I'm having NFS problems with 0.3.2 which seem similar to below.
This is on old MVP and used to work ok with the old kernel.
I can't get a good config for the new kernel.
An NFS rsize of 2048 almost works (better than 1024 or 4096) but
still has stuttering at about 4.5Mbps.
Using the myth protocol seems to work ok, but it crashes my backend when
I stop a program so that's unusable for me.
I'm back on a daily build from 29th Nov for the time being.
Anyone know what I can try now?
Thanks
Joe
On 11/12/06, Helmut 'Kolbi' Kolb <[EMAIL PROTECTED]> wrote:
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
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