Re: real-time threaded IO with low latency (audio)
yodaiken@chelm.cs.nmt.edu
Sun, 25 Jul 1999 05:27:55 -0600
On Sun, Jul 25, 1999 at 01:38:12AM +0200, David Olofson wrote:
> Well, what I'm looking for is a way to use RTLinux as a high priority RT
> scheduler that can switch to user context in order to execute code while
> still in RT context with regard to timing. In that case, Linux can even
> be completely frozen! RT tasks would still run, just as is the case with
> RTLinux, provided EVERYTHING is really in locked memory.
I've considered doing it but we need to exit the RT context on
1. system call
2. page fault - stacks can cause 'em even after mlockall
3. any other trap or error condition that puts us in K mode.
The methods I've thought of for doing this are unpleasant.
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