overruns:
0frame:
TXpackets:
14210498errors:
0carrier:
collisions:
0txqueuelen:
1000
RXbytes:
903846363（861.9MiB）TXbytes:
852636332（813.1MiB）
[root@localhostpktgen]#
ifconfigeth2
eth6Linkencap:
BE
192.168.1.96Bcast:
9bbe/64Scope:
14256340errors:
14998657errors:
856589260（816.9MiB）TXbytes:
899925597（858.2MiB）
ethtooleth1
Settings
foreth5:
Supportedports:
[TP]
Supportedlinkmodes:
10baseT/Half10baseT/Full
100baseT/Half100baseT/Full
1000baseT/Full
Supportsauto-negotiation:
Yes
Advertisedlinkmodes:
1000baseT/Full
Advertisedpauseframeuse:
No
Advertisedauto-negotiation:
Speed:
1000Mb/s
Duplex:
Full
Port:
TwistedPair
PHYAD:
Transceiver:
internal
Auto-negotiation:
on
MDI-X:
Unknown
SupportsWake-on:
d
Wake-on:
Currentmessagelevel:
0x00000007（7）
Linkdetected:
yes
ethtooleth2
foreth6:
[root@localhostpktgen]#
步骤2）查看两个网口的中断号，并把eth1/eth2做亲和性绑定到特定的cpu.
注意:
先关闭系统的irqbalance服务
[root@localhost~]#
cat/proc/interrupts|grepeth
16:
258654013515884172554IO-APIC-fasteoiEnsoniqAudioPCI,eth1
19:
51171949714609806040IO-APIC-fasteoieth4,eth2
#说明:
16和19表示的是eth1和eth2的中断号
/etc/init.d/irqbalancestop
Stoppingirqbalance:
[OK]
#使用上面的命令停止irqbalance服务后,下面的语句就是绑定特定的cpu了:
cpu的值对应关系如下:
BinaryHex
CPU0000000011
CPU1000000102
CPU2000001004
CPU3000010008
例如:
如果我想把IRQ绑定到CPU2上就是00000100＝4：
echo4>
/proc/irq/19/smp_affinity
[root@localhost~]#echo8>
/proc/irq/16/smp_affinity
[root@localhost~]#cat/proc/irq/19/smp_affinity
04
[root@localhost~]#cat/proc/irq/16/smp_affinity
08
步骤3）在PC机上运行pktgen测试脚本:
脚本1:
2个网口（eth1/eth2））双向对发脚本.（即GWN7000的LAN1和LAN5之间双向对发数据测试）
#!
/bin/sh
#FileName:
pktgen-eth1-eth2.conf
#modprobepktgen
pgset（）{
localresult
echo$1>
$PGDEV
result=`cat$PGDEV|fgrep"
Result:
OK:
"
`
if["
$result"
="
];
then
cat$PGDEV|fgrepResult:
fi
}
pg（）{
echoinject>
cat$PGDEV
#ConfigStartHere-----------------------------------------------------------
#threadconfig
#EachCPUhasownthread.TwoCPUexammple.Weaddeth1,eth2respectivly.
PGDEV=/proc/net/pktgen/kpktgend_2
echo"
Removingalldevices"
pgset"
rem_device_all"
Addingeth1"
add_deviceeth1"
PGDEV=/proc/net/pktgen/kpktgend_3
Addingeth2"
add_deviceeth2"
#deviceconfig
#delay0meansmaximumspeed.
CLONE_SKB="
clone_skb1000000"
#NICadds4bytesCRC
PKT_SIZE="
pkt_size60"
#COUNT0meansforever
#COUNT="
count0"
COUNT="
DELAY="
delay0"
PGDEV=/proc/net/pktgen/eth1
Configuring$PGDEV"
$COUNT"
$CLONE_SKB"
$PKT_SIZE"
$DELAY"
dst192.168.12.166"
dst_mac2c:
53:
4a:
01:
13:
19"
PGDEV=/proc/net/pktgen/eth2
dst192.168.12.165"
18"
#Timetorun
PGDEV=/proc/net/pktgen/pgctrl
Running...ctrl^Ctostop"
start"
Done"
#Resultcanbevievedin/proc/net/pktgen/eth[1,2]
脚本2:
2个网口之间单向发送测试脚本.（即GWN7000的LAN1向LAN5发数据测试）
PGDEV=/proc/net/pktgen/kpktgend_0
dst192.168.1.166"
步骤4）执行pktgen测试脚本的同时，查看发/收数据.
将脚本保存到文件pktgen-eth1-eth2.sh中.
[root@localhostpktgen]#./pktgen-eth1-eth2.sh
Removingalldevices
Addingeth
Addingeth6
Configuring/proc/net/pktgen/eth5
Configuring/proc/net/pktgen/eth6
Running...ctrl^Ctostop
另开一个终端，执行mpstat命令查看cpu占用率，看网卡中断的处理是否正常：
mpstat-P2,31
Linux2.6.38.8（localhost.localdomain）01/15/2012_x86_64_（4CPU）
09:
16AMCPU%usr%nice%sys%iowait%irq%soft%steal%guest%idle
17AM20.000.0086.870.000.0013.130.000.000.00
17AM30.000.0074.230.000.0025.770.000.000.00
18AM20.000.0087.630.000.0012.370.000.000.00
18AM30.000.0076.530.000.0023.470.000.000.00
19AM20.000.0085.710.000.0014.290.000.000.00
19AM30.000.0075.510.000.0024.490.000.000.00
20AM20.000.0086.600.000.0013.400.000.000.00
20AM30.000.0070.100.000.0029.900.000.000.00
^C
sar-nDEV2
[root@localhost~]#
执行一段时间后看统计数据：
[root@localhostpktgen]#cat/proc/net/pktgen/eth5
Params:
count0min_pkt_size:
60max_pkt_size:
60
frags:
0delay:
0clone_skb:
1000000ifname:
eth5
flows:
0flowlen:
queue_map_min:
0queue_map_max:
dst_min:
192.168.1.96dst_max:
src_min:
src_max:
src_mac:
00:
0c:
9b:
b4dst_mac:
be
udp_src_min:
9udp_src_max:
9udp_dst_min:
9udp_dst_max:
9
src_mac_count:
0dst_mac_count:
Flags:
Current:
pkts-sofar:
4405203errors:
started:
2423250036usstopped:
2570673239usidle:
61432us
seq_num:
4405204cur_dst_mac_offset:
0cur_src_mac_offset:
cur_saddr:
0x5f01a8c0cur_daddr:
0x6001a8c0
cur_udp_dst:
9cur_udp_src:
cur_queue_map:
147423202（c147361769+d61432）usec,4405203（60byte,0frags）
29881pps14Mb/sec（14342880bps）errors:
cat/proc/net/pktgen/eth6
eth6
192.168.1.95dst_max:
bedst_mac:
b4
2846965errors:
2423223982usstopped:
2570673243usidle:
45963us
2846966cur_dst_mac_offset:
0x6001a8c0cur
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