Generally caches aren't considered to be "memory" in this sense or otherwise every multi-core chip would be considered NUMA since they all have private caches.

Generally caches aren't considered to be "memory" in this sense or otherwise every multi-core chip would be considered NUMA since they all have private caches. Instead you normally talk about an architecture being NUMA when cores have different access speeds to different parts of main memory, as when you need to get another socket to forward you information from a RAM bank. This is something that the OS generally has to be aware of in scheduling decisions, unlike caches which are automatically managed by hardware.