[vdr] Re: Recordings menu sluggish - *the* solution.

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

"Dr. Werner Fink" wrote:
> 
> On Sat, Oct 04, 2003 at 05:09:19PM +0200, Klaus Schmidinger wrote:
> > "Dr. Werner Fink" wrote:
> > >
> > > On Fri, Oct 03, 2003 at 07:59:55PM +0200, Carsten Koch wrote:
> > > > Dr. Werner Fink wrote:
> > > > >>
> > > > >>I guess a patch that uses this should be trivial.
> > > > >
> > > > >
> > > > >If you're using O_DIRECT you've to provide the thread which writes
> > > > >out the stuff in background.  In other words: you need a ringbuffer
> > > > >an own thread and the interface for your application.
> > > > >
> > > > >If you not do this the application has to wait (e.g. a big DB using
> > > > >O_DIRECT for secure data transfer) upto the point where teh data has
> > > > >be put onto the physical sector of your disk ;)
> > > >
> > > > Isnt there code in vdr already that does this?
> > >
> > > Reading for playback yes.  Recording and cuting no.
> >
> > cRecorder does use a ring buffer.

Actually this should have been "thread", not "ring buffer", sorry.

> Try out O_DIRECT for writing out the data and see what happen ;^)

May I assume that you already know what's going to happen?

Besides, I don't favor the O_DIRECT method because it would
require too many changes and compromizes in VDR. If at all
I'd favor the O_STREAMING method.

Klaus


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