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RE: [Xen-devel] Poor HVM performance with 8 vcpus

> At the very least it would be good to have a predictor which figured
out which
> of the several heuristics should actually be used for a given VM. A
> "try whichever one worked last time first" should work fine.
> Even smarter would be two just have heuristics for the two general
classes of
> mapping (1:1 and recursive), and have the code automatically figure
out the
> starting virtual address being used for a given guest.

Are there any other of these heuristics tucked away in xen? Would there
be any benefit to specifying the OS being virtualised in the config? Eg


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