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Re: [Xen-ia64-devel][PATCH] optimization for windows
| To: | "Xu, Anthony" <anthony.xu@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-ia64-devel][PATCH] optimization for windows |
| From: | Jürgen Groß <juergen.gross@xxxxxxxxxxxxxxxxxxx> |
| Date: | Fri, 27 Apr 2007 11:27:44 +0200 |
| Cc: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 27 Apr 2007 02:26:18 -0700 |
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Xu, Anthony wrote: > This is optimization for windows 2003. > > Windows use region 4 and region 5 for identity mapping. > > I see ~3% improvement when running specjbb2005 on guest windows after > applying this patch. > Did I understand this correct? If Region 7 preferred page size is 8kB, Region 4 and 5 will be identity mapping, regardless of DomU type? This may work for windows (current version), but other DomUs might fail! Wouldn't it be better to have some generic features like "region x identity mapping with attributes y" which can be set via DomU configuration file? Juergen -- Juergen Gross Principal Developer IP SW OS6 Telephone: +49 (0) 89 636 47950 Fujitsu Siemens Computers e-mail: juergen.gross@xxxxxxxxxxxxxxxxxxx Otto-Hahn-Ring 6 Internet: www.fujitsu-siemens.com D-81739 Muenchen Company details: www.fujitsu-siemens.com/imprint.html _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel |
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