I have a Ubuntu machine with BlueField2 DPU installed. When I run the command “sudo mst status -v” on the host, the result is as follows:
wenhaoy@gpu3:~/spdk$ sudo mst status -v
MST modules:
MST PCI module loaded
MST PCI configuration module loaded
PCI devices:
DEVICE_TYPE MST PCI RDMA NET NUMA
BlueField2(rev:1) /dev/mst/mt41686_pciconf0.1 84:00.1 mlx5_1 net-ens14f1np1 1
BlueField2(rev:1) /dev/mst/mt41686_pciconf0 84:00.0 mlx5_0 net-ens14f0np0 1
When I run the same command on the DPU, the result is as follows:
root@localhost:/home/ubuntu/spdk# sudo mst status -v
MST modules:
MST PCI module is not loaded
MST PCI configuration module loaded
PCI devices:
DEVICE_TYPE MST PCI RDMA NET NUMA
BlueField2(rev:1) /dev/mst/mt41686_pciconf0.1 03:00.1 mlx5_1 net-pf1hpf,net-en3f1pf1sf0,net-p1 -1
BlueField2(rev:1) /dev/mst/mt41686_pciconf0 03:00.0 mlx5_0 net-p0,net-pf0hpf,net-en3f0pf0sf0 -1
My question is, the DPU has only two Ethernet interfaces, but both the DPU and the host show four physical interfaces. What is the relationship between mlx5_0 displayed on the DPU and mlx5_0 displayed on the host? Additionally, what is the relationship between p0, net-pf0hpf, and en3f0pf0sf0?