Re: [announce] [patch] Voluntary Kernel Preemption Patch

Nick Piggin
2004-07-10T14:45:13Z

Ingo Molnar wrote:
> * ismail dönmez <ismail.donmez@gmail.com> wrote:
>
>
>>>what filesystem are you using?
>>>
>>
>>XFS
>
>
> i've fixed latencies in ext3, i'm not sure how bad XFS is. But 2-3
> seconds delay is almost impossible to be a true scheduling latency -
> it's probably IO latency impacting your audio application. (it could
> also be normal preemption latency, if those tasks are not running as
> SCHED_FIFO - but 2-3 seconds preemption latency should not be caused by
> a simple cp -a. This leaves IO latency.).
>

But it only skips when using aRts, which points the other way ;)

If all tasks are using realtime scheduling, then this discounts
the scheduler from the equation, however I'm not sure if this is
the case?