Re: [uml-user] Running UML over Vmware

[Flavio <fbc...@gm...>]

2008/7/5 David Fernández <da...@di...>:
>
> Hi,
>
> I am making some tests running UML inside an Ubuntu-8.04-jeos running over Vmware ESX, but the performance I get is very poor compared to running UML directly over a native Ubuntu.
>
> For example, starting a virtual machine takes almost three times more over ESX:
>
> Ubuntu-jeos over VMware ESX in an Intel Xeon 3040@1.86GHz --> 32 secs
>
> Ubuntu 8.04 Desktop over an Intel Core2 6400@2.13GHz --> 12 secs
>
> The Ubuntu-jeos running over ESX has the VMware tools installed.
>
> Any hint about the cause of this big performance difference? Should the installation of the SKAS3/4 patch on the host help to solve it?
Hello,

try the skas4 patch for 2.6.24 kernel on both guest and host kernel
(skas3 is not longer supported).
Maybe you will have some performance increment. Note that most of the
times, virtualization my slow down guest processes. Using a
paravirtualization system (like XEN) may not decrease your guest
performances so much.

Regards,

Flavio

>
> Thanks in advance and best regards;
> David
>
> P.D: guest machines are running kernel 2.6.24.3 and the host is running 2.6.24-19-virtual in the ESX host and 2.6.24-17-generic in the other.
>
>
>
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