OS: Ubuntu18
Hardware: 2 x GeForce RTX 2080 Ti + NvLink
I can run p2pBandwidthLatencyTest successfully. And nvidia-smi nvlink -s get output:
GPU 0: GeForce RTX 2080 Ti (UUID: GPU-d9eec92f-21e4-f774-97c9-47a368135f54)
Link 0: 25.781 GB/s
Link 1: 25.781 GB/s
GPU 1: GeForce RTX 2080 Ti (UUID: GPU-9bb540fc-da5f-f577-4867-8cf2a33cb657)
Link 0: 25.781 GB/s
Link 1: 25.781 GB/s
But when I want to monitor throughput between GPU cards in nvlink, with command nvidia-smi nvlink -gt 0 -i 0. It got failed message:
GPU 0: GeForce RTX 2080 Ti (UUID: GPU-d9eec92f-21e4-f774-97c9-47a368135f54)
Failed to get throughput counters
Is there something wrong in my steps?