Re: [Xen-users] Why is Processor Utilization So High within the

To:	Javier Guerra <javier@xxxxxxxxxxx>
Subject:	Re: [Xen-users] Why is Processor Utilization So High within the DomU?
From:	Thiago Camargo Martins Cordeiro <thiagocmartinsc@xxxxxxxxx>
Date:	Wed, 25 Mar 2009 14:46:58 -0300
Cc:	"Robinson, Eric" <eric.robinson@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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Yeah! I agree!

2009/3/25 Javier Guerra <javier@xxxxxxxxxxx>

On Wed, Mar 25, 2009 at 12:37 PM, Robinson, Eric <eric.robinson@xxxxxxxxx> wrote:

We have a 12-core Xeon server with 32GB RAM. On it we have a 1-VCPU DomU
running a Windows 2003 Std. R2 terminal server. When I run PerfMon
within Windows, I see that processor utilization runs very high, on
average 30-50%. Before we virtualized this server, it was running on a
4-core machine with 16GB RAM and processor utilization averaged 5-20%.
Why so much higher now in a DomU environment?

if it was 5-20% on a 4-core, a naïve calculation means going to a 1-core (virtual or not) should get 20-80%

doesn't sound so far off

--
Javier

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Re: [Xen-users] Why is Processor Utilization So High within the DomU?