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Re: [Xen-users] Performance issues

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:


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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