Re: performance trouble

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----- Original Message -----
From: "Avi Kivity" <avi@xxxxxxxxxx>
To: "David Cure" <kvm@xxxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx, "Vadim Rozenfeld" <vrozenfe@xxxxxxxxxx>
Sent: Tuesday, February 14, 2012 3:32:16 PM
Subject: Re: performance trouble

On 02/10/2012 12:09 PM, David Cure wrote:
> 		hello,
>
> Le Sun, Feb 05, 2012 at 11:38:34AM +0200, Avi Kivity ecrivait :
> > 
> > Please post a trace as documented in http://www.linux-kvm.org/page/Tracing.
>
> 	I made the trace : started just before the slow function launch
> and stoped just after. I start only one VM with 2 vcpus/16G RAM and only one
> user connected to the VM to launch the test.
>
> 	The trace file is too big to post here, I gzip it and the file
> is available here : http://www.roullier.net/report.txt.gz
>
> 	I hope you can find something strange.
>

It's reading the HPET like crazy.  There are also tons of interrupts. 
Please use the windows performance tools to see which devices trigger
these interrupts.

[VR]
+1 
Try Microsoft Windows Performance Toolkit from Windows SDK 
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=3138
It's really good.


The HPET issue will be fixed by the hyper-V enlightenments, but these
will take some time to cook.

You can also try vhost-net to improve networking latency.

-- 
error compiling committee.c: too many arguments to function

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