More complete implementation of CachePadded

[tinco]

Hi, I'm not sure if more platforms are interesting to you, but I've made a slightly more complete implementation of padding a struct to the cache line size here:

https://github.com/tinco/cache_line_size

I got the information on the cache line sizes from the Go compiler repository, so I'm pretty sure these are correct for all platforms Go runs on, which is a whole bunch.

Thank you! :) It would be great to have those in our CachePadded

[novacrazy]

Something else to keep in mind is the difference in cache line size between Intel and AMD.

znver1 and znver2 are the target-cpu values for Zen 1 and Zen 2 AMD CPUs, and I think they have slightly smaller cache line sizes than modern Intel CPUs.