Re: [Xen-users] Performance issues

[Matt Ayres <matta@xxxxxxxxxxxx>]

Guillaume Thouvenin wrote:
> On Tue, 11 Apr 2006 16:58:34 +0200
> Stephan Austermühle <au@xxxxxxx> wrote:
>
> > The performance loss is greater than what I have expected. Can anybody
> > confirm the dimension of the performance loss? Are these values normal
> > for a Xen setup?
> Hello Stephan, hello everybody,
>
>  I also did some performance tests. I put them on a web page so you can
> have a look in order to compare with your results. The web page is
> still under development and results needs a more accurate analysis but
> it can give some hints. Here is the url:
>
> http://www.bullopensource.org/xen/benchs.html
The compile tests are interesting. There is a variable being overlooked 
by everyone -- the Xen scheduler.  The SEDF scheduler is not necessarily 
the best for every workload. Would you mind re-running the first part of 
the tests (or all if you have the time), but use the BVT scheduler 
instead?  To set CPU weights you can use the cpu_weight variable in the 
domain config file (ex. cpu_weight = "2").  libxc/xc_domain.c seems to 
still use that method for setting the weight. Note it does not use 
cpu_weight for SEDF. Also, in 3.0.2 you can run "xm sched-sedf domid" to 
get settings, no need for the external sedf program.
I am running my own tests currently, but I don't create pretty 
graphs/websites :)
Thank you,
Matt Ayres

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