[MPlayer-users] Mencoder and HuffYUV

[D Richard Felker III]

On Fri, Feb 18, 2005 at 10:14:19PM +0100, Reimar Döffinger wrote:
> Hi,
> On Mon, Feb 14, 2005 at 09:04:18AM +0100, Levente Novák wrote:
> > Reimar Döffinger wrote:
> > >update is a daemon that does sync all the time - if you use that instead
> > >of letting the kernel make that decision you don't have to be surprised
> > >if you get bad performance. Simply removing that daemon should do the
> > >job even better - and there is no reason to run it unless you have
> > >critical data and/or expect your PC to crash a lot.
> > 
> > Yes and no. It is true this can cause harm, but so far it is the only 
> > way to get smooth HuffYUV captures. I did not mean it has to run all the 
> > time -- just enable it before capture and disable afterwards.
> > Without, HUffYUV capture -- on my box -- doesn't work smoothly. More 
> > exactly this is not the capture itself, but the disk transfer which hogs 
> > periodically the system.
> 
> I didn't test how my system behaves, but this very much sounds like
> stupid kernel behaviour to me - it should usually write out data to the
> disc constantly, not periodically... Maybe a different kernel
> IO-Scheduler can improve things, too?

just rtfm on /proc/sys/vm/bdflush
i use the following, ymmv...
echo "10 500 0 0 30000 90000 60 5 0" > /proc/sys/vm/bdflush

rich