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Subject: [hwloc-devel] hwloc on power7
From: Jirka Hladky (jhladky_at_[hidden])
Date: 2010-08-04 18:19:41


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

root_at_[hidden]: /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)