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Edited for grammar, formatting, and text flow.
Modified topic title, heading text, and heading levels. Deleted prompt character. Replaced # with sudo. Corrected links to external webpages. Edited text for active voice and consistency between steps. Signed-off-by: MCamp859 <mary.camp@ptiglobal.net>
This commit is contained in:
MCamp859
@@ -1,337 +1,347 @@
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.. _dpdk:
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Send packages between platforms
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###############################
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Use DPDK to send packets between platforms
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##########################################
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:abbr:`Data Plane Development Kit (DPDK)` is a set of libraries and drivers
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for fast packet processing. This document describes how to run a basic use
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case for **l3fwd DPDK example**. The objective is to *send packages between
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two platforms* using a traffic generator called :ref:`pktgen <sec_pktgen>`,
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where the l3fwd example application will forward those packages, see
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:ref:`figure 1 <f1>`.
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This document describes how to send packets between two platforms in the
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simple configuration shown in :ref:`Figure 1 <f1>`. The example uses the
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:abbr:`Data Plane Development Kit (DPDK)`, which is a set of libraries,
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drivers, sample applications, and tools for fast packet processing.
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.. _f1:
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.. figure:: ./figures/pktgen_lw3fd.png
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:align: center
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:alt: platform A and B
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:alt: Platform A and B
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Figure 1: Environment for l3fwd DPDK application.
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Figure 1: Environment for l3fwd DPDK application
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This example uses the following DPDK components:
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**Requirements:**
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* pktgen: Traffic generator. See `pktgen documentation`_ for details.
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* l3fwd: Layer 3 forwarding example application. See
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`l3fwd documentation`_ for details.
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* Two platforms using Clear Linux* for Intel® Architecture (recommended
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release `13330`_ or higher).
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* Both images have the **kernel-native bundle** added.
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* Install of **network-basic-dev** bundle:
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Prerequisites
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*************
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.. code-block:: bash
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* Two platforms using |CLOSIA| release `13330`_ or higher.
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* Both images must include the :file:`kernel-native bundle`.
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* Install the :file:`network-basic-dev` bundle with the command:
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# swupd bundle-add network-basic-dev
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.. code-block:: bash
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sudo swupd bundle-add network-basic-dev
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* Each platform must have at least one :abbr:`NIC (Network Interface Card)`.
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Check the `DPDK project`_ for the list of supported `dpdk.org NICs`_.
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* The platforms must have two NICs, at least one each. It's very important to
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check network card compatibility with the `DPDK project`_. You can do this
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on the `dpdk.org NICS`_ site.
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* Two network cables.
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Installing dpdk and build l3fwd example (Platform B)
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====================================================
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Install dpdk and build l3fwd example (Platform B)
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*************************************************
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#. Move to ``l3fwd`` example.
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#. Change to the :file:`l3fwd` example directory.
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.. code-block:: bash
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# cd /usr/share/dpdk/examples/l3fwd
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sudo cd /usr/share/dpdk/examples/l3fwd
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#. Assign ``RTE_SDK var`` to the makefiles path.
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#. Assign :envvar:`RTE_SDK` variable to the makefiles path.
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.. code-block:: bash
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# export RTE_SDK=/usr/share/dpdk/
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sudo export RTE_SDK=/usr/share/dpdk/
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#. Assign ``RTE_TARGET var`` the value where the gcc config file is located.
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#. Assign :envvar:`RTE_TARGET` variable to the location of the gcc\* config
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file.
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.. code-block:: bash
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# export RTE_TARGET=x86_64-native-linuxapp-gcc
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sudo export RTE_TARGET=x86_64-native-linuxapp-gcc
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#. Build the ``l3fwd`` application, then add the configuration header to
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the ``CFLAGS`` var.
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#. Build the `l3fwd` application and add the configuration header to
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the :makevar:`CFLAGS` variable.
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.. code-block:: bash
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# make CFLAGS+="-include /usr/include/rte_config.h"
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sudo make CFLAGS+="-include /usr/include/rte_config.h"
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Build pktgen (Platform A)
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*************************
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.. _sec_pktgen:
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Building Pktgen (Platform A)
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============================
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Since the **pktgen** project is currently not included in Clear Linux OS for
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Intel Architecture, you must download it from upstream and build it:
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#. Download the `pktgen tar package`_ 3.1.2 or newer.
