Messages in this thread | | | Date | Wed, 28 Sep 2005 10:58:32 +0100 | From | Daniel J Blueman <> | Subject | Re: TCP=828mbps, UDP=1mbps? (both running 2.6.13.2) |
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Justin,
When running iperf in UDP mode (-u), you must specify a bandwidth, ie:
server$ iperf -s -u client$ iperf -c server -u -b 1000M
Justin Piszcz wrote: > Any idea why with TCP I get 828 megabits on my gigabit connection but only > 1.05 megabits with UDP? > > Using iperf to benchmark. > > TCP > ------------------------------------------------------------ > Server listening on TCP port 5001 > TCP window size: 85.3 KByte (default) > ------------------------------------------------------------ > [ 4] local 192.168.1.12 port 5001 connected with 192.168.1.253 port > 48853 > [ 4] 0.0-35.1 sec 3.38 GBytes 828 Mbits/sec > > > UDP > ------------------------------------------------------------ > Server listening on UDP port 5001 > Receiving 1470 byte datagrams > UDP buffer size: 101 KByte (default) > ------------------------------------------------------------ > [ 3] local 192.168.1.12 port 5001 connected with 192.168.1.253 port > 32773 > [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.043 ms 0/ 893 (0%) > > > p34:~$ netstat -i > Kernel Interface table > Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR > Flg > eth0 1500 0 1266337 0 0 0 2588651 0 0 0 > BMRU > eth1 1500 0 2358 0 0 0 2229 0 0 0 > BMRU > eth2 1500 0 39706 0 0 0 5747 0 0 0 > BMNRU > lo 16436 0 184 0 0 0 184 0 0 0 > LRU > > box2:~$ netstat -i > Kernel Interface table > Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR > Flg > eth0 1500 0 2955176 0 0 0 3696501 0 0 0 > BMRU > lo 16436 0 612 0 0 0 612 0 0 0 > LRU ___ Daniel J Blueman - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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