10 ms·
Also on alpha there's only store-store and full memory barriers. Acquire is very expensive.
by bonzini 9mo ago
Also on alpha there's only store-store and full memory barriers. Acquire is very expensive.
- gpderetta 9mo agoIndeed. On the other hand recently ARM has added explicit load acquires primitives which are relatively cheap, so converting a consume to an acquire is not a big loss (and Linus considered doing it for the kernel a while ago just to avoid having to think too hard about compiler optimizations).