gnuradio-dpdk

UDP RX implementation for IQ samples using DPDK

Features

• accepts UDP packets with legacy CHDR header (64 bits) and IQ samples in LE format
• outputs complex stream
• core 0 and 1 for rx threads and dpdk device id 0 are currently hardcoded

For details of legacy CHDR see https://files.ettus.com/manual/page_rtp.html

Requirements

• pkg-config (tested with Ubuntu 21.04)
• dpdk (tested with 21.11)
• gnuradio >= 3.8
• cmake
• cisco trex for testing

Installation

cd gr-dpdk
mkdir build
cd build
cmake ../

Specify the python site-package path if multiple python installations are available:

cmake ../ -DGR_PYTHON_DIR=/usr/local/lib/python3.9/dist-packages

make
make install

Test

• setup DPDK and bind interface
• wire up a dpdk_source (port 12) to a QT GUI time sink (autoscale enabled)

• run the generated script as root
• start the trex data generator (see https://trex-tgn.cisco.com/trex/doc/trex_stateless.html#_getting_started_tutorials for details)

sudo ./t-rex-64 -i

in a different terminal:

./trex-console
start -f chdr_generator.py -m 1000mbps

Todo

• C++ unit tests
• check seqnum of CHDR and track packet error rate
• general rx statistics
• add possibility to set DPDK EAL parameters, used lcored and dpdk device
• add support for jumbo frames
• add more packet formats and output types
• add TX (sink)