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Re: [Xen-devel] RFC: Superpage/hugepage performance improvement
| To: | Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Dave McCracken <dcm@xxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] RFC: Superpage/hugepage performance improvement |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Tue, 06 Apr 2010 10:40:52 +0100 |
| Cc: | Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Tue, 06 Apr 2010 02:41:17 -0700 |
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| Thread-topic: | [Xen-devel] RFC: Superpage/hugepage performance improvement |
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On 06/04/2010 10:29, "Tim Deegan" <Tim.Deegan@xxxxxxxxxxxxx> wrote: >> To make this work I added two mmuext ops, one to mark a superpage and >> one to unmark it. This change makes a huge performance difference in >> the hugepage mapping (on the order of 50 times faster). > > Plus, presumably, some noticeable difference on a macro benchmark. (I > expect that's the case but I've been wrong before.) It's a very good question since we might expect that hugetlbfs users construct long-lived mappings. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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