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Re: [Xen-users] Xen DomU (vt-x) reports CPU utilization ZERO!!!

from [Ulrich Windl]

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To:	"Liang Yang" <multisyncfe991@xxxxxxxxxxx>
Subject:	Re: [Xen-users] Xen DomU (vt-x) reports CPU utilization ZERO!!!
From:	"Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>
Date:	Thu, 09 Nov 2006 08:47:39 +0100
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On 8 Nov 2006 at 17:43, Liang Yang wrote:

> Hello,
> 
> It seems Linux kernel under Xen DomainU (full-virtualized mode) reports the 
> CPU utilization incorrectly. All CPU utilization data reported under 
> /proc/stat are 0.
> 
> Anyone has any idea about how to solve this issue?

Hi!

I think(!) that the CPU usage is lower that usual, because the scheduling 
overhead 
and real I/O stuff is don in Dom0 invisible to DomUs. While my load is really 
quite low now, it's not exactly zero (in DomU):

top - 08:46:08 up 6 days, 43 min,  1 user,  load average: 0.00, 0.00, 0.00
Tasks:  73 total,   2 running,  71 sleeping,   0 stopped,   0 zombie
Cpu0  :  0.1%us,  0.0%sy,  0.0%ni, 99.8%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st

See, I have a little CPU usage ;-)

Regards,
Ulrich


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