On 22 Jul 99, at 2:34, SteenbeckDigital wrote:
>
> Paul Schulz([EMAIL PROTECTED]) SysAdmin
> wrote
>
> Has anyone thought about how to write a RT module/driver that
> could drive a CD burner?
> I has destroyed numerous blanks because of buffer underflows
> and am thinking that this is an ideal RT linux application.
>
> #######################
>
> This looks like a SOFT realtime application to me.
> Trouble with plain linux is that the disk IO driver does
> not handle prioritys. I went thru this when I started my
> hard disc recorder.
> It is not a HARD realtime application like we talk about
> in this mailling list, you talk about chunks of milliseconds.
> The benefit of rt-linux is to handle to handle buches of
> micro seconds.
>
> Good luck
> Jens Michaelsen
You're confusing real-time with real-fast. It
doesn't matter if your deadlines are measured in
microseconds or milliseconds or even in days, if
the deadline absolutely has to be met no matter
what, as is the case for the CD burner, then it
is a hard real-time problem not a soft real-time
one.
You can play with priorities in ordinary linux
all you like but you'll never get the 100%
guarantee that the job will be done on time,
which you get from RT-Linux.
Ian Ridley
email:[EMAIL PROTECTED]
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For more information on Real-Time Linux see:
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