Hello, On my 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) (from which I conclude my build procedure is correct). At the suggestion of Brice Goglin (in response to my post of the same issue to Open MPI Users), I rebuilt with '--enable-debug' and ran lstopo; then I also ran hwloc-gather-topology hwloc-gather-topology The resulting lstopo.tar.gz and hwloc-gather-topology.tar.gz are attached, as I was unable to recognize the underlying problem, although I believe it could be a system issue, for my builds of OpenMPI on the VPS used to work before a new OS image was installed. Max
lstopo.tar.gz
Description: application/gzip
hwloc-gather-topology.tar.bz2
Description: Binary data
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