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#. Download the `pktgen tar package`_ v3.1.2 or newer.
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#. Decompress packages and move to uncompressed source directory.
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#. Assign ``RTE_SDK var`` the path where makefiles are located.
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#. Assign :envvar:`RTE_SDK` variable to the path where makefiles are located.
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.. code-block:: bash
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# export RTE_SDK=/usr/share/dpdk/
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sudo export RTE_SDK=/usr/share/dpdk/
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#. Assign ``RTE_TARGET var`` the value where the gcc config file is located.
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#. Assign :envvar:`RTE_TARGET` to the location of the gcc config file.
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.. code-block:: bash
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# export RTE_TARGET=x86_64-native-linuxapp-gcc
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sudo export RTE_TARGET=x86_64-native-linuxapp-gcc
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#. Build pktgen project, and set the ``CONFIG_RTE_BUILD_SHARED_LIB`` variable
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with "n".
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#. Build the `pktgen` project and set the :makevar:`CONFIG_RTE_BUILD_SHARED_LIB` variable
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to "n".
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.. code-block:: bash
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# make CONFIG_RTE_BUILD_SHARED_LIB=n
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sudo make CONFIG_RTE_BUILD_SHARED_LIB=n
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Binding NICs to DPDK kernel drivers (Platforms A and B)
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=======================================================
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Bind NICs to DPDK kernel drivers (Platforms A and B)
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****************************************************
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The ``l3fwd`` application uses two NICs. DPDK has useful tools for binding
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The `l3fwd` application uses two NICs. The DPDK includes tools for binding
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NICs to DPDK modules to run DPDK applications.
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#. Load the dpdk I/O kernel module
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#. Load the DPDK I/O kernel module.
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.. code-block:: bash
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# modprobe vfio-pci
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sudo modprobe vfio-pci
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#. Check the status of your NICs; this will show which network cards are not
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busy. When another application is using them, the status shows ``Active``,
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#. Check the NIC status to determine which network cards are not
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busy. When another application is using them, the status shows `Active`,
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and those NICs cannot be bound.
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.. code-block:: bash
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# dpdk-devbind --status
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sudo dpdk-devbind --status
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#. Bind two available NICs. The general syntax for binding is
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**dpdk-devbind --bind=vfio-pci <device-entry>**,
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and the following is a working example:
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#. Bind two available NICs. The general syntax for binding is:
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:command:`dpdk-devbind --bind=vfio-pci <device-entry>`.
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A working example is shown below:
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.. code-block:: bash
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# dpdk-devbind --bind=vfio-pci 01:00.0
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sudo dpdk-devbind --bind=vfio-pci 01:00.0
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#. Check that your NICs binded correctly by checking the status; ``drv`` should
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have ``igb_uio`` value; at this point, the NICs are using the DPDK modules.
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#. Check the NIC status to verify that the NICs are bound correctly. If
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successful, `drv` displays the value `igb_uio`, which confirms
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that the NICs are using the DPDK modules.
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Setting hugepages (platforms A and B)
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=====================================
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Set hugepages (Platforms A and B)
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*********************************
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Clear Linux OS for Intel Architecture supports ``hugepages`` for the large
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memory pool allocation used for packet buffers.
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|CLOSIA| supports `hugepages` for the large memory pool allocation used for
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packet buffers.
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#. Set number of hugepages.
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#. Set the number of hugepages.
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.. code-block:: bash
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# echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
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sudo echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
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#. Allocate pages on NUMA machines.
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.. code-block:: bash
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# echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
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# echo 1024 > /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages
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sudo echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
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sudo echo 1024 > /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages
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#. Make memory available for DPDK.
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.. code-block:: bash
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# mkdir -p /mnt/huge $ mount -t hugetlbfs nodev /mnt/huge
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sudo mkdir -p /mnt/huge $ mount -t hugetlbfs nodev /mnt/huge
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If you would like to know more about this, refer to the `DPDK guide`_.
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For more information, refer to the `DPDK guide`_ System Requirements
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section.
