Hello Liam
dmidecode is usually reserved to root only because it uses SMBIOS or
whatever hardware/ACPI/... tables. Those tables are read by the Linux
kernel and exported to non-root users in sysfs:
$ cat /sys/bus/pci/devices/:ae:0c.6/numa_node
1
However this file isn't that good because some old platforms had PCI
buses attached to 2 NUMA nodes (cannot be exposed in the above sysfs
"numa_node" file). So we rather read the list of local CPUs:
$ cat /sys/bus/pci/devices/:ae:0c.6/local_cpus
,,
$ cat /sys/bus/pci/devices/:ae:0c.6/local_cpulist
1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,69,73,77
Brice
Le 03/02/2020 à 17:46, Murphy, Liam a écrit :
>
> Newbie question.
>
>
>
> I know that dmidecode uses the num_node files under
> /sys/devices/pcie…, but hwloc does not seem
>
> to use the same mechanism to determine which PCI devices are on which
> numa node? From which
>
> file is it deriving the information?
>
>
>
> Regards,
>
> Liam
>
>
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