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by snovv_crash 2377 days ago
The infection is the other way around here, the producer thread is slowed down due to a low priority of the consumer.

TLDR for article: the consumer has a lower priority and pauses on the context switch of the mutex lock, but doesn't get rescheduled for a while. The producer then has to wait for the consumer to get rescheduled and unlock the mutex before it can enqueue something.