questions about DVFS in saving energy

Tomas L. Byrnes tomb at byrneit.net
Wed May 13 22:22:36 CDT 2009


Top-post due to prior:

VMWare Server 1.x/ Win2K3 server, standalone and as host for above.

VMWare ESXi: Win2K3 and Win2K systems trash volumes.

Basically the CPU scaling on the host makes the guest OS fall apart.

>-----Original Message-----
>From: William Pitcock [mailto:nenolod at systeminplace.net]
>Sent: Wednesday, May 13, 2009 3:20 PM
>To: Tomas L. Byrnes; Kai Chen; nanog at merit.edu
>Subject: Re: questions about DVFS in saving energy
>
>Xen handles the AMD HE CPUs just fine here. What sort of breakage are
>you experiencing?
>
>William
>------Original Message------
>From: Tomas L. Byrnes
>To: Kai Chen
>To: nanog at merit.edu
>Subject: RE: questions about DVFS in saving energy
>Sent: May 13, 2009 2:31 PM
>
>
>-----Original Message-----
>From: Kai Chen [mailto:kch670 at eecs.northwestern.edu]
>Sent: Wednesday, May 13, 2009 12:25 PM
>To: nanog at merit.edu
>Subject: questions about DVFS in saving energy
>
>Hi, could anyone here have some idea of the following questions about
>Dynamic Voltage/Frequency Scaling techniques used for energy
efficiency,
>or please give a pointer that I can trace,
>1) how many servers in the market support this technique?
>2) how many voltages/frequencies can the servers support?
>3) What's the transition time and cost (power) between these
>voltages/frequencies?
>
>Thanks,
>-Kai
>_______________________________________________________________________
_
>____________________________________
>
>
>My experience with the AMD HE CPUs has been that the scaling breaks
>Win2K3, and any virtualized environments.
>
>
>
>--
>William Pitcock
>SystemInPlace - Simple Hosting Solutions
>1-866-519-6149




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