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
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