[114497] in North American Network Operators' Group
RE: questions about DVFS in saving energy
daemon@ATHENA.MIT.EDU (Tomas L. Byrnes)
Wed May 13 15:31:31 2009
Date: Wed, 13 May 2009 12:31:24 -0700
In-Reply-To: <e81393830905131225p2918fb94k7e9747171a67df1d@mail.gmail.com>
From: "Tomas L. Byrnes" <tomb@byrneit.net>
To: "Kai Chen" <kch670@eecs.northwestern.edu>,
<nanog@merit.edu>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
-----Original Message-----
From: Kai Chen [mailto:kch670@eecs.northwestern.edu]=20
Sent: Wednesday, May 13, 2009 12:25 PM
To: nanog@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
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My experience with the AMD HE CPUs has been that the scaling breaks
Win2K3, and any virtualized environments.
