linuxaudio.org

On Tue, 2012-08-21 at 20:57 +0200, Jeremy Jongepier wrote:

quoted text
> On 08/21/2012 08:36 PM, david wrote:

> >

> > Debian Sid has an RT kernel available, too.

>

> Checked the config.

>

> CONFIG_HZ_250=y

>

> Or doesn't that matter because

>

> CONFIG_NO_HZ=y

>

> ??

>

> I've never used a tickless kernel, does it perform better or is there no

> real difference?

Good question. I always set up CONFIG_HZ_1000=y, but I also use HPET.

There's a difference regarding to jitter between Hz 1000 and HPET when

using hardware MIDI. I'm unsure if there's a difference between tickless

yes and no. Some people claim that tickless = yes could cause issues.

Most of my kernels where compiled with tickless = yes and I don't think

that issues I got were related to this. I suspect that tickless did

improve MIDI jitter too, but I don't compare same kernels with tickless

yes/no. Dunno! However, IIRC tickless is only used when we use hrtimer

(HPET)???
Regards,

Ralf
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