[Xen-API] Changing (soft) VCPU affinity while VM is running

[Dimosthenis Pediaditakis <dimosthenes@xxxxxxxxx>]

Hi all,

I've seen that "VCPUs-params:mask=......" Â does notÂ

force a running VM's ÂVCPU to relocate on another PCPU.

It is rather required to power-cycle the VM in order the above setting to take effect.

My questions are:

Âa) Does Xen-Api expose a configuration setting for setting "soft-affinity" Â(Xen v4.5)? Does it have an effect is VM is already running? Keep in mind that I use xenserver/buildroot.Â

Âb) Is there any way (via Xen-Api) that I could force the VCPU of a running VM to be pinned on a different PCPU ?

Regarding a), it seems that this is already possible via 'xl':

http://wiki.xen.org/wiki/Tuning_Xen_for_Performance#vCPU_Soft_Affinity_for_guests

Thank you

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