[ltp] Re: Is 21W good or too much for a dual core duo thinkpad?

[Aidan Marks]

a few times i've tried disabling the 2nd core.  power consumption went
up immediately, even when my t60 was fairly idle.

as a result, i leave both cpus enabled for my aeroplane runlevel.

Henrique de Moraes Holschuh wrote:
> On Wed, 17 Oct 2007, Daniel Pittman wrote:
>> The one question I have, since I don't yet have a dual-core machine, is
>> what difference it makes to disable one of the two CPU cores when you
>> are not needing the CPU power?
>>
>> Rumor, in the form of comments from kernel developers in CPU hotplug
>> threads, has it that this can deliver a notable power saving.  
> 
> Test it first.  It can actually draw a lot more power, depending on whether
> the kernel manages to get the second core down to C4 or not, and whether
> turning that core off makes the remaining core stay more time out of C3 or
> not.
>