Re: [Xen-users] understanding xm top

["Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>]

On 15 Nov 2006 at 14:53, Tommie McAfee wrote:

> >  If xm top shows 10% CPU utilization for domain0, it means the CPU
> > utilization in domain0 is 10% of FOUR physcial CPUs. Is this right?
> >
> 
> 
> I  don't think the values scale that way percentage wise, because with 4
> physical cpu's, xm-top can show CPU(%) to be as high as 400%.  Unlike the

IMHO that's about as stupid as this output from procinfo:

idle  :   3d 16:05:53.82  99.8%
uptime:      22:03:12.95

How can the idle time be longer than the uptime? How can the CPU usage be more 
than 100%?

> native Linux top command where the scale is 0-100%, if you have 4 cpu's and
> xm top shows 100% it doesn't mean that your using 100% of 4 physical cpu's
> (all your processing power), but perhaps 1/4 of your 4 CPU's.
> 
> try doing a 'xm top', and type 'v' on the console window, this should give
> you a per-cpu break down of each domain,

[...]

Ulrich


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