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

[Lee Revell]

On Wed, 2006-05-10 at 12:56 +0200, Thomas Gleixner wrote:
> On Wed, 2006-05-10 at 06:49 -0400, Lee Revell wrote:
> > > 
> > > This is only true, when high resolution timers are enabled. 
> > 
> > Is there any solution for the !CONFIG_HIGH_RES_TIMERS case?  I for one
> > can't use it because my hardware doesn't support it (no local APIC).
> 
> What hardware platform ?
> 

Via C3 mini ITX board.

> HRT works with PIT only too.

I was not aware of that.

>  Otherwise you really need to chrt the
> hrtimers softirq prio statically.
> 

The problem was that setting the thread's priority to 99 caused long
latencies every 10 minutes when rt_secret_rebuild() ran, as if the timer
callbacks that do real work and the ones that just deliver a signal are
all running from the softirq timer thread.

Lee

> 	tglx
> 
> 
>