https://jasper-aa64.github.io/zh/tags/futex/Recent content in Futex on JasperHugozh-CNWed, 21 Oct 2026 00:00:00 +0000https://jasper-aa64.github.io/zh/posts/spinlock-implementation/Wed, 21 Oct 2026 00:00:00 +0000https://jasper-aa64.github.io/zh/posts/spinlock-implementation/自旋锁快不快，看等锁的核在干什么：每次都读改写，就把锁所在的行抢来抢去；先读后抢、循环里加 PAUSE、抢输了退一步，等的时候才几乎不打扰持锁的核。