Re: [Xen-devel] Xen optimization

[Julien Grall <julien.grall@xxxxxxx>]

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>
> > wrote:
> > >   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.

Cheers,

--
Julien Grall

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