Re: [Xen-devel] Xen Performance Results

[George Dunlap <dunlapg@xxxxxxxxx>]

On Thu, Dec 21, 2017 at 2:42 PM, Sergej Proskurin
<proskurin@xxxxxxxxxxxxx> wrote:
> Hi all,
>
> For the sake of completeness: the solution to the issue stated in my
> last email was deactivating Intel's Turbo Boost technology directly in
> UEFI (deactivating Turbo Boost through xenpm was not enough). Apparently
> Turbo Boost affects Linux and KVM differently than Xen, which led to the
> phonomenon, in which the benchmark execution on Xen appeared faster than
> on bare metal.

*Appeared* faster than on bare metal, or *was* faster than on bare metal?

If the source of the change was the Turbo Boost, it's entirely
possible that the difference is due to the placement of workers on
cpus -- i.e., that Linux's bare metal scheduler makes a worse choice
for this particular workload than Xen's scheduler does.

 -George

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel