Messages in this thread | | | Date | Fri, 8 Jul 2016 20:07:46 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH v2 2/3] Documentation, ABI: Add a document entry for cache id |
| |
* Luck, Tony <tony.luck@intel.com> wrote:
> > 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*
Who can we ... thank for that nonsensical naming? :-/
> 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.
Crazy. What was wrong with using 'level' or 'depth'?
Thanks,
Ingo
| |