Pinning CPUs to dom0 - Does it really make a difference?
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Hello XCP Community,
I guess thats the question. Does pinning CPUs in dom0, effectively taking them away from guests, provide enough benefit to be worth it? Now I know this is a very large question with a metric s#&t ton of variables, I am just asking in general. Is there a threshold that you have seen this provide benefit?
I look forward to your thoughts.
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@hitechhillbilly no it doesn't, it just ensures the N-th vCPU of Dom0 only runs on N-th pCPU of the machine.
Not sure about the practical impact of it, in the past it has been used for getting meaningful CPU temperatures from coretemp (with physical core matching virtual one), but that doesn't work anymore since Xen filters MSR accesses (including Dom0).
