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Re: [Xen-users] Xen 3.2 on CentOS calculates AMD cpu frequency incorrect
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| Subject: | Re: [Xen-users] Xen 3.2 on CentOS calculates AMD cpu frequency incorrect |
| From: | Kai Schaetzl <maillists@xxxxxxxxxxxxx> |
| Date: | Sun, 03 Aug 2008 20:06:09 +0200 |
| Delivery-date: | Sun, 03 Aug 2008 11:07:40 -0700 |
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Kai Schaetzl wrote on Sun, 03 Aug 2008 16:33:22 +0200: > Is there kernel parameter or something I could use to correct this > behavior? After some more research I have found the correct incantation for this. The CentOS/RH kernels seem to have this enabled by default, the kernels from xen.org have to be "enabled" with a command-line option to the hypervisor-kernel (not the CentOS kernel). kernel /xen.gz-3.2 cpufreq=dom0-kernel I'm getting now correct readings of the frequencies. And scaling up on demand works. At least in dom0. I'm not so sure if it works for domUs as well. A quick test showed no ondemand scaling in dom0 when running a cpu- intensive task in a domU. Anyone has more experience with this? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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