[LAU] unable to set scheduling priority with rt kernel

Lee Revell rlrevell at joe-job.com
Mon Oct 29 11:26:53 EDT 2007


On 10/29/07, Chuckk Hubbard <badmuthahubbard at gmail.com> wrote:
> Update: I just discovered that running jackd -R -P 70 -dalsa -P -p256 -n2
> -r44100 as ROOT doesn't even set priority 70.  jackd then runs as a root
> process with priority 20, according to both chrt and top.
> Apparently my system is not able to run anything higher than 20 priority;
> does this mean my kernel is misconfigured, or might it be something else?

jackd is a multithreaded process, you can't just look at the priority
of the main thread, you have to check all of them.  It should have
some SCHED_FIFO threads and some SCHED_NORMAL threads.

Lee



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