I hat very good experience with using buffer variables to copy-"prefetch" unpredictable costly fetches. E.g. from cache lines that get touched by several cores

I hat very good experience with using buffer variables to copy-"prefetch" unpredictable costly fetches. E.g. from cache lines that get touched by several cores for communication. And I only actual use them after one iteration of whatever I do. So the core could fetch the memory content without actually having to stall because I do not use it until later. I'm not sure how realistic that is inside a kernel thread scheduler, but it sure is useful in user space for task based libraries.