correct CONFIG_HZ option

[solmac john]

Thanks for reply

what is CONFIG_NO_HZ

can we enable CONFIG_NO_HZ and CONFIG_HZ both in our config

and what the drawback of dynamic CONFIG_NO_HZ tick.





On Tue, Jun 26, 2012 at 10:47 AM, Mulyadi Santosa <mulyadi.santosa at gmail.com
> wrote:

> Hi... :)
>
> On Tue, Jun 26, 2012 at 12:10 PM, solmac john <johnsolmac at gmail.com>
> wrote:
> > I am using ARM multicore board and by default
>
> okay, I am answering it from what I know about HZ impact on x86...
>
> > CONFIG_HZ=250
>
> looks good... a middle safe number, not too high not too low...
>
> > Query: - 1- How to decide HZ for particular hardware
>
> it's you who decide...do you want finer grained timer? or coarse one?
>
> the impact is usually toward latency and responsiveness....together
> with preemption model you choose actually.
>
> >               2- Which is the best open source tool to test system
> > performance from given HZ.
>
> run your application in that platform and see if it gives you impact.
> from my experience, unless you need application that is sensitive in
> timing such as MIDI sequencer, you won't notice the difference.
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>
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