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Subject: Re: [hwloc-users] Hwloc error.
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2012-05-30 11:22:41


Hello,

John Hanks, le Wed 30 May 2012 17:03:47 +0200, a écrit :
> * Hwloc has encountered what looks like an error from the operating system.
> *
> * object intersection without inclusion!
> * Error occurred in topology.c line 594

There is indeed something odd with what the Linux kernel reports:

os node 1 has cpuset 0x0003ffff
os node 2 has cpuset 0x00fc0000

as can be seen in /sys/devices/system/node/node*/cpumap, but

os socket 0 has cpuset 0x00000fff
os socket 1 has cpuset 0x00fff000

as can be seen in /sys/devices/system/cpu/cpu*/topology/physical_package_id

i.e. the kernel reports that socket 0 is completely in node 1, while
socket 1 is half in node 1 and half in node 2. Do you have more
information about what the machine actually contains socket- and
NUMA-wise? The dell website is not really felpful, it talks about 4-16
cores for the DL165 G7, while you have 24.

Samuel