Am 17.03.2016 um 10:40 schrieb Ralph Castain: > Just some thoughts offhand: > > * what version of OMPI are you using?
dpkg -l openmpi-bin says 1.6.5-8 from Ubuntu 14.04. > > * are you saying that after the warm reboot, all 48 procs are running on a > subset of cores? Yes. After a cold boot all 48 processses are spread over all 48 cores and all cores show up as almost 100% in the htop cpu meter. After a warm boot, the 48 processes are just spread over a few cores and the rest of the system is idling. > * it sounds like some of the cores have been marked as “offline” for some > reason. Make sure you have hwloc installed on the machine, and run “lstopo” > and see if that is the case I tried with lstopo, but the graphics that I got look almost similar. The visible difference is in the sort of topology for the graphics adapter and the LAN cards. The path to the graphics shows 2 times the numbers 4,0 above the lines and the path to the eth0 shows 2 times the numbers 0,2 above the lines. lstopo for the warm boot looks identical, but those small numbers are missing now. I also tried with hwloc-gather-topology and diff'd the 2 results. There is nothing special to see. Differneces in /proc/stats/ and /proc/cpuinfo, but nothing special, just ohter values. Something is obviously wrong on a low level, but I'm still struggling to find it. :-/ Rainer -- Dipl.-Inf. (FH) Rainer Koenig Project Manager Linux Clients Dept. PDG WPS R&D SW OSE Fujitsu Technology Solutions Bürgermeister-Ullrich-Str. 100 86199 Augsburg Germany Telephone: +49-821-804-3321 Telefax: +49-821-804-2131 Mail: mailto:rainer.koe...@ts.fujitsu.com Internet ts.fujtsu.com Company Details ts.fujitsu.com/imprint.html
