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From: "Carsten Schiers" <carsten@schiers.de>
To: "konrad.wilk" <konrad.wilk@oracle.com>
Cc: linux <linux@eikelenboom.it>, xen-devel <xen-devel@lists.xensource.com>
Subject: AW: Re: Re: Re: AW: Re: AW: Load increase after memory upgrade?
Date: Wed, 29 Jun 2011 23:17:53 +0200	[thread overview]
Message-ID: <H0000067000b4f61.1309382272.uhura.space.zz@MHS> (raw)
In-Reply-To: <20110628203421.GC23212@dumpdata.com>

> 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 
reducing
Xen to 4GB by the parameter. Load seems to be still a little, little bit 
lower
with Xenified Kernel (8-9%), but this is drastically lower than the 20% 
we had
before.

What to do next, Konrad?

Carsten.

  reply	other threads:[~2011-06-29 21:17 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-27 11:29 AW: Load increase after memory upgrade? Carsten Schiers
2011-06-27 13:46 ` Konrad Rzeszutek Wilk
2011-06-27 15:37   ` Sander Eikelenboom
2011-06-27 20:00     ` AW: " Carsten Schiers
2011-06-27 20:20       ` Sander Eikelenboom
2011-06-27 20:44         ` AW: " Carsten Schiers
2011-06-27 20:46         ` Carsten Schiers
2011-06-28 14:57           ` Konrad Rzeszutek Wilk
2011-06-28 20:17             ` AW: " Carsten Schiers
2011-06-28 20:22             ` Carsten Schiers
2011-06-28 20:34               ` Konrad Rzeszutek Wilk
2011-06-29 21:17                 ` Carsten Schiers [this message]
2011-06-30 22:00                   ` Konrad Rzeszutek Wilk
2011-06-28 14:50       ` Konrad Rzeszutek Wilk
2011-06-28 20:34     ` AW: " Carsten Schiers
2011-06-27 19:56   ` Carsten Schiers
2011-06-28 14:49     ` Konrad Rzeszutek Wilk

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