[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] memory performance 20% degradation in DomU -- Sisu
On Tue, 2014-03-11 at 10:46 -0500, Sisu Xi wrote: > Can you be more specific about the highest performance modes of the > CPU? For all the experiments, I disabled hyperthreading and frequency > scaling, so CPU should work at a constant speed. > It was about TurboBoost (or whatever it's called) mode: http://en.wikipedia.org/wiki/Intel_Turbo_Boost Some more info on this old blog post: http://blog.xen.org/index.php/2011/11/29/baremetal-vs-xen-vs-kvm-redux/ If you're completely disabling cpufreq via BIOS, I'd say this is ruled out, but I can't be 100% sure. Also, that should be fixed in recent enough Xen and Dom0 kernel. Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) Attachment:
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