I was wondering if you could apply DVFS on a VM level or if you always tune the operating frequency and voltage for the whole server.
I was also wondering if there are any good models that determine the performance degradation and the energy savings as a function of the selected operating frequency/voltage.
Mohammad Shojafar
As I know, in the real system, DVFS is CPU-based technology and is correlated to the server specification. But, I have seen some research works that use it as VM level which run each VM on each server.
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Fábio Diniz Rossi
Hi Mehiar,
- No. You cannot use Dvfs in different frequencies on different VMs. Dvfs changes the frequency of the entire processor, and not per core.
- Yes, there are models for tradeoff between power savings and performance. You can see 10.1016/j.jpdc.2012.01.006
- I have paper in this way in my researchgate page too.
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Mehiar Dabbagh
Thank you Mohammad and Fabio.
Fabio: could you please mention the name of the paper you are talking about as I found many papers on you research page that talk about DVFS.
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