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Re: [Xen-devel] Xen optimization

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.


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

Julien Grall

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