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Thread: Poor network performance with iperf

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hi, running ubuntu 10.04 on asus at3iont-i deluxe (atom 330) motherboard in home network. created windows 7 share movies in order stream ubuntu machine (running mythtv).

when streaming isos or other high bitrate files notice buffering. network 100baset. router shows 100mbps full duplex both machines (windows 7 server , ubuntu client).

iperf ubuntu shows following:

code:
------------------------------------------------------------  client connecting 192.168.1.3, tcp port 5001  tcp window size: 16.0 kbyte (default)  ------------------------------------------------------------  [  3] local 192.168.1.14 port 44326 connected 192.168.1.3 port 5001  [ id] interval       transfer     bandwidth  [  3]  0.0-10.0 sec  5.02 mbytes  4.21 mbits/sec  [  3] 10.0-20.0 sec  6.24 mbytes  5.24 mbits/sec  [  3] 20.0-30.0 sec  6.92 mbytes  5.81 mbits/sec  [  3] 30.0-40.0 sec  12.7 mbytes  10.7 mbits/sec  [  3] 40.0-50.0 sec  10.3 mbytes  8.66 mbits/sec
these figures lower expect , show more variation (highest figure more twice lowest figure).

thought cifs issue (lots of threads on that), iperf not doing either can see.

suggestions? upgrade gigabit router, both machines gigabit capable, shouldn't need , worried won't make difference if atom machine i/o or cpu bound somehow or it's ubuntu config/tuning issue.

appreciated!

alfie.

are streaming video? if so, better performance faster cpu , nvidia video card vdpau installed. oh, motherboard has nvidia graphics; did install vdpau? (also mplayer2 , smplayer. in smplayer, go options> preferences> video> output driver, select vdpau.)

try lightweight version of ubuntu such lubuntu or xubuntu.

see also: http://www.mythtv.org/wiki/optimizing_performance


Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [ubuntu] Poor network performance with iperf


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