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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2017 Cavium, Inc
.. _pmd_build_and_test:
Compiling and testing a PMD for a NIC
=====================================
This section demonstrates how to compile and run a Poll Mode Driver (PMD) for
the available Network Interface Cards in DPDK using TestPMD.
TestPMD is one of the reference applications distributed with the DPDK. Its main
purpose is to forward packets between Ethernet ports on a network interface and
as such is the best way to test a PMD.
Refer to the :ref:`testpmd application user guide <testpmd_ug>` for detailed
information on how to build and run testpmd.
Driver Compilation
------------------
To compile a PMD for a platform, run make with appropriate target as shown below.
Use "make" command in Linux and "gmake" in FreeBSD. This will also build testpmd.
To check available targets:
.. code-block:: console
cd <DPDK-source-directory>
make showconfigs
Example output:
.. code-block:: console
arm-armv7a-linux-gcc
arm64-armv8a-linux-gcc
arm64-dpaa-linux-gcc
arm64-thunderx-linux-gcc
arm64-xgene1-linux-gcc
i686-native-linux-gcc
i686-native-linux-icc
ppc_64-power8-linux-gcc
x86_64-native-freebsd-clang
x86_64-native-freebsd-gcc
x86_64-native-linux-clang
x86_64-native-linux-gcc
x86_64-native-linux-icc
x86_x32-native-linux-gcc
To compile a PMD for Linux x86_64 gcc target, run the following "make" command:
.. code-block:: console
make install T=x86_64-native-linux-gcc
Use ARM (ThunderX, DPAA, X-Gene) or PowerPC target for respective platform.
For more information, refer to the :ref:`Getting Started Guide for Linux <linux_gsg>`
or :ref:`Getting Started Guide for FreeBSD <freebsd_gsg>` depending on your platform.
Running testpmd in Linux
------------------------
This section demonstrates how to setup and run ``testpmd`` in Linux.
#. Mount huge pages:
.. code-block:: console
mkdir /mnt/huge
mount -t hugetlbfs nodev /mnt/huge
#. Request huge pages:
Hugepage memory should be reserved as per application requirement. Check
hugepage size configured in the system and calculate the number of pages
required.
To reserve 1024 pages of 2MB:
.. code-block:: console
echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
.. note::
Check ``/proc/meminfo`` to find system hugepage size:
.. code-block:: console
grep "Hugepagesize:" /proc/meminfo
Example output:
.. code-block:: console
Hugepagesize: 2048 kB
#. Load ``igb_uio`` or ``vfio-pci`` driver:
.. code-block:: console
modprobe uio
insmod ./x86_64-native-linux-gcc/kmod/igb_uio.ko
or
.. code-block:: console
modprobe vfio-pci
#. Setup VFIO permissions for regular users before binding to ``vfio-pci``:
.. code-block:: console
sudo chmod a+x /dev/vfio
sudo chmod 0666 /dev/vfio/*
#. Bind the adapters to ``igb_uio`` or ``vfio-pci`` loaded in the previous step:
.. code-block:: console
./usertools/dpdk-devbind.py --bind igb_uio DEVICE1 DEVICE2 ...
Or setup VFIO permissions for regular users and then bind to ``vfio-pci``:
.. code-block:: console
./usertools/dpdk-devbind.py --bind vfio-pci DEVICE1 DEVICE2 ...
.. note::
DEVICE1, DEVICE2 are specified via PCI "domain:bus:slot.func" syntax or
"bus:slot.func" syntax.
#. Start ``testpmd`` with basic parameters:
.. code-block:: console
./x86_64-native-linux-gcc/app/testpmd -l 0-3 -n 4 -- -i
Successful execution will show initialization messages from EAL, PMD and
testpmd application. A prompt will be displayed at the end for user commands
as interactive mode (``-i``) is on.
.. code-block:: console
testpmd>
Refer to the :ref:`testpmd runtime functions <testpmd_runtime>` for a list
of available commands.
.. note::
When ``testpmd`` is built with shared library, use option ``-d`` to load
the dynamic PMD for ``rte_eal_init``.
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