Hi, I just got access to one POWER7 box. Both hwloc 1.0.2 and latest hwloc 1.1 seem to have problems to detect the sockets correctly.
It's IBM 8406-71Y server equipped with only one socket. On the chip there are 8 cores. lstopo seems to be wrong here, reporting 8 sockets. I'm not sure if this problem arose in linux kernel or it's bug in lstopo code. Does anybody else tried to run hwloc on POWER7? Thanks Jirka Kernel: 2.6.32-54.el6.ppc64 r...@ibm-js24-01.lab.bos.redhat.com: /tmp/hwloc-1.1a1r2387/utils $ ./lstopo Machine (7616MB) Socket #0 + L3 #0 (4096KB) + L2 #0 (256KB) + L1 #0 (32KB) + Core #0 PU #0 (phys=0) PU #1 (phys=1) PU #2 (phys=2) PU #3 (phys=3) Socket #1 + L3 #1 (4096KB) + L2 #1 (256KB) + L1 #1 (32KB) + Core #1 PU #4 (phys=4) PU #5 (phys=5) PU #6 (phys=6) PU #7 (phys=7) Socket #2 + L3 #2 (4096KB) + L2 #2 (256KB) + L1 #2 (32KB) + Core #2 PU #8 (phys=8) PU #9 (phys=9) PU #10 (phys=10) PU #11 (phys=11) Socket #3 + L3 #3 (4096KB) + L2 #3 (256KB) + L1 #3 (32KB) + Core #3 PU #12 (phys=12) PU #13 (phys=13) PU #14 (phys=14) PU #15 (phys=15) Socket #4 + L3 #4 (4096KB) + L2 #4 (256KB) + L1 #4 (32KB) + Core #4 PU #16 (phys=16) PU #17 (phys=17) PU #18 (phys=18) PU #19 (phys=19) Socket #5 + L3 #5 (4096KB) + L2 #5 (256KB) + L1 #5 (32KB) + Core #5 PU #20 (phys=20) PU #21 (phys=21) PU #22 (phys=22) PU #23 (phys=23) Socket #6 + L3 #6 (4096KB) + L2 #6 (256KB) + L1 #6 (32KB) + Core #6 PU #24 (phys=24) PU #25 (phys=25) PU #26 (phys=26) PU #27 (phys=27) Socket #7 + L3 #7 (4096KB) + L2 #7 (256KB) + L1 #7 (32KB) + Core #7 PU #28 (phys=28) PU #29 (phys=29) PU #30 (phys=30) PU #31 (phys=31)