Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 11 Apr 2024 13:38:46 +0300 | From | Andy Shevchenko <> | Subject | Re: [PATCH v2 2/2] sched/topology: Optimize topology_span_sane() |
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On Wed, Apr 10, 2024 at 04:33:11PM -0500, Kyle Meyer wrote: > Optimize topology_span_sane() by removing duplicate comparisons. > > Since topology_span_sane() is called inside of for_each_cpu(), each > pervious CPU has already been compared against every other CPU. The
previous
> current CPU only needs to be compared against higher-numbered CPUs. > > The total number of comparisons is reduced from N * (N - 1) to > N * (N - 1) / 2 on each non-NUMA scheduling domain level.
Thank you, now it makes sense.
-- With Best Regards, Andy Shevchenko
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