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Re: [Xen-devel] HVM and free_memory query
| To: | Apoorva Kulkarni <apoorva@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] HVM and free_memory query |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 10 Jul 2009 19:41:33 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 10 Jul 2009 11:42:06 -0700 |
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| Thread-topic: | [Xen-devel] HVM and free_memory query |
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On 10/07/2009 19:33, "Apoorva Kulkarni" <apoorva@xxxxxxxxx> wrote: > Thank you for your quick response. That helps a lot. > > In our case we need to know precisely how much overhead memory is > required by xen per domain. So is it okay for us to assume that it will > always be under 0.8% or could there be exceptions to this (e.g. > different fractions for a Solaris 10 HVM vs Windows HVM) ? Precisely, the overhead is determined by xend as: 8kB per 1MB of guest memory, plus 1MB per guest virtual cpu. See xen/xend/image.py:X86_HVM_ImageHandler:getRequiredShadowMemory() -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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