Re: [Xen-users] Low CPU performance on Xen PV VM

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Jan 08, 2016 at 11:40:53PM +0100, Jeroen van Kessel wrote:
[...]
> 
> Is there any options to give the paravirtualized guest the host-cpu
> topology? In other words, how do I get Xen to use more vCPU cores?
> 

I guess LINPACK relies heavily on using topology to make decisions on
how it should run?

Give guest host-cpu toplogy -- no, it's not possible to do this at the
moment. That's a feature under development.

However, Xen should utilise as many physical cpus as possible. As you
see in "xl vcpu-list", vcpus of your guest are able to run on 4 pcpus.


Wei.

> Thanks!
> 
> 
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