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Re: [Qemu-devel] %cpu used by qemu-kvm processes
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] %cpu used by qemu-kvm processes |
Date: |
Fri, 19 Feb 2016 12:01:27 +0000 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Fri, Feb 19, 2016 at 11:58:38AM +0000, Jean-Pierre Ribeauville wrote:
> Hi,
>
> My Guest users ask me why , from Host point of view , there is a big
> difference interm of CPU % used by qemu-kvmcontrolling processs :
>
> Result of "top" on the host :
>
> For Windows guests:
>
> 8680 qemu 20 0 4939588 4.092g 9668 S 12.6 8.7 927:46.78 qemu-kvm
> 47377 qemu 20 0 2903560 2.121g 9676 S 11.6 4.5 587:08.42 qemu-kvm
>
> For Linux Guests:
>
> 120443 qemu 20 0 4832180 1.312g 9628 S 1.7 2.8 59:43.79 qemu-kvm
> 43224 qemu 20 0 4825724 2.235g 9664 S 1.0 4.8 105:27.18 qemu-kvm
> 44894 qemu 20 0 4864728 1.450g 9648 S 1.0 3.1 41:30.73 qemu-kvm
> 45000 qemu 20 0 4862676 1.508g 9648 S 0.3 3.2 39:41.45 qemu-kvm
>
>
> These guests are just booted , nothing special running on it as shown by
> "top" ran on the Linux Guest :
>
> %Cpu(s): 0.0 us, 0.2 sy, 0.0 ni, 99.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0
> st
>
> Or on the Windows Guest
>
> C:\Users\Administrator>wmic cpu get loadpercentage
> LoadPercentage
> 0
> 0
>
> Any idea to help me to answer them ?
At the very least please show the command line arguments used to boot
the windows guests, and the arguments used with the Linux guests. The
choice of hardware config can have a significant impact on performance
of different guests
Regards,
Daniel
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