sched/topology: Optimize topology_span_sane()

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Optimize topology_span_sane() by removing duplicate comparisons.

Since topology_span_sane() is called inside of for_each_cpu(), each
previous CPU has already been compared against every other CPU. The
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.

Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Acked-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Yury Norov <yury.norov@gmail.com>

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Kyle Meyer 2024-04-10 16:33:11 -05:00 • committed by Yury Norov

parent 6802f93479

commit 05037e5f0f

1 changed files with 2 additions and 4 deletions

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kernel/sched/topology.c

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