Re: [Xen-users] vcpus and the virtual machine manager

To:	Mike Sievers <saturngeist@xxxxxxxxxxxxxx>
Subject:	Re: [Xen-users] vcpus and the virtual machine manager
From:	Diego Dave <diego.dave.s@xxxxxxxxx>
Date:	Thu, 25 Aug 2011 19:56:09 +0200
Cc:	xen-users <Xen-users@xxxxxxxxxxxxxxxxxxx>
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Hi Mike,

"vcpus" option set the virtual cpus, not the physical cpus to use.

If your server have 8 cpus, they are numbered from 0 to 7.

If you want to assign the last 4 physical cpus, you must add to the
DomU cfg file the option "cpus = '4-7'. Then you can see the assigning
using "xm vcpu-list" in command line.

Is very good practice to manage the cpu assigning, it increases the
performance of VMs, and avoid problems when sharing cpus, like
freezing because of I/O events.

Regards,

Diego

2011/8/25 Mike Sievers <saturngeist@xxxxxxxxxxxxxx>:
> Hi List,
>
> with vcpus=4 I can choose the number of cpus.
>
> My virtual machine manager GUI shows:
> Maximum allocation: 2
> Host CPUs: 8
>
> How do I increase the maximum allocations?
>
> Best,
> Mike
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>

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Re: [Xen-users] vcpus and the virtual machine manager