Re: [PATCH v6 0/9] xen: drop hypercall function tables

[Juergen Gross <jgross@xxxxxxxx>]

On 24.03.22 15:01, Juergen Gross wrote:
> In order to avoid indirect function calls on the hypercall path as
> much as possible this series is removing the hypercall function tables
> and is replacing the hypercall handler calls via the function array
> by automatically generated call macros.
>
> Another by-product of generating the call macros is the automatic
> generating of the hypercall handler prototypes from the same data base
> which is used to generate the macros.
>
> This has the additional advantage of using type safe calls of the
> handlers and to ensure related handler (e.g. PV and HVM ones) share
> the same prototypes.
>
> A very brief performance test (parallel build of the Xen hypervisor
> in a 6 vcpu guest) showed a very slim improvement (less than 1%) of
> the performance with the patches applied. The test was performed using
> a PV and a PVH guest.
A gentle ping regarding this series.

I think patch 1 still lacks an Ack from x86 side. Other than that
patches 1, 2 and 4 should be fine to go in, as they are cleanups which
are fine on their own IMHO.

Andrew, you wanted to get some performance numbers of the series using
the Citrix test environment. Any news on the progress here?


Juergen

Attachment: OpenPGP_0xB0DE9DD628BF132F.asc
Description: OpenPGP public key

Attachment: OpenPGP_signature
Description: OpenPGP digital signature