Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs

Chuck Swiger wrote:

Unfortunately, there are simply different tradeoffs between mechanisms for copying depending on whether you want to use or avoid using/thrashing the L1/L2 caches, whether the data is cache-aligned, and so forth; the CPU can't infer what you want to occur-- you have to tell it. I find it interesting that some of the architectures (PA-RISC,


Well, of course there are some special cases, but in general there should be some baseline suitable for most of uses. That's why we (and most other operating systems) only provide single version for the mem*(3) APIs.

-Maxim
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