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Setting a physical environment (Platforms A and B)
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==================================================
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Set up the physical environment (Platforms A and B)
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***************************************************
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To achieve the model proposed in the introduction of this topic, (:ref:`f1`),
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we need to connect the first Grantley’s NICs to the second Grantley’s NICs
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using the network cables, see :ref:`figure 2<f2>`.
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Connect the NICs on Platform A to the NICs on Platform B using the network
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cables as shown in :ref:`Figure 2<f2>`.
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.. _f2:
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.. figure:: ./figures/pyshical_net.png
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Figure 2: Physical network environment.
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Figure 2: Physical network environment
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Running l3fwd application (Platform B)
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======================================
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Run l3fwd application (Platform B)
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**********************************
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The ``l3fwd`` application is one of the DPDK examples available when you
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install the ``dpdk-dev`` bundle; this application forwards packages from one
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NIC to another.
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The `l3fwd` application is one of the DPDK examples available when you
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install the :file:`dpdk-dev` bundle. `l3fwd` forwards packets from one
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NIC to another. For details, refer to the `l3fwd documentation`_.
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#. Open the l3fwd example directory.
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.. code-block:: bash
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# cd /usr/share/dpdk/examples/l3fwd
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sudo cd /usr/share/dpdk/examples/l3fwd
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#. **This step is very important.** DPDK needs poll drivers for work; these
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poll drivers are shared objects in :file:`/usr/lib64`. DPDK supports some
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NICs. The full list available at the `dpdk.org NICS`_ docs. You should know
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||||
which kernel module the NIC is using and choose a poll driver according to
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||||
your NICs.
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#. **This step is very important.**
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||||
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#. At this point the system must have ``hugepages`` requirements. The NICs
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bound and the configuration for running ``pktgen`` depends upon network use
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cases and available system resources. Use the ``-d`` flag for setting the
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pull driver. For example, if the NICs are using ``e1000`` network driver,
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they are going to use ``e1000`` poll driver (``librte_pmd_e1000.so``); it
|
||||
should be in :file:`/usr/lib64` in Clear Linux OS for Intel Architecture,
|
||||
and it should be enough to add the name. For example
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||||
#. DPDK needs poll mode drivers to operate.
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#. Poll mode drivers are shared objects in :file:`/usr/lib64`.
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||||
#. See the full list of supported NICs at `dpdk.org NICs`_.
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||||
#. You must know which kernel module each NIC is using and choose a poll
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||||
mode driver that corresponds to your NICs.
|
||||
|
||||
#. NIC binding and `pktgen` configuration depends upon network use cases and
|
||||
available system resources. Use the :command:`-d` flag to set the poll mode
|
||||
driver.
|
||||
|
||||
The following example assumes that the NICs use the `e1000` network driver
|
||||
and the `e1000` poll mode driver. The :file:`librte_pmd_e1000.so` is
|
||||
located in :file:`/usr/lib64` in |CL|.
|
||||
|
||||
.. code-block:: bash
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||||
|
||||
# ./build/l3fwd -c 0x3 -n 2 -d librte_pmd_e1000.so -- -p 0x3 --config="(0,0,0),(1,0,1)"
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||||
sudo ./build/l3fwd -c 0x3 -n 2 -d librte_pmd_e1000.so -- -p 0x3 --config="(0,0,0),(1,0,1)"
|
||||
|
||||
#. When the application starts to run, it will show information about the
|
||||
``l3fwd`` running, so pay attention when the application is Initializing
|
||||
ports. After port 0 initialization, you'll see a MAC address and the same
|
||||
for port 1. Save this information for setting configuration to `Pktgen`
|
||||
project.
|
||||
#. The `l3fwd` application shows port initialization details at startup.
|
||||
After port 0 initialization completes, `l3fwd` shows a MAC address and
|
||||
information for port 1.
|
||||
|
||||
Running Pktgen application (Platform A)
|
||||
===========================================
|
||||
Save the MAC address for configuring the `pktgen` project.
|
||||
|
||||
The `Pktgen` is network traffic generator. It measures the network packaging
|
||||
performance in a forwarding use case.
