Re: [Xen-API] CloudLinux on Xen

brooks@netgate.net
Mon, 24 Oct 2011 16:27:51 -0000

> I found a strange thing in XCP. CloudLinux provides xen kernel for DomUs
and
> after installing the CloudLinux in a DomU it actually got 32 cpus inside.
> I had assigned only 2 vCPU to that DomU. To confirm this I started
> generating load on that DomU and in no time it ate all my node''s
CPUs.

How many physical CPUs do you have installed and how did you verify
how many VCPUs your domU was allocated?  What does /proc/cpuinfo contain?

> Is it an expected behavior that one of your DomU can eat all node with few
> modifications in kernel ?
> Or is Paravirt not a Hardware Virtualized guest ?

You might want to take a look at the docs that describe how the
Credit Scheduler used in Xen works:

     http://wiki.xen.org/xenwiki/CreditScheduler