> From: Borislav Petkov [mailto:[email protected]] > Sent: Friday, July 01, 2016 11:29 AM > To: Luck, Tony <[email protected]> > Cc: Yu, Fenghua <[email protected]>; Thomas Gleixner > <[email protected]>; Ingo Molnar <[email protected]>; Anvin, H Peter > <[email protected]>; Peter Zijlstra <[email protected]>; > Stephane Eranian <[email protected]>; Shankar, Ravi V > <[email protected]>; Vikas Shivappa > <[email protected]>; linux-kernel <linux- > [email protected]>; x86 <[email protected]> > Subject: Re: [PATCH] cacheinfo: Introduce cache id > > On Fri, Jul 01, 2016 at 11:00:35AM -0700, Luck, Tony wrote: > > For CAT we only need the IDs to be unique at each level. Our tentative > > syntax for the schema file for CAT looks like this (for a theoretical > > system supporting CAT in both L2 and L3 with two L3 caches and eight > > L2 caches) > > > > L3:id0=fff;id1=ff0 > > L2:id0=3;id1=c;id2=30;id3=c0;id4=3;id5=c;id6=30;id7=c0 > > So wouldn't it be straightforward and natural to do the following > nomenclature (which basically suggests itself): > > ID<level>.<num>
We has prefix "L3" or "L2" in the syntax, id is for that level in each line.b > > ? > > So that the ID hierarchy above is: > > ID3.0 ID3.1 > ID2.0 ID2.1 ID2.2 ID2.3 ... ID2.7 > > I don't know if that's useful though. > > I mean, we have that info in the path anyway: > > /sys/devices/system/cpu/cpu0/cache/index3/id = 0xfff ... > > and so on. > > Whatever you do, as long as the nomenclature is documented somewhere, > say Documentation/x86/topology.txt, for example, we should be fine. > > -- > Regards/Gruss, > Boris. > > SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, > HRB 21284 (AG Nürnberg) > --
