c - What does sched_yield do in this case? -

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if have process threads running on different cores, sched_yield in case? relinquished , issued again? because see sched_yield not cause thread calling it, wait cycles @ all, seems call not going kernel.

the man page says:

if calling thread thread in highest priority list @ time, continue run after call sched_yield().

so if there's nothing more important run, function nothing.


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