Re: [Xen-users] How set up CPU time

[Diego Parasecoli <diegoparasecoli@xxxxxxxxxxxxx>]

Nitesh Gangarde, Noida ha scritto:
> HI
>
>
> Yes you can restrict the virtual machine to use the % of cpu. This can
> be done through 
> Suppose you have a 2 virtual machine in your system. So you can give a 
> Weight in such a ratio so that one virtual machine can use 20% cpu.
> For ex:
> Suppose you have provided the domain0 a weight 1
> Command for giving the weight is:  xm sched-sedf <domain id> -e 0 -w 1
> Vm01 ---virtual machine 1 ---> weight 2
> Command for giving the weight is:  xm sched-sedf <domain id> -e 0 -w 2
> Vm02 ---virtual machine 2 ---> weight 3
> Command for giving the weight is:  xm sched-sedf <domain id> -e 0 -w 3
>
> And set the extra time option in xm sched-sedf to 0.
>
> Now se all the virtual machine will use cpu in this propotion only.
> 1:2:3 = 16.5%:33%:51%
> Means domain0 will use only 16.5% cpu
> Vm01 use only 33% cpu
> Vm02 use only 51% cpu.
>
> I hope it is cleared to you. If you do have any problem let me know I
> will elaborate it.
>
> Thanks and regards
> Nitesh Gangrade
>
>
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Diego
> Parasecoli
> Sent: Friday, July 21, 2006 2:16 PM
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] How set up CPU time
>
> Hi all,
> i know that for each virtual machine i can set up a number of vcpu. But 
> if i want to give only a % of the real CPU? For example: how can i set 
> up a virtual domain for using only 20% of the real CPU? is it possible?
> Ty in advance
>
> D.
>
>
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>   
Ty, so if i want to give only 10% of the cpu time i must set the weight 
as follow:
Dom0 16
Vm01 2
Vm02 2


16:2:2 = 80%:10%:10%


Is it right? and this configuration is permanent after a reboot?

ty

D.


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