Re: [Xen-API] CloudLinux on Xen

[R J <torushikeshj@xxxxxxxxx>]

Hi Brooks,

Thanks for the reply.
I have X5650 node with 24 CPUs. This is Dual Socket Hexacore machine.

I used XenCenter to monitor the node and it showed 2 vCPUs for that DomU. I rechecked it with vm-param-list, it showed 2.
When I checked /proc/cpuinfo in DomU, it shows 32.

Regards,
R J

On Mon, Oct 24, 2011 at 9:57 PM, <brooks@xxxxxxxxxxx> wrote:

On Mon, 24 Oct 2011, R J wrote:

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

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