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Spinlocks vs. Mutexes: When to Spin and When to Sleep
https://howtech.substack.com/p/spinlocks-vs-mutexes-when-to-spin

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Substack Spinlocks vs. Mutexes: When to Spin and When to Sleep You’re staring at perf top showing 60% CPU time in pthread_mutex_lock. Your latency is in the toilet. Someone suggests “just use a spinlock” and suddenly your 16-core server is pegged at 100% doing nothing useful. This is the synchronization primitive trap…
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