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Re: [Xen-devel] How much memory does a domain REALLY use...

  • To: "Graham, Simon" <Simon.Graham@xxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Sat, 24 Feb 2007 09:03:19 +0000
  • Delivery-date: Sat, 24 Feb 2007 01:02:23 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdXsilmiwy4S98FTPqiaqV0JXsxkgAQHcfA
  • Thread-topic: [Xen-devel] How much memory does a domain REALLY use...

On 24/2/07 01:21, "Graham, Simon" <Simon.Graham@xxxxxxxxxxx> wrote:

> . First, the biggie -- swiotlb; if I'm not mistaken, this allocates 64MB
> from the domain
>   heap (in addition to the 64MB of low memory in the domain itself).
> Allocated with
>   xen_create_contiguous_region in 256KB chunks.

Xen_create_contiguous_region() gives up the existing RAM and replaces with a
new contiguous extent, so it shouldn't allocate net extra memory.

How are you determining amount of RAM used: xm info and looking at freemem?
Or xm list and look at memory usage for dom0?

 -- Keir

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