Re: [Ltib] Setting HZ

[Vadim Lebedev]

Hi Fabio,

I was building zaptel/ztdummy driver used by asterisk to do conf calls.
This driver needs 1ms  clock to operate correctly.
It can use  linux high resolution timers, or rtc, or system tick as  
clock source.
When using system tick it needs the HZ to be at least 1000 to operate  
correctly.

Finally i've opted for HRTs but i didn't test this yet, so maybe i'm  
going to fallback to set the HZ=1000.

Couple of years ago i've worked with linux on Atmel's AT91RM200  and  
i've been setting HZ=1000 - it worked flawlessly



Thanks
Vadim


Le 24 oct. 08 à 13:44, Estevam Fabio a écrit :

> Hi Vadim,
>
> I saw in the ARM kernel mailing list that someone suggested a way to
> seeting HZ in the kernel menunconfig. Hopefully it worked for you.
>
> Just curious: do you have better performance when setting HZ=1000?  
> What
> was your main motivation by changing it to 1000?
>
> Thanks,
>
> Fabio Estevam
>
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On Behalf
> Of Vadim Lebedev
> Sent: Wednesday, October 22, 2008 12:29 PM
> To: ltibext
> Subject: [Ltib] Setting HZ
>
>
> I'm want to change HZ value to 1000  on my mx27 based sysem,
>
> but mysteriously the Kernel Features kconfig menu does not present  
> this
> option.
>
> I'm completely baffled the arch/arm/Kconfig contains entry for HZ  
> but it
> is no presneted in the menu....
>
>
> Any ideas?
>
>
> Thanks
> Vadim
>
>
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