[Debian-eeepc-devel] linux kernel, CONFIG_HZ_ and netbook

[Ben Armstrong]

On 25/02/10 06:29 AM, Ben Armstrong wrote:
> On 25/02/10 06:22 AM, giggzounet wrote:
>> Hi,
>>
>> I'm compiling the last kernel. And I have a doubt on the choice of 
>> CONFIG_HZ : 250, 300 or 1000Hz ? On desktop computers I always set 
>> 1000Hz, but for my netbook I don't know : does the computer consume 
>> more energy with 1000hz ? Do you have Papers on this topic ?
>
> I don't know.  Outside of the scope of our project.
>
> I assume Debian has chosen reasonable defaults:
>
> CONFIG_NO_HZ=y
> CONFIG_HZ_250=y
> CONFIG_HZ=250
>
> The first one makes the stock Debian kernel 'tickless' which results 
> in considerable power savings:
>
> http://www.phoronix.com/scan.php?page=article&item=651&num=1

Huh.  That will teach me not to just skim articles before posting.  I 
looked at the difference in the bar charts without reading and 
misinterpreted it. :)  They said there was hardly any savings.  Better 
just google "tickless kernel" to find out more.

Ben