From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Carsten Schiers" Subject: AW: Re: Re: Re: AW: Re: AW: Load increase after memory upgrade? Date: Wed, 29 Jun 2011 23:17:53 +0200 Message-ID: References: <20110628203421.GC23212@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110628203421.GC23212@dumpdata.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "konrad.wilk" Cc: linux , xen-devel List-Id: xen-devel@lists.xenproject.org > Lets first do the c) experiment as that will likely explain your load=20 average increase. =2E.. > >c). If you want to see if the fault here lies in the bounce buffer=20 > being used more > >often in the DomU b/c you have 8GB of memory now and you end up using=20 > more pages > >past 4GB (in DomU), I can cook up a patch to figure this out. But an=20 > easier way is > >to just do (on the Xen hypervisor line): mem=3D4G and that will make=20 > think you only have > >4GB of physical RAM. If the load comes back to the normal "amount"=20 > 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=20 reducing Xen to 4GB by the parameter. Load seems to be still a little, little bit=20 lower with Xenified Kernel (8-9%), but this is drastically lower than the 20%=20 we had before. What to do next, Konrad? Carsten.