|
||||
Run pktgen application (Platform A)
|
||||
***********************************
|
||||
|
||||
#. At this point the system must have ``hugepages`` requirements and the NICs
|
||||
bound. The configuration for running ``pktgen`` depends upon the network use
|
||||
case and the available system resources. The following is a basic
|
||||
`pktgen` is a network traffic generator included in the DPDK.
|
||||
|
||||
#. `pktgen` configuration depends upon the network setup and the
|
||||
available system resources. The following example shows a basic
|
||||
configuration.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# ./app/app/x86_64-native-linuxapp-gcc/pktgen -c 0xf -n 4 -- -p 0xf -P -m "1.0, 2.1"
|
||||
sudo ./app/app/x86_64-native-linuxapp-gcc/pktgen -c 0xf -n 4 -- -p 0xf -P -m "1.0, 2.1"
|
||||
|
||||
#. Enable active colorful output (optional).
|
||||
|
||||
.. code-block:: console
|
||||
.. code-block:: bash
|
||||
|
||||
Pktgen> theme enable
|
||||
|
||||
#. The ``l3fwd`` application showed a MAC address per-port initialized; this
|
||||
MAC addresses should have been set in the pktgen environment::
|
||||
#. Use the MAC addresses shown by the `l3fwd` application during initialization.
|
||||
The command to set the MAC addresses in `pktgen` has the format:
|
||||
|
||||
> set mac <port number> <mac address>
|
||||
.. code-block:: bash
|
||||
|
||||
And a working example:
|
||||
set mac <port number> <mac address>
|
||||
|
||||
.. code-block:: console
|
||||
Here is a working example:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
Pktgen> set mac 0 00:1E:67:CB:E8:C9
|
||||
Pktgen> set mac 1 00:1E:67:CB:E8:C9
|
||||
|
||||
#. Start to send packages using the next command:
|
||||
#. Send packets.
|
||||
|
||||
.. code-block:: console
|
||||
.. code-block:: bash
|
||||
|
||||
Pktgen> start 0-1
|
||||
|
||||
#. If you followed these steps correctly, you'll see that ``pktgen`` is sending
|
||||
and receiving packages. For more information, see the `Pktgen
|
||||
documentation`_.
|
||||
For more details, see the `pktgen documentation`_.
|
||||
|
||||
|
||||
Annex A: Using pass-through for running on virtual machines
|
||||
===========================================================
|
||||
Appendix A: Use pass-through for virtual machines
|
||||
*************************************************
|
||||
|
||||
This section explains how to set up a virtual environment where virtual
|
||||
machines control the host's NICs.
|
||||
machines control the NICs on the host.
|
||||
|
||||
#. Create a new directory and move to it.
|
||||
|
||||
#. Download or create a ``start_qemu.sh`` script for running a kvm virtual
|
||||
#. Download or create a :file:`start_qemu.sh` script for running a kvm virtual
|
||||
machine:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
$ curl -O https://download.clearlinux.org/image/start_qemu.sh
|
||||
sudo curl -O https://download.clearlinux.org/image/start_qemu.sh
|
||||
|
||||
#. Download a bare-metal image of Clear Linux OS for Intel Architecture and
|
||||
rename it as ``clear.img``.
|
||||
#. Download a bare-metal image of |CLOSIA| and rename it as :file:`clear.img`.
|
||||
|
||||
#. Look for an entry for device and vendor & device ID:
|
||||
#. Look for an Ethernet\* device entry that contains vendor and device ID:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
$ lspci -nn | grep Ethernet
|
||||
sudo lspci -nn | grep Ethernet
|
||||
|
||||
An output example from the last step::
|
||||
An example output:
|
||||
|
||||
.. code-block:: console
|
||||
|
||||
03:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521]
|
||||
|
||||
where ``8086:1521`` is ``vendor:device ID`` and ``03:00.0`` is the entry for
|
||||
device. Make note of this information; it is necessary for unbinding a
|
||||
host's NICs.
|
||||
where `03:00.0` is the device entry and `8086:1521` is the `vendor:device
|
||||
ID`. Record this information, because you need it to unbind the NICs from a
|
||||
host.
