Messages in this thread | | | Date | Thu, 14 Aug 2008 10:18:45 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race with preemptible kernel and CPU hotplug |
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Jeremy Fitzhardinge wrote: > >> Xeon 2.0GHz >> >> >> Summary >> >> no lock prefix (s) with lock prefix (s) Speedup >> make -j1 kernel/ 33.94 +/- 0.07 34.91 +/- 0.27 2.8 % >> hackbench 50 2.99 +/- 0.01 3.74 +/- 0.01 25.1 % >> > > Yeah, that's more severe than I would have expected. Perhaps I have AMD > numbers in my head. >
He doesn't specify what kind of Xeon it is (there are three completely different CPUs under the Xeon brand name: P3 Xeon, P4 Xeon, and Core 2 Xeon), but I think it's a P4 Xeon.
Netburst sucked in so many ways, and this is one of them.
-hpa
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