From mboxrd@z Thu Jan  1 00:00:00 1970
From: Apoorva Kulkarni <apoorva@3tera.com>
Subject: Re: HVM and free_memory query
Date: Fri, 10 Jul 2009 11:48:01 -0700
Message-ID: <4A578CE1.7030106@3tera.com>
References: <C67D49ED.F538%keir.fraser@eu.citrix.com>
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Keir Fraser wrote:
> On 10/07/2009 19:33, "Apoorva Kulkarni" <apoorva@3tera.com> 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
>   

Exactly what we were looking for. Thanks a ton.

--
Apoorva Kulkarni
3Tera, Inc.