iperf 是一個基于C/S模型的純帶寬測試軟件,可以測試網(wǎng)卡的吞吐量。
iperf的好處是純粹發(fā)包和接收,防止硬盤拖后腿,影響測試結(jié)果。
本文以千兆網(wǎng)卡Bcom 5720 進(jìn)行測試,環(huán)境CentOS 6.4 x64
在兩臺機(jī)器上分別安裝iperf
yum install iperf --enablerepo=epel
在其中一臺以服務(wù)端方式啟動,并開放防火墻5001端口
iperf -s -i 1 -w 448k
啟動結(jié)果如下:
Server listening on TCP port 5001
TCP window size: 448 KByte
在另一臺上,以客戶端方式連接到服務(wù)端,測試10分鐘
iperf -c 10.10.10.22 -i 1 -w 448k -t 600
此時,服務(wù)端會顯示如下信息
[ 4] local 10.10.10.22 port 5001 connected with 10.10.10.11 port 56251
[ ID] Interval Transfer Bandwidth
[ 4] 0.0- 1.0 sec 112 MBytes 941 Mbits/sec
[ 4] 1.0- 2.0 sec 112 MBytes 941 Mbits/sec
[ 4] 2.0- 3.0 sec 112 MBytes 941 Mbits/sec
[ 4] 3.0- 4.0 sec 112 MBytes 941 Mbits/sec
[ 4] 4.0- 5.0 sec 112 MBytes 941 Mbits/sec
[ 4] 5.0- 6.0 sec 112 MBytes 941 Mbits/sec
[ 4] 6.0- 7.0 sec 112 MBytes 941 Mbits/sec
[ 4] 7.0- 8.0 sec 112 MBytes 941 Mbits/sec
客戶端信息則是
3] 46.0-47.0 sec 112 MBytes 942 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 47.0-48.0 sec 112 MBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 48.0-49.0 sec 112 MBytes 942 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 49.0-50.0 sec 112 MBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 50.0-51.0 sec 112 MBytes 942 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 51.0-52.0 sec 112 MBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 52.0-53.0 sec 112 MBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 53.0-54.0 sec 112 MBytes 942 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 54.0-55.0 sec 112 MBytes 941 Mbits/sec
以上信息顯示,當(dāng)前網(wǎng)卡傳輸速度約為940Mbit/s,接近理論速度1G/s,下載速度112M/s,也接近理論速度125M/s,通過cacti 帶寬監(jiān)控,也顯示上述統(tǒng)計結(jié)果。
至此,千兆網(wǎng)卡驗明正身。
補充說明,影響帶寬的可能原因有很多:
1、交換機(jī)是百兆的,通信樞紐
2、千兆網(wǎng)卡工作在百兆模式,參與測試的機(jī)器任意一臺工作在百兆都不行
3、用真實的硬盤文件進(jìn)行測試,硬盤速度拖后腿