InfiniBand interface trafic monitor, tested on DGX/HGX A100/H100/A800/H800 , DGXOS/CentOS/Ubuntu

c++ 11

1. clone this repo
2. compile with g++ -std=c++11 ib_monitor.cpp -o ib_monitor -lpthread
3. run ./ib_monitor

port_xmit_data: (RO) Total number of data octets, divided by 4 (lanes), transmitted on all VLs. This is 64 bit counter port_rcv_data: (RO) Total number of data octets, divided by 4 (lanes), received on all VLs. This is 64 bit counter. From: Documentation/ABI/stable/sysfs-class-infiniband

pma_cnt_ext->port_xmit_data =
    cpu_to_be64(MLX5_SUM_CNT(out, transmitted_ib_unicast.octets,
                 transmitted_ib_multicast.octets) >> 2);
pma_cnt_ext->port_rcv_data =
    cpu_to_be64(MLX5_SUM_CNT(out, received_ib_unicast.octets,
                 received_ib_multicast.octets) >> 2);

file: drivers/infiniband/hw/mlx5/mad.c