Re: [PATCH v2 00/15] xen: drop hypercall function tables

[Juergen Gross <jgross@xxxxxxxx>]

On 03.11.21 12:35, Michal Orzel wrote:
> Hi Juergen,
>
> On 01.11.2021 16:20, 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.
> >
> > Changes in V2:
> > - new patches 6, 14, 15
> > - patch 7: support hypercall priorities for faster code
> > - comments addressed
> For the ARM part:
> Apart from the issue I found and reported in patch 7/15, the build was 
> successful.
> I tested the following basics also successfully:
> -booting a dom0
> -booting domUs
> -networking between guest and dom0 using NAT
> -stressing hypercall xen_version
>
> so,
>
> Tested-by: Michal Orzel <michal.orzel@xxxxxxx>
Thanks, much appreciated!


Juergen

Attachment: OpenPGP_0xB0DE9DD628BF132F.asc
Description: OpenPGP public key

Attachment: OpenPGP_signature
Description: OpenPGP digital signature