Re: QEMU cpu socket allocation

[Peter Zay <peterzay1@gmail.com>]

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Hi Rajesh,

Would the more intuitive CPU setting of (Sockets,Cores,Threads) = (1,16,1)
be ok?

Thanks.


On Tue, May 17, 2022 at 10:03 AM Rajesh A <rajesh.a@tatacommunications.com>
wrote:

> Hi QEMU dev
>
>
>
> Virt Manager is able to configure a QEMU VM with more CPU sockets than the
> physical host has.
>
> For example, in the below VM, when I request 16 vCPU cores,  by default it
> takes as 16 Sockets with 1 core each. The host itself has only 2 Sockets.
>
>    1. How does QEMU allow this and how the VM works?
>    2. What is the recommended configuration of Sockets/Cores/Threads for
>    best VM performance of a 16 core VM running on a 2 sockets host ?
>
>
>
>
>
> regards,
>
>
>
> *Rajesh A*
> Engineering Media Movement
> Media Services
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> rajesh.a@tatacommunications.com
>
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-- 
Peter

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