correct CONFIG_HZ option

[naveen yadav]

Hi,

AFAIK.

If you enable CONFIG_NO_HZ, then there is no meaning of HZ.
If CPU is heavy loaded it run with 10ms, and it idle then timer tick is off.

2. drawback of dynamic CONFIG_NO_HZ tick
a) slow response (less interactive system)



On Fri, Jun 29, 2012 at 9:36 AM, Mulyadi Santosa
<mulyadi.santosa at gmail.com> wrote:
> Hi...
>
> On Thu, Jun 28, 2012 at 6:21 PM, solmac john <johnsolmac at gmail.com> wrote:
>> Thanks for reply
>>
>> what is CONFIG_NO_HZ
>
> it enables so called dynamic tick....
>
>> can we enable CONFIG_NO_HZ and CONFIG_HZ both in our config
>
> yup...that's fine...even better, it's recommended nowadays to reduce
> power consumption at certain degree.
>
>> and what the drawback of dynamic CONFIG_NO_HZ tick.
>
> uhm, some people said to me that in certain combination, config_no_hz
> will introduce higher latency. This is due to the cost of occasional
> timer rearming, instead of classic approach where timer is programmed
> to shot regularly. But, if your setup is not very latency sensitive,
> the overhead is most likely negligible.
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>
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