Re: [OMPI users] hwloc: Topology became empty, aborting!

[Brice Goglin via users]

Hello




Try building with --enable-debug to get a lot of debug messages in lstopo.



Or better, put all this in https://github.com/open-mpi/hwloc/issues/new

Brice



Le 01/08/2023 à 16:17, Max R. Dechantsreiter via users a écrit :

This is a hwloc issue, the mailing list is hwloc-us...@lists.open-mpi.org (please update the CCed address if you reply to this message). Or run "hwloc-gather-topology foo" and send the resulting foo.tar.gz (you will likely get some error messages but you may ignore them).

On a VPS I tested my build of hwloc-2.9.2 by running lstopo:

./lstopo
hwloc: Topology became empty, aborting!
Segmentation fault

On a GCP n1-standard-2 a similar build (GCC 12.2 vs. 13.2) seemed to work:

./lstopo
hwloc/nvml: Failed to initialize with nvmlInit(): Driver Not Loaded
Machine (7430MB total)
   Package L#0
     NUMANode L#0 (P#0 7430MB)
     L3 L#0 (45MB) + L2 L#0 (256KB) + L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0
       PU L#0 (P#0)
       PU L#1 (P#1)
   HostBridge
     PCI 00:03.0 (Other)
       Block(Disk) "sda"
     PCI 00:04.0 (Ethernet)
       Net "ens4"
     PCI 00:05.0 (Other)

What steps should I take to find the cause of the failure on the VPS?
I suspect an OS issue because in the past my builds of OpenMPI worked.

OpenPGP_signature
Description: OpenPGP digital signature