Re: [Xen-devel] PV drivers and zero copying

[Julien Grall <julien.grall@xxxxxxx>]

On 31/07/17 10:52, Oleksandr Andrushchenko wrote:
> On 07/31/2017 12:47 PM, Julien Grall wrote:
> > On 31/07/17 10:46, Oleksandr Andrushchenko wrote:
> > Do you have any example of hardware? What are the performance you
> > require with them?
> Currently our target is Renesas R-Car Gen3
> At the moment I don't have clean requirements, but
> ideally, PV driver introduces 0% performance drop
> Some time soon I will have numbers on running display/GPU
> with and without zero-copy - will keep updated
PV driver with 0% performance drop sounds a stretch target. But this is 
does not answer to my question. Do you have any hardware that does not 
support scatter/gather or not protected by an IOMMU that will be 
interfaced with PV drivers?
Cheers,

--
Julien Grall

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