Messages in this thread |  | | Date | Thu, 10 Jan 2013 00:27:23 -0200 | From | Rafael Aquini <> | Subject | Re: [PATCH 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning |
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On Wed, Jan 09, 2013 at 06:20:35PM +0530, Raghavendra K T wrote: > I ran kernbench on 32 core (mx3850) machine with 3.8-rc2 base. > x base_3.8rc2 > + rik_backoff > N Min Max Median Avg Stddev > x 8 222.977 231.16 227.735 227.388 3.1512986 > + 8 218.75 232.347 229.1035 228.25425 4.2730225 > No difference proven at 95.0% confidence
I got similar results on smaller systems (1 socket, dual-cores and quad-cores) when running Rik's latest series, no big difference for good nor for worse, but I also think Rik's work is meant to address bigger systems with more cores contending for any given spinlock.
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