Well imagine I could address memory on the CPU die like a register but say 1MB of memory, located right next to the normal place you put a cache. It does not h

Well imagine I could address memory on the CPU die like a register but say 1MB of memory, located right next to the normal place you put a cache. It does not have to be coherent I think. Process thrashing sounds like an issue though. I imagine if the address space is across all CPU cores then the software can pin to a core so that the access is local. Remote access to another CPU will be slow, but I'm not sure how great it is with caches anyway.