Re: Xen optimization

[Milan Boberic <milanboberic94@gmail.com>]

I misunderstood the passthrough concept, it only allows guest domain
to use certain interrupts and memory. Is there are way to somehow
route interrupt from domU (bare-metal app) to hw?
On Thu, Oct 11, 2018 at 9:36 AM Milan Boberic <milanboberic94@gmail.com> wrote:
>
> On Wed, Oct 10, 2018 at 6:41 PM Meng Xu <xumengpanda@gmail.com> wrote:
> >
> > The jitter may come from Xen or the OS in dom0.
> > It will be useful to know what is the jitter if you run the test on PetaLinux.
> > (It's understandable the jitter is gone without OS. It is also common
> > that OS introduces various interferences.)
>
> Hi Meng,
> well... I'm using bare-metal application and I need it exclusively to
> be ran on one CPU as domU (guest) without OS (and I'm not sure how
> would I make the same app to be ran on PetaLinux dom0 :D haha).
> Is there a chance that PetaLinux as dom0 is creating this jitter and
> how? Is there a way of decreasing it?
>
> Yes, there are no prints.
>
> I'm not sure about this timer interrupt passthrough because I didn't
> find any example of it, in attachment I included xen-overlay.dtsi file
> which I edited to add passthrough, in earlier replies there are
> bare-metal configuration file. It would be helpful to know if those
> setting are correct. If they are not correct it would explain the
> jitter.
>
> Thanks in advance, Milan Boberic!

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