Thanks both for the fast response! I upgraded to 3.2 kernel from the unstable and now I get the right ones: http://dl.dropbox.com/u/258337/lstop_odysseus_1.4.1_kernel3.2.pdf
I generally like to stick with Debian stable because I never got any problem. While with unstable or Ubuntu I get some not so pleasant glitches from time to time. Thanks a lot! Petros On Thu, Apr 19, 2012 at 14:05, Brice Goglin <brice.gog...@inria.fr> wrote: > Hello, > > This is a longstanding kernel bug. It was finally fixed recently in kernel > 3.3 and backported in 3.2.9 and 3.0.23. Not sure if the Debian kernel devs > would accept backporting it to squeeze. The relevant commit is. > > commit 32c3233885eb10ac9cb9410f2f8cd64b8df2b2a1 > Author: Andreas Herrmann <andreas.herrma...@amd.com> > <andreas.herrma...@amd.com> > Date: Wed Feb 8 20:52:29 2012 +0100 > > x86/amd: Fix L1i and L2 cache sharing information for AMD family 15h > processors > > For L1 instruction cache and L2 cache the shared CPU information > is wrong. On current AMD family 15h CPUs those caches are shared > between both cores of a compute unit. > > This fixes https://bugzilla.kernel.org/show_bug.cgi?id=42607 > > > If you need to stay with an old kernel that can't be fixed for this > machine, we can provide you with a corrected XML topology. > > Brice > > > > > On 19/04/2012 13:51, Petros Aristidou wrote: > > Hi everyone, > > I run lstopo on my 4-socket 6238, Supermicro system and I get the > following figures: http://dl.dropbox.com/u/258337/lstop_odysseus_1.4.1.pdfand > http://dl.dropbox.com/u/258337/lstopo_verbose.txt > > It shows that each socket has 2 numanodes with 6 cores each. It shows a > shared L3 memory but dedicated L2 and L1. In other references, like: > > http://www.olcf.ornl.gov/wp-content/uploads/2012/01/TitanWorkshop2012_Day1_AMD.pdf > http://www.siliconmechanics.com/files/BulldozerInterlagosInfo.pdf and > http://www.hpc2n.umu.se/resources/abisko/cpuarch > I get that L1 is dedicated, L2 is shared by 2 cores and L3 shared by all 6 > in the numanode. > > What's the truth? Is lstopo wrongly reporting that? > > I am running the latest stable version of Debian Linux (6.0.4 Squeeze) > with all updates and have hwloc v1.4.1 installed. > > Any insight is welcome! > > Petros > > > _______________________________________________ > hwloc-users mailing > listhwloc-users@open-mpi.orghttp://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > > > > _______________________________________________ > hwloc-users mailing list > hwloc-us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >
