[OpenMP] Improve performance of ticket lock (x86) #143557
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Ticket lock has a yield operation which degrades performance on larger server machines due to an unconditional pause operation.
hansangbae
reviewed
Jun 10, 2025
| @@ -720,8 +720,6 @@ int __kmp_release_ticket_lock(kmp_ticket_lock_t *lck, kmp_int32 gtid) { | |||
| std::atomic_fetch_add_explicit(&lck->lk.now_serving, 1U, | |||
| std::memory_order_release); | |||
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| KMP_YIELD(distance > | |||
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Should we also remove line 715--718?
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Ticket lock has a yield operation which degrades performance on larger server machines due to an unconditional pause operation.