Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0

[Florian Schmidt]

On Wed, 27 Oct 2004 12:33:29 +0200
Florian Schmidt <mista.tapas@xxxxxxx> wrote:

> V0.3.2 builds and boots fine here. It seems to run ok, too. Uptime 25
> minutes and no BUG's [yay! 25 minutes already! ;)]. Well anyways,
> preempt_max_thresh is at 38us after running several concurrent find's plus
> jackd.
> 
> There's a problem though with jackd performance. Read on below if it is of
> any interest at this point. 
[snip]

anyways, i still see the mysterious pauses which do not show up in the
preempt_max_thresh.

ah, and btw: what does the /proc/sys/kernel/kernel_preemption tunable do
with PREEMPT_REALTIME enabled?

mango:~# cat /proc/sys/kernel/kernel_preemption 
1

[all the other VP tunables are not available anymore]

mango:~# cat /proc/sys/kernel/voluntary_preemption
cat: /proc/sys/kernel/voluntary_preemption: No such file or directory
mango:~# cat /proc/sys/kernel/hardirq_preemption
cat: /proc/sys/kernel/hardirq_preemption: No such file or directory
mango:~# cat /proc/sys/kernel/softirq_preemption
cat: /proc/sys/kernel/softirq_preemption: No such file or directory

flo
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