On Monday, July 05, 2010 07:12:58 am Brice Goglin wrote: > Le 05/07/2010 02:41, Jirka Hladky a écrit : > > Hi all, > > > > I'm using hwloc-distrib quite often to distribute jobs optimally on NUMA > > boxes. I use it to test linux kernel task - scheduler by comparing > > runtime of jobs bound to best possible CPU configuration (keeping CPU > > cache in mind) with runs without CPU affinity set. > > > > I just run into strange issue on box with newest Intel's Nehalem CPUs. > > There are 4 Sockets, each with 8 physical cores and hyper-threading > > enabled, which gives you 64 OS processors. > > > > The box has strange NUMA layout - I will need to check why it is so. > > Basically, there are 3 NUMA nodes - one includes 2 Sockets, other 2 have > > one Socket associated to each of it. > > Seems strange to me, likely a BIOS bug. Nehalem-EX should always have > one NUMA node per socket from what I understand.
Confirmed to be BIOS bug. Asked Intel to get fixed BIOS. Thanks! Jirka
