* Question regarding i5/i7 CPUs (1156) - Speed Bins
@ 2009-10-13 23:55 Justin Piszcz
2009-10-14 13:41 ` Justin Piszcz
2009-10-14 15:16 ` Matthew Garrett
0 siblings, 2 replies; 3+ messages in thread
From: Justin Piszcz @ 2009-10-13 23:55 UTC (permalink / raw)
To: linux-kernel
Hello,
In order to gain the acceleration e.g. 2.93GHz -> 3.6GHz for a single
thread, does one need to use a cpu daemon?
e.g.,
powernowd - control cpu speed and voltage using 2.6 kernel interface
Or so?
Or does this happen at the BIOS level without the OS' intervention?
Justin.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question regarding i5/i7 CPUs (1156) - Speed Bins
2009-10-13 23:55 Question regarding i5/i7 CPUs (1156) - Speed Bins Justin Piszcz
@ 2009-10-14 13:41 ` Justin Piszcz
2009-10-14 15:16 ` Matthew Garrett
1 sibling, 0 replies; 3+ messages in thread
From: Justin Piszcz @ 2009-10-14 13:41 UTC (permalink / raw)
To: linux-kernel
On Tue, 13 Oct 2009, Justin Piszcz wrote:
> Hello,
>
> In order to gain the acceleration e.g. 2.93GHz -> 3.6GHz for a single thread,
> does one need to use a cpu daemon?
>
> e.g.,
> powernowd - control cpu speed and voltage using 2.6 kernel interface
>
> Or so?
>
> Or does this happen at the BIOS level without the OS' intervention?
>
> Justin.
>
One follow-up question, is there anyway to verify that it is working?
Justin.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question regarding i5/i7 CPUs (1156) - Speed Bins
2009-10-13 23:55 Question regarding i5/i7 CPUs (1156) - Speed Bins Justin Piszcz
2009-10-14 13:41 ` Justin Piszcz
@ 2009-10-14 15:16 ` Matthew Garrett
1 sibling, 0 replies; 3+ messages in thread
From: Matthew Garrett @ 2009-10-14 15:16 UTC (permalink / raw)
To: Justin Piszcz; +Cc: linux-kernel
On Tue, Oct 13, 2009 at 07:55:33PM -0400, Justin Piszcz wrote:
> Hello,
>
> In order to gain the acceleration e.g. 2.93GHz -> 3.6GHz for a single
> thread, does one need to use a cpu daemon?
No. If you're in P0, the package will run cores at the highest speed it
can given the current constraints.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 3+ messages in thread
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2009-10-13 23:55 Question regarding i5/i7 CPUs (1156) - Speed Bins Justin Piszcz
2009-10-14 13:41 ` Justin Piszcz
2009-10-14 15:16 ` Matthew Garrett
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