Hi Roger! On Sun, 10 Dec 2006, Roger Heflin wrote: > Helmut 'Kolbi' Kolb wrote: > > I have detected massive network problems with this constellation. > > Whenever the MPEG Stream has above 5-6 mbps (as shown on the OSD) the > > playback is jerking and it looks like the MVP doesnt get the data fast > > enough. > > I found some information on the Internet, that the Network chip on the > > MVP has some problems with its FIFOs - and it really shows a fast > > increasing amount of RX overrun errors on eth0.
> If you are getting overruns, try cutting the NFS blocksize in half. Yes, thats the solution. Doing this reduces the number of RX overruns to "0" (zero!) - great thing! > The overruns are from the main machine sending out the 4k packets > as 3 - 1500 byte packets very quickly, and if the MVP chip cannot > clear the packets fast enough, then you get an overrun, on mine this > only seems to start being an issue when the myth machine is loaded > in certain ways. Mine got alot better when it was set down to 2048 > rather than 4096. ...and thank you too for this good explanation, seems like the right time to look a bit into NFS. > On mine I tried to optimize it and change to 8k and things got > much worse (on high end machines it is typical to set the nfs > block size to 32k to increase speed-but the have enet chips that > I believe cost about what the entire MVP costs). Or even more... Helmut ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Mvpmc-users mailing list Mvpmc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
