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Re: [Xen-devel] [PATCH] improve x86 page table handling performance
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] improve x86 page table handling performance |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 27 Mar 2007 08:44:52 +0100 |
| Delivery-date: | Tue, 27 Mar 2007 00:42:55 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] improve x86 page table handling performance |
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On 27/3/07 07:22, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> The single change to pte_clear() yields a 25-30% boost for kernel builds >> on a 4x2x2 CPUs, 8Gb box; the other changes together yield improvements >> of 2-5%. > > I shall clarify that this is for the PAE case only (i.e. resulting from the > folding of two page faults into a single hypercall, which is being used in the > kmap path). Spotted that. The patch is pretty big but I think probably all good. I've been away for a week so catching up on patches... -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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