2. SW Turbo Poll Mode Driver
The SW Turbo PMD (baseband_turbo_sw) provides a poll mode bbdev driver that utilizes Intel optimized libraries for LTE Layer 1 workloads acceleration. This PMD supports the functions: Turbo FEC, Rate Matching and CRC functions.
SW Turbo PMD has support for the following capabilities:
For the encode operation:
For the decode operation:
- In-place operations for Turbo encode and decode are not supported
2.3.1. FlexRAN SDK Download
To build DPDK with the baseband_turbo_sw PMD the user is required to download
the export controlled
FlexRAN SDK Libraries. An account at Intel Resource
needs to be registered.
Once registered, the user needs to log in, and look for Intel FlexRAN Software Release Package -1-6-0 to download or directly through this link.
After download is complete, the user needs to unpack and compile on their system before building DPDK.
The following table maps DPDK versions with past FlexRAN SDK releases:
|DPDK version||FlexRAN SDK release|
2.3.2. FlexRAN SDK Installation
- The following are pre-requisites for building FlexRAN SDK Libraries:
- An AVX2 supporting machine
- CentOS Linux release 7.2.1511 (Core) operating system
- Intel ICC 18.0.1 20171018 compiler installed
The following instructions should be followed in this exact order:
Set the environment variables:
source <path-to-icc-compiler-install-folder>/linux/bin/compilervars.sh intel64 -platform linux
unzip flexran-1-6-0-tar.gz.zip tar xvzf flexran-1-6-0-tar.gz -C FlexRAN-1.6.0/
Run the SDK extractor script and accept the license:
cd <path-to-workspace>/FlexRAN-1.6.0/ ./SDK-R1.6.0.sh
Generate makefiles based on system configuration:
cd <path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/ ./create-makefiles-linux.sh
A build folder is generated in this form
build-<ISA>-<CC>, enter that folder and install:
cd build-avx2-icc/ make && make install
In order to enable this virtual bbdev PMD, the user must:
- Build the
FLEXRAN SDKlibraries (explained in Installation section).
- Export the environmental variables
FLEXRAN_SDKto the path where the FlexRAN SDK libraries were installed. And
DIR_WIRELESS_SDKto the path where the libraries were extracted.
export FLEXRAN_SDK=<path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/build-avx2-icc/install export DIR_WIRELESS_SDK=<path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/
CONFIG_RTE_LIBRTE_PMD_BBDEV_TURBO_SW=yin DPDK common configuration file
To use the PMD in an application, user must:
rte_vdev_init("baseband_turbo_sw")within the application.
--vdev="baseband_turbo_sw"in the EAL options, which will call
The following parameters (all optional) can be provided in the previous two calls:
socket_id: Specify the socket where the memory for the device is going to be allocated (by default, socket_id will be the socket where the core that is creating the PMD is running on).
max_nb_queues: Specify the maximum number of queues in the device (default is
./test-bbdev.py -e="--vdev=baseband_turbo_sw,socket_id=0,max_nb_queues=8" \ -c validation -v ./turbo_*_default.data