Hi! What is the current status of support for PowerNow! and Speedstep? As I remember there were rumors, that those techniques were just supported for dom0, meaning that all the guests would run slow if dom0 idles. Is there already a solution for this implemented (in the unstable-tree), so that guests do also influence power-state? If so, does it also work with dualcore-cpus or is it better to stick with singl-core for now, if one wants to keep Powermanagement-capable? Thanks! Hannes _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi! What is the current status of support for PowerNow! and Speedstep? As I remember there were rumors, that those techniques were just supported for dom0, meaning that all the guests would run slow if dom0 idles. Is there already a solution for this implemented (in the unstable-tree), so that guests do also influence power-state? If so, does it also work with dualcore-cpus or is it better to stick with singl-core for now, if one wants to keep Powermanagement-capable? Thanks! Hannes _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Petersson, Mats
2006-Sep-15 12:06 UTC
RE: [Xen-users] Status of Xen-Powermanagement-Support
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > Hannes Petschauer > Sent: 15 September 2006 13:02 > To: xen-users@lists.xensource.com > Subject: [Xen-users] Status of Xen-Powermanagement-Support > > Hi! > > What is the current status of support for PowerNow! and Speedstep? > > As I remember there were rumors, that those techniques were just > supported for dom0, meaning that all the guests would run > slow if dom0 > idles. > > Is there already a solution for this implemented (in the > unstable-tree), > so that guests do also influence power-state? > If so, does it also work with dualcore-cpus or is it better to stick > with singl-core for now, if one wants to keep Powermanagement-capable?I was talking to Keir about this at the Xen Summit last week, and the conclusion was that it''s still not done - the code is in Xen to support writing the MSR''s, but the code to understand the overall CPU-load has to be written. Looking at Xentop and it''s interfaces and combining that with some existing code for deciding CPU speed should be a workable solution. -- Mats> > Thanks! > Hannes > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users