Re: [Xen-devel] Xen optimization

[Julien Grall <julien.grall@xxxxxxx>]

Hi Stefano,

On 10/24/18 1:24 AM, Stefano Stabellini wrote:
> On Tue, 23 Oct 2018, Milan Boberic wrote:
> I don't have any other things to suggest right now. You should be able
> to measure an overall 2.5us IRQ latency (if the interrupt rate is not
> too high).
Is it number you measured on Xen 4.11 flavored Xilinx? Or are they 
coming from the blog post [1] which is based on Xen 4.9?
If the latter, then I can't rule out we may have introduce a slowdown 
for good or bad reason...
To rule out this possibility, I would recommend to try and reproduce the 
same number on Xen 4.9 and then try with Xen 4.11.
Cheers,

[1] https://blog.xenproject.org/2017/03/20/xen-on-arm-interrupt-latency/

--
Julien Grall

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