Hi Andi, Thanks for the reply. E7520 have 4 cores (and 8 threads, though I assume that is irrelevant) but in a dual-socket configuration shouldn't I see total of 8 CBoxes? 4 CBoxes for each E7520 processor ?
Cheers, -- Animesh Andi Kleen <a...@firstfloor.org> wrote on 11/28/2012 09:33:22 PM: > From: Andi Kleen <a...@firstfloor.org> > To: Animesh K Trivedi1/Zurich/IBM@IBMCH, > Cc: linux-perf-users@vger.kernel.org, Bernard Metzler <b...@zurich.ibm.com> > Date: 11/28/2012 09:33 PM > Subject: Re: cboxes on NehalemEX > > Animesh K Trivedi1 <zrl...@ch.ibm.com> writes: > > > Hi all, > > > > I'm testing/using uncore support on a dual socket NehalemEX (Xeon E7520) > > box on 3.7-rc1. > > It shows me only 4 CBOXes under devices. Although the document (Uncore > > programming > > for 7500) says that there should be 8 CBOXes. Am I missing something? > > The number of CBOXes depends on the number of CPU cores in the socket. > Each core has a CBOX. You would only see 8 on a 8 core CPU. > > > > get a global view of LLC behaviour shouldn't I have to sum up the count of > > events from all > > physical processor's CBOXes. > > Yes. Each BOX has its own counters. > > -Andi > > -- > a...@linux.intel.com -- Speaking for myself only > -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
