It was in response to this blog post: https://probablydance.com/2019/12/30/measuring-mutexes-spinlocks-and-how-bad-the-linux-scheduler-really-is/ https://probab

It was in response to this blog post: https://probablydance.com/2019/12/30/measuring-mutexes-spinlocks-and-how-bad-the-linux-scheduler-really-is/ https://probablydance.com/2019/12/30/measuring-mutexes-spinl... Basically your standard CAS loop with _mm_pause() to yield.