The Ethtool sample application shows an implementation of an ethtool-like API and provides a console environment that allows its use to query and change Ethernet card parameters. The sample is based upon a simple L2 frame reflector.
To compile the sample application see Compiling the Sample Applications.
The application is located in the ethtool sub-directory.
The application requires an available core for each port, plus one. The only available options are the standard ones for the EAL:
./ethtool-app/ethtool-app/${RTE_TARGET}/ethtool [EAL options]
Refer to the DPDK Getting Started Guide for general information on running applications and the Environment Abstraction Layer (EAL) options.
The application is console-driven using the cmdline DPDK interface:
EthApp>
From this interface the available commands and descriptions of what they do as follows:
The sample program has two parts: A background packet reflector that runs on a slave core, and a foreground Ethtool Shell that runs on the master core. These are described below.
The background packet reflector is intended to demonstrate basic packet processing on NIC ports controlled by the Ethtool shim. Each incoming MAC frame is rewritten so that it is returned to the sender, using the port in question’s own MAC address as the source address, and is then sent out on the same port.
The foreground part of the Ethtool sample is a console-based interface that accepts commands as described in using the application. Individual call-back functions handle the detail associated with each command, which make use of the functions defined in the Ethtool interface to the DPDK functions.
The Ethtool interface is built as a separate library, and implements the following functions: