Messages in this thread | | | Subject | Re: [PATCH] Add p4-clockmod driver in x86-64 | From | Alan Cox <> | Date | Wed, 27 Oct 2004 22:50:38 +0100 |
| |
On Mer, 2004-10-27 at 22:38, Rutger Nijlunsing wrote: > So you've got the _disadvantages_ of a slow clock (programs run > slower), and not the _advantages_ (power consumption is same as idle > CPU and not lower, temperature is same as idle CPU and not lower). > > But why does the P4 have such a mode? It uses this mode during thermal > throttling to get to the 'idle' temperature.
It isn't obvious how you software idle a PIV - "hlt" at least does not seem to do that.
> Therefore, p4-clockmod is completely misnamed: it's _not_ a cpufreq > driver in the sense that it does not change the frequency.
It performs a similar function less efficiently. Lots of older chipsets for K6 and the like also only support this form of clock control.
Alan
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |