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AW: Re: Re: Re: AW: Re: [Xen-devel] AW: Load increase after memory upgra

To: "konrad.wilk" <konrad.wilk@xxxxxxxxxx>
Subject: AW: Re: Re: Re: AW: Re: [Xen-devel] AW: Load increase after memory upgrade?
From: "Carsten Schiers" <carsten@xxxxxxxxxx>
Date: Wed, 29 Jun 2011 23:17:53 +0200
Cc: linux <linux@xxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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> Lets first do the c) experiment as that will likely explain your load 
average increase.
> >c). If you want to see if the fault here lies in the bounce buffer 
> being used more
> >often in the DomU b/c you have 8GB of memory now and you end up using 

> more pages
> >past 4GB (in DomU), I can cook up a patch to figure this out. But an 
> easier way is
> >to just do (on the Xen hypervisor line): mem=4G and that will make 
> think you only have
> >4GB of physical RAM.  If the load comes back to the normal "amount" 
> then the likely
> >culprit is that and we can think on how to fix this.

You are on the right track. Load was going down to "normal" 10% when 
Xen to 4GB by the parameter. Load seems to be still a little, little bit 
with Xenified Kernel (8-9%), but this is drastically lower than the 20% 
we had

What to do next, Konrad?


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