Flags GPUs that reach one or more peers only via a SYS-class PCIe hop
(crossing the CPU/NUMA-node boundary) in nvidia-smi topo -m. On servers
where GPUs are only bridged pairwise via NVLink bridge (no switched
NVLink fabric), this is the exact path that traffic between different
bridge pairs has to cross, and can cut multi-GPU throughput by 2x+ for
workloads spanning more than one pair.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
- storage: add jsonInt64 dual-format unmarshaler to handle lsblk output
change in util-linux 2.38 (LOG-SEC/PHY-SEC now emitted as JSON
integers, not quoted strings); fixes SATA disks invisible on Debian 12
- pcie: detect NVLink bridge mezzanine CX-7 cards (Mellanox x2, no host
net ifaces, DeviceName contains "NVLINK" in lspci -v) and mark them
with device_class="NVLinkBridge"; escalate PCIe link speed downgrade to
Critical for these cards (Gen3 on a fixed internal connector = hardware
fault, not a transient warning)
- pcie: cross-reference nvidia-smi topo to capture NVLink bond counts and
active status for all NVLink bridge cards
- packages: add infiniband-diags to ISO; provides ibstat required by
nvidia-fabricmanager-start.sh to enumerate IB devices before FM launch
(absence causes CUDA_ERROR_SYSTEM_NOT_READY)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Mikhail Chusavitin
mchus