Re: xen on i7-12700: works with cet-no-ibt !!

[Greg Troxel <gdt%lexort.com@localhost>]

Manuel Bouyer <bouyer%antioche.eu.org@localhost> writes:

> I did the m4 build test on a
> cpu0: "Intel(R) Xeon(R) W-2223 CPU @ 3.60GHz"                   
>
> PVH
>        47.39 real        31.13 user        13.48 sys
>        47.19 real        31.27 user        13.54 sys
>        47.26 real        31.23 user        13.65 sys
>        47.65 real        32.26 user        13.01 sys
>
> PVHVM
>        47.30 real        31.13 user        13.36 sys
>        47.07 real        31.30 user        13.39 sys
>        47.55 real        31.80 user        13.37 sys
>        47.13 real        31.89 user        12.89 sys
>
> (no bare metal test here, it's a production machine).
> I'd say the time differences are actually in the noise margin - especially
> as the host is not idle.

Those are certainly self-consistent and with each other.   I don't
really know what's going on, of course, but what seems clear is that
people should compare pvh to pvhvm to decide what to do, if they have a
choice.