[linux-audio-user] -rt IRQ handler priorities

Lee Revell rlrevell at joe-job.com
Tue May 9 16:07:00 EDT 2006


On Tue, 2006-05-09 at 12:56 -0700, Kjetil S. Matheussen wrote:
> 
> Then theres a latency problem in the kernel. A sleeping high priorioty
> SCHED_FIFO thread must be woken up in time even if another lower 
> priority SCHED_FIFO thread is buzy-looping. And currently, unless the 
> softirq timer has priority 99, that condition can not be fullfilled.
> 
> So, the softirq timer must run with priority 99. 

I think it's unusual to want a high priority SCHED_FIFO thread to be
awakened by a timer.  What are you trying to do?

Lee




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