DPU CLI

NVIDIA DOCA DPU CLI

This document provides quick access to a useful set of CLI commands and utilities on the NVIDIA® BlueField® DPU environment.

This guide provides a concise guide on useful commands for DOCA deployment and configuration. This tables in this guide provide two categories of commands:

  • General commands for Linux/networking environment
  • DOCA/DPU-specific commands
Note:

For more information about these commands, such as usage instructions, flag options, arguments and so on, use the -h option after the command or use the manual (e.g., man lspci).


Command Description
ifconfig

Used to configure kernel-resident network interfaces. It is used at boot time to set up interfaces as necessary. After that, it is usually only needed when debugging or when system tuning is needed.

If no arguments are given, ifconfig displays the status of the currently active interfaces. If a single interface argument is given, it displays the status of the given interface only. If a single -a argument is given, it displays the status of all interfaces, even those that are down. Otherwise, it configures an interface.

ethtool <devname>

Used to query and control network device driver and hardware settings, particularly for wired Ethernet devices.

<devname> is the name of the network device on which ethtool should operate.

Note:

This command shows the speed of the network card of the DPU.


lspci Displays information about PCIe buses in the system and devices connected to them. By default, it shows a brief list of devices.
tcpdump Dump traffic on a network. Usage: tcpdump -i <interface> where <interface> is any port interface (physical/SF rep/VF port rep).
ovs-vsctl Utility for querying and configuring ovs-vswitchd. The ovs-vsctl program supports the model of a bridge implemented by Open vSwitch in which a single bridge supports ports on multiple VLANs.
mount 10.0.0.10:/vol/myshare/ myshare/ Used for mounting a work directory on the DPU.
Note:

Must be used after creating a new directory named myshare under root (i.e., mkdir /myshare)

scp Secure copy (remote file copy program). Useful for copying files from BlueField to the host and vice versa.
iperf Used for server-client connection. Useful to check if the network connection achieves the speed of the network card on the DPU (line rate).

Command Description
ibdev2netdev Displays available mlnx interfaces
mst Used to start MST service, to stop it, and for other operations with NVIDIA devices like reset and enabling remote access
cat /etc/mlnx-release Displays the full BlueField OS (bfb) version
cat /etc/os-release Displays the details of the underlying OS installed on BlueField
ipmitool power cycle Power cycle
echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages DPDK setup. Allocates hugepages for DPDK environment abstraction layer (EAL).
mlxdevm tool The mlxdevm tool is found under /opt/mellanox/iproute2/sbin/. With this tool it is possible to create an SF and set its state to active, configure a HW address and set it to trusted, deploy the created SF and print info about it.
/opt/mellanox/iproute2/sbin/mlxdevm port add pci/<pci_address> flavour pcisf pfnum <correspondig_physical_function_number> sfnum <unique_sf_number> Creates an SF in the flavor of the given PF with the given unique SF number. Example:

/opt/mellanox/iproute2/sbin/mlxdevm port add pci/0000:03`:00.0 flavour pcisf pfnum 0 sfnum 4

/opt/mellanox/iproute2/sbin/mlxdevm port show Displays information about the available SFs
/opt/mellanox/iproute2/sbin/mlxdevm port function set pci/0000:03:00.0/<sf_index> hw_addr <HW_address> trust on state active Configures SF capabilities such as setting the HW address, making it "trusted", and setting its state to active. <sf_index> the SF. To obtain this index, you may run mlxdevm port show. Example:

/opt/mellanox/iproute2/sbin/mlxdevm port function set pci/0000:03:00.0/229377 hw_addr 02:25:f2:8d:a2:4c trust on state active

echo mlx5_core.sf.<next_serial> > /sys/bus/auxiliary/drivers/mlx5_core.sf_cfg/unbind

$ echo mlx5_core.sf. <next_serial> > /sys/bus/auxiliary/drivers/mlx5_core.sf/bind

These two commands deploy the created SF. The first command unbinds the SF from the default driver, while the second command binds the SF to the actual driver. The deployment phase should be done after the capabilities of the SF are configured. The SF is identified by <next_serial> which can be obtained by running the command below.
ls /sys/bus/auxiliary/devices/mlx5_core.sf.*

Displays additional information about the created SFs and their "next serial numbers".

For example, if mlx5_core.sf.2 exists in the output of the command, then running cat /sys/bus/auxiliary/devices/mlx5_core.sf.2/sfnum would output the sfnum that is related to mlx5_core.sf.2.

/opt/mellanox/iproute2/sbin/mlxdevm port function set pci/<pci_address>/<sf_index> state inactive

/opt/mellanox/iproute2/sbin/mlxdevm port del pci/<pci_address>/<sf_index>

These two commands must be executed to delete a given SF. First, users must set the state of the SF to inactive, and only then should it be deleted.

/opt/mellanox/iproute2/sbin/mlxdevm port help Displays additional information about operations that can be used on created SF ports
crictl pods Displays currently active K8S pods, and their IDs (it might take up to 20-30 seconds for the pod to start)
crictl ps Displays currently active containers and their IDs
crictl ps -a Displays all containers, including containers that recently finished their execution
crictl logs <container-id> Examines the logs of a given container
crictl exec -it <container-id> /bin/bash Attaches a shell to a running container
journalctl -u kubelet Examines the Kubelet logs. Useful when a pod/container fails to spawn.
crictl stopp <pod-id> Stops a running K8S pod
crictl stop <container-id> Stops a running container
crictl rmi <image-id> Removes a container image from the local K8S registry

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