Messages in this thread | | | Date | Fri, 9 Oct 2009 10:54:52 +0200 | From | Jens Axboe <> | Subject | Re: [rfc][patch] store-free path walking |
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On Thu, Oct 08 2009, Nick Piggin wrote: > This is actualy nice too. My tests were on a 2s8c Barcelona system, > but this is showing we have a nice serial win on Nehalem as well. > Actually K8 CPUs have a bit faster lock primitives than earlier > Intel CPUs I think (closer to Nehalem), so we might see an even > bigger win with a Core2.
Ran it on another box. This isn't quite a core 2 though, it's a sparc64 (Niagara 2). It has 64 threads, too, but just 8 cores.
2.6.32-rc3 serial real 0m5.390s user 0m1.340s sys 0m2.970s
2.6.32-rc3 parallel real 0m2.009s user 0m0.900s sys 0m2.490s
vfs serial real 0m4.816s user 0m1.250s sys 0m2.270s
vfs parallel real 0m1.967s user 0m0.920s sys 0m1.960s
So it's a win-win there on that platform too.
-- Jens Axboe
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