Re: xen 4.5.0 rtds scheduler perform poorly with 2vms

[Dario Faggioli <dario.faggioli@citrix.com>]

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On Wed, 2015-12-02 at 11:03 +0000, Lars Kurth wrote:
> > On 2 Dec 2015, at 05:54, Meng Xu <xumengpanda@gmail.com> wrote:
> > 
> > Maybe we could add some health warning and add a link to this
> > discussion?
> > Misconfiguration of the system will usually cause performance
> > degradation, even for the other schedulers, such as ARINC653,
> > credit,
> > credit2.
> 
> That is the minimum IMHO for the wiki and xl.
> 
I'm not so sure. Perhaps just a quick hint, in xl manpage, I'd say.

> > What I'm thinking is how much expert information we should expose
> > to
> > users. Sometimes, exposing too much information may not be so
> > helpful.
> > Sometimes, more information just  cause more confusion.
> 
> Maybe just link to some of the theory on real-time schedulers (at
> least on the wiki). Maybe also to a couple of links to xen-devel@
> threads like this one.
> 
We can reference the thread on the wiki, and we can put a few sentences
about all this there. However, trying to link "some relevant theory" is
unpractical, as it won't be easy to define what both "some" and
"relevant" mean. :-)

I'd be in favour (and ca do so) of adding a reference to the RT-Xen
website, and maybe to one of (the original?) RT-Xen paper. But nothing
more.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)


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