Messages in this thread |  | | | Date | Tue, 13 Nov 2001 10:47:20 +0100 | | From | Sebastian Heidl <> | | Subject | Re: doing a callback from the kernel to userspace |
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On Mon, Nov 12, 2001 at 07:27:14PM +0100, Manfred Spraul wrote: > The latency you talk about is the time required to schedule - there is nothing > you driver can do to reduce that - syscall, signal or your own code must wait > until schedule() decides to run your process. > > I'd try to > a) switch your process to realtime priority, mlockall your app. > b) use the low-latency patches. They were regularly discussed on > linux-kernel, search through the archives. i'll definitely hav a look at these patches, thanks
> > Are you sure you need 10 to 20 usec? Then a hard realtime with everything > in kernel is your only option, i.e. rtlinux. Yes I'm sure and no, I don't think rtlinux is necessary, see my post answering Richard.
thanks again, maybe the ll-patches and some priority shifting is all I need _sh_
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