How can I query the NVLink-C2C characteristics using nvidia-smi on a GH200? Where is this exposed to the user?
On a x86+H100, I am able to do this with the following which shows the PCIe Gen5 interface between the CPU and GPU:
nvidia-smi --query-gpu=pci.bus_id --format=csv,noheader
00000000:DD:00.0
LnkCap: Port #0, Speed 32GT/s, Width x16, ASPM L1, Exit Latency L1 <4us
LnkSta: Speed 32GT/s, Width x16
LnkCap2: Supported Link Speeds: 2.5-32GT/s