Re: [Discuss-gnuradio] End-to-end delay question

[Michael Dickens]

On May 21, 2007, at 3:04 PM, Eric Blossom wrote:
> We have the capability to request real time scheduling (currently only
> on systems that implment POSIX sched_setscheduler), but generally
> avoid it by default, since folks have been known to frequently blow
> their own feet off.

Looking at gnuradio-core/lib/src/runtime/gr_realtime.cc, it seems  
that the running thread's scheduling is set to FIFO and the priority  
is maximized.  If this is "all" that's being done, then this can be  
ports to pthread's (also supposedly POSIX), as on some BSD (and thus  
OSX) systems.  Instead of "sched_setscheduler" (which sets both the  
scheduling policy and priority), use "pthread_attr_setschedparam" and  
"pthread_attr_setschedpolicy".  I will look into it. - MLD