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Re: [Xen-devel] Xen optimization

Hi Dario,

On 10/25/18 2:44 PM, Dario Faggioli wrote:
On Thu, 2018-10-25 at 14:36 +0200, Milan Boberic wrote:
On Thu, Oct 25, 2018 at 1:30 PM Julien Grall <julien.grall@xxxxxxx>
  Do you have DEBUG enabled?

I'm not sure where exactly should I disable it. If you check line 18
in xl dmesg file in attachment it says debug=n, it's output of xl
dmesg. I'm not sure if that is the DEBUG you are talking about.

Yes, this mean debug is *not* enabled. Which is the correct setup for
doing performance/latency evaluation.

It might, OTOH, be wise to turn it on when investigating the system
behavior (but that's a general remark, I don't know to what Julien was
referring to in this specific case).

The narrow down the discrepancies during the measurement, I wanted to check whether Milan were doing the performance measurement with debug enabled.

Now I can tick off DEBUG been a potential cause of the latency/performance.


Julien Grall

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