> It means one cache's id is unique in all caches with same cache index number. > For example, in all caches with index3 (i.e. level3), cache id 0 is unique to > identify > a L3 cache. But in caches with index 0 (i.e. Level0), there is also a cache > id 0. > So cache id is unique in one index. But not unique in two different index.
> Does that make sense? I hope I express that correctly. We use "index" rather than "level" because that is the terminology used in /sys/devices/system/cpu/cpu*/cache/index* E.g. on most Intel cpus you'll typically find "index0" is the L1-data cache, "index1" is the L1-instruction cache, "index3" is the L2-unified cache and "index4" is the L3-unified cache. -Tony