https://triumphpc.github.io/blog/tags/golang/ Recent content in Golang on Sebastian PE — Go, AI & Engineering https://triumphpc.github.io/blog/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://triumphpc.github.io/blog/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo en Thu, 18 Jun 2026 00:00:00 +0000 https://triumphpc.github.io/blog/posts/sync-mutex-atomic/ Thu, 18 Jun 2026 00:00:00 +0000 https://triumphpc.github.io/blog/posts/sync-mutex-atomic/ Mutex and atomic are not two independent tools — they are one stack of abstractions. I dig through the stack from data race to starvation mode: why x++ is three ARM64 instructions, how CAS became a universal primitive (Herlihy 1991), why Mutex is built on top of atomic CAS, and how Russ Cox’s barging-vs-handoff debate (issue #13086) gave Go its 1ms starvation threshold. With public benchmarks, the bit layout of Mutex state, and a cheatsheet for when to reach for which.