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Re: [Xen-devel] [PATCH] improve x86 page table handling performance
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| Subject: | Re: [Xen-devel] [PATCH] improve x86 page table handling performance |
| From: | "Jan Beulich" <jbeulich@xxxxxxxxxx> |
| Date: | Tue, 27 Mar 2007 07:22:30 +0100 |
| Delivery-date: | Mon, 26 Mar 2007 23:42:11 -0700 |
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>>> "Jan Beulich" <jbeulich@xxxxxxxxxx> 26.03.07 16:50 >>> >Where possible, >- use hypercalls instead of writing to read-only pages >- fold TLB flushes into page table update hypercalls >- on PAE, use single-access updates instead of two-access ones > >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). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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