Silly me ! I've just seen that Andrej reported exactly the same bug last month. I checked his .output file and it seems he got the same hardware than me. I see now why you said "yet another buggy AMD platform" !
Sorry guys. List-Post: hwloc-users@lists.open-mpi.org Date: Fri, 5 Sep 2014 13:46:25 +0200 From: brice.gog...@inria.fr To: hwloc-us...@open-mpi.org Subject: Re: [hwloc-users] hwloc error with "node interleaving" disabled Hello You sent the test.output file instead of test.tar.bz2 so I can't check for sure. Anyway I guess this is yet another buggy AMD platform with magny-cours/interlagos/abu-dahbi Opterons (61xx, 62xx or 63xx). Sometimes upgrading the BIOS/kernel helps. Sometimes not. Some L3 caches will be missing in the hwloc topology because of this bug, it's likely not important for the vast majority of HPC libraries. You may hide the warning by setting HWLOC_HIDE_ERRORS=1 in your environment. Brice Le 05/09/2014 12:06, Jean-Pierre Adam a écrit : Hello hwloc experts I encounter this bug when I'm using mpirun or hwloc directly : **************************************************************************** * hwloc has encountered what looks like an error from the operating system. * * L3 (cpuset 0x000003f0) intersects with NUMANode (P#0 cpuset 0x0000003f) without inclusion! * Error occurred in topology.c line 940 * * Please report this error message to the hwloc user's mailing list, * along with the output from the hwloc-gather-topology script. **************************************************************************** The output of hwloc-gather-topology is attached. The OS is Centos 7. The tool launched with mpirun runs as expected, still the message is a bit worrying... I was able to avoid this message by enabling "node interleaving" in the bios (basically disables NUMA). In my case, I got a 5% performance loss with that setting. It could be acceptable, but I would like to understant what is going on. So is my motherboard / BIOS / OS buggy ? Best regards _______________________________________________ hwloc-users mailing list hwloc-us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users Link to this post: http://www.open-mpi.org/community/lists/hwloc-users/2014/09/1070.php _______________________________________________ hwloc-users mailing list hwloc-us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users Link to this post: http://www.open-mpi.org/community/lists/hwloc-users/2014/09/1072.php