This is true even at the CPU cache level so it's probably going to trickle down all the way.
For example Jon G gave a talk at Jane Street about how he had a mysterious performance bug that was later attributed to cores fighting over the same cache line
For example Jon G gave a talk at Jane Street about how he had a mysterious performance bug that was later attributed to cores fighting over the same cache line
https://youtu.be/tND-wBBZ8RY?is=624w3YoDN2QYBWuD