Iperf 用法

yum install iperf on centos5

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
rpm -K rpmforge-release-0.5.2-2.el5.rf.*.rpm
rpm -i rpmforge-release-0.5.2-2.el5.rf.*.rpm
yum install iperf


yum install iperf on centos6

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
rpm -K rpmforge-release-0.5.2-2.el6.rf.*.rpm
rpm -i rpmforge-release-0.5.2-2.el6.rf.*.rpm
yum install iperf
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Throughput Tests Using iperf

To see what the throughput differences would be like, I ran a bunch of iperf tests from a Debian guest.
Host Server Config

Tyan h2000M motherboard
2x dual-core Opteron 2220 CPUs @ 2.8 GHz
8 GB DDR2-667 ECC SDRAM (2x 2 GB sticks per CPU)
3Ware 9650SE-16ML SATA-II RAID Controller
12x 500 GB SATA-II harddrives in a single RAID-6 array
Intel PRO/1000-MT PCIe quad-port gigabit NIC (configured as 4-port bond0, used as the kvm bridge)
Debian Lenny installed, updated June 04, 2008, with kvm-69 and kernel 2.6.25 (kernel from Sid)

Guest VM Config

1 CPU
2 GB RAM
100 GB virtual harddrive (via LVM)
Debian Lenny with kernel 2.6.25 from Sid
/usr/bin/kvm -name mail -daemonize -localtime -usb -usbdevice tablet -smp 1 -m 1048 -vnc :04 -pidfile /var/run/kvm/mail.pid -net nic,macaddr=00:16:3e:00:00:04,model=virtio -net tap,ifname=tap04 -boot c -drive index=0,media=disk,if=virtio,boot=on,file=/dev/mapper/vol0-mail

iperf Server Config

iperf -s -w 65536 -p 12345 -I 5

iperf Client Configs

[1] iperf -c <server> -w 65536 -p 12345 -t 60
[2] iperf -c <server> -w 65536 -p 12345 -t 60 -d
[3] iperf -c <server> -w 65536 -p 12345 -t 60 -P 4

Results

These are averaged over 3 runs.

To the host (virtio)

[1] 92 Mbps

To a server connected to a gigabit port on the same switch (virtio)

[1] 834 Mbps
[2] 519 Mbps out, 531 Mbps in
[3] 906 Mbps combined

To a server connected to a gigabit port on the same switch (e1000)

[1] 296 Mbps
[2] 259 Mbps out, 62 Mbps in
[3] 302 Mbps combined

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10.112.252.1 / 27

255.255.255.224

gw 10.112.252.30

泾溪

杜荀鹤

泾溪石险人惊惧，
终岁不闻倾履人。
却是平流无石处，
时时闻说有沉沦。