Re: [Xen-users] Need for precisions on SAR measures

[Javier Guerra <javier@xxxxxxxxxxx>]

On Wed, Mar 4, 2009 at 12:20 PM, Nicolas80 <dedestri@xxxxxxxxxxx> wrote:
>
> Hi,
>
>
> Javier Guerra Giraldez wrote:
>>
>> - sar doesn't know a bit about virtualization, therefore all its
>> measures are relative to the resources available to that VM
>>
>
> A question concerning this point :
> If all the measures are relative to the resources available, how can we
> explain that :

i stand corrected.  sar does know a small bit about
paravirtualization: the steal time is time that the (real) CPU is used
for other VMs.

there's a very readable explanation at
http://virt.kernelnewbies.org/ParavirtBenefits



-- 
Javier

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