Xen handles the AMD HE CPUs just fine here. What sort of breakage are you experiencing?
William
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.
From: William Pitcock [mailto:nenolod@systeminplace.net]
Sent: Wednesday, May 13, 2009 3:20 PM
To: Tomas L. Byrnes; Kai Chen; nanog@merit.edu
Subject: Re: questions about DVFS in saving energyXen handles the AMD HE CPUs just fine here. What sort of breakage are
you experiencing?William
From: Tomas L. Byrnes
To: Kai Chen
To: nanog@merit.edu
Subject: RE: questions about DVFS in saving energy
Sent: May 13, 2009 2:31 PMFrom: Kai Chen [mailto:kch670@eecs.northwestern.edu]
Sent: Wednesday, May 13, 2009 12:25 PM
To: nanog@merit.edu
Subject: questions about DVFS in saving energyHi, could anyone here have some idea of the following questions about
Dynamic Voltage/Frequency Scaling techniques used for energy
efficiency,
Tomas L. Byrnes wrote:
Basically the CPU scaling on the host makes the guest OS fall apart.
Apologies for the general noise (and even more apologies for stepping outside of the nanog scope), but if it's timing related issues does /usepmtimer not resolve this issue for the VMs? It certainly does on other virtualisation solutions.
Apologies for skirting close, but I think power consumption and heat
dissipation are pretty big operator costs, and anything we can do to
reduce those are beneficial to the bottom line; never mind the
environment. More below:
From: Karl Southern [mailto:karl@theangryangel.co.uk]
Sent: Thursday, May 14, 2009 1:10 AM
To: Tomas L. Byrnes
Cc: nanog@merit.edu
Subject: Re: questions about DVFS in saving energyTomas L. Byrnes wrote:
Basically the CPU scaling on the host makes the guest OS fall apart.
Apologies for the general noise (and even more apologies for stepping
outside of the nanog scope), but if it's timing related issues does
/usepmtimer not resolve this issue for the VMs? It certainly does on
other virtualisation solutions.
[TLB:] We tried all the solutions we could Google, including
/usepmtimer. A potential 50% reduction in power per system (which is
what we were measuring in the tests) would be significant.
Unfortunately, it was not stable. It appears to be a Win2K3 issue,
although Red Hat Enterprise ran at the declock speed all the time, even
under heavy loads (it didn't crash and corrupt volumes like Win2K3,
however).