| Date | Wed, 20 Oct 2004 14:50:19 +0200 | From | Florian Schmidt <> | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8 |
| |
On Wed, 20 Oct 2004 11:45:08 +0200 Ingo Molnar <mingo@elte.hu> wrote:
> http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.9-rc4-mm1-U8
Hi,
i just wanted to let you know that with U8 i still experience the "pauses" i reported on U6, too. I would guess that it's some scheduler thing as jackd running SCHED_FIFO and all its clients (at least the audio threads running SCHED_FIFO) are not affected by the pauses (i don't see any xruns from jackd and audio processing happily goes along without audible dropouts).
Also it seems that /proc/sys/kernel/trace_enabled == 1 is not the only thing being able to trigger the pauses. With U6 i also experienced them with trace_enabled == 0. I have to add though that it took quite a while for them to kick in (hours) after setting trace_enabled to 0. So my conclusion is that trace_enabled == 1 just increases the probability of such pauses by several magnitudes (with 1 i get about one of these pauses per 2-10 minutes, with 0 it took several hours for the first pause to occur and then they stayed less frequent than with 1).
Ah and i forgot: dmesg -n 1 does not help..
flo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|