|
||||
|
||||
#. Unbind NICs from host to do passthrough with virtual machines. Clear Linux
|
||||
OS for Intel Architecture currently supports this action. You can use the
|
||||
following commands::
|
||||
|
||||
#. Unbind the NICs from the host to do pass-through with virtual machines. |CLOSIA|
|
||||
supports this action. The commands take the format:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
echo "vendor device_ID" > /sys/bus/pci/drivers/pci-stub/new_id
|
||||
echo "entry for device" > /sys/bus/pci/drivers/igb/unbind
|
||||
echo "entry for device" > /sys/bus/pci/drivers/pci-stub/bind
|
||||
echo "vendor device_ID" > /sys/bus/pci/drivers/pci-stub/remove_id
|
||||
|
||||
Here is a working example:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
$ echo "8086 1521" > /sys/bus/pci/drivers/pci-stub/new_id
|
||||
$ echo "0000:03:00.0" > /sys/bus/pci/drivers/igb/unbind
|
||||
$ echo "0000:03:00.0" > /sys/bus/pci/drivers/pci-stub/bind
|
||||
$ echo "8086 1521" > /sys/bus/pci/drivers/pci-stub/remove_id
|
||||
sudo echo "8086 1521" > /sys/bus/pci/drivers/pci-stub/new_id
|
||||
sudo echo "0000:03:00.0" > /sys/bus/pci/drivers/igb/unbind
|
||||
sudo echo "0000:03:00.0" > /sys/bus/pci/drivers/pci-stub/bind
|
||||
sudo echo "8086 1521" > /sys/bus/pci/drivers/pci-stub/remove_id
|
||||
|
||||
#. Assign to the KVM virtual machine (guest) the unbound NICs previously noted.
|
||||
Modify the ``start_qemu.sh`` script in ``qemu-system-x86_64`` arguments, and
|
||||
add the lines with the host's NICs information::
|
||||
#. Assign the unbound NICs to the KVM virtual machine (guest).
|
||||
Modify the :file:`start_qemu.sh` script in `qemu-system-x86_64` arguments, and
|
||||
add the lines with the host's NICs information in the format:
|
||||
|
||||
-device pci-assign,host="<entry for device>",id=passnic0,addr=03.0
|
||||
-device pci-assign,host="<entry for device>",id=passnic1,addr=04.0
|
||||
.. code-block:: bash
|
||||
|
||||
A working example:
|
||||
-device pci-assign,host="<entry for device>",id=passnic0,addr=03.0
|
||||
-device pci-assign,host="<entry for device>",id=passnic1,addr=04.0
|
||||
|
||||
Here is a working example:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
-device pci-assign,host=03:00.0,id=passnic0,addr=03.0 \
|
||||
-device pci-assign,host=03:00.3,id=passnic1,addr=04.0 \
|
||||
|
||||
#. If you would like to add more NUMA machines to the virtual machine, you can
|
||||
add the next line in the Makefile boot target::
|
||||
#. Add more NUMA machines to the virtual machine by adding lines to the
|
||||
Makefile boot target in the format:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
-numa node,mem=<memory>,cpus=<number of cpus>
|
||||
|
||||
As a working example for a virtual machine with 4096 of memory and four CPUs, the configuration
|
||||
would look like this::
|
||||
Here is a working example for a virtual machine with 4096 memory and four
|
||||
CPUs:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
-numa node,mem=2048,cpus=0-1 \
|
||||
-numa node,mem=2048,cpus=2-3 \
|
||||
|
||||
This means that each NUMA machine has to use the same quantity of memory.
|
||||
.. note:: Each NUMA machine must use the same quantity of memory.
|
||||
|
||||
#. Finally, run the ``start_qemu.sh`` script.
|
||||
#. Run the :file:`start_qemu.sh` script.
|
||||
|
||||
|
||||
.. _13330: https://download.clearlinux.org/releases/13330/
|
||||
.. _DPDK project: http://dpdk.org
|
||||
.. _dpdk.org NICS: http://dpdk.org/doc/nics
|
||||
.. _dpdk.org NICs: http://dpdk.org/doc/nics
|
||||
.. _pktgen tar package: http://dpdk.org/browse/apps/pktgen-dpdk/refs
|
||||
.. _DPDK guide: http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html
|
||||
.. _Pktgen documentation: `Pktgen documentation`_ https://media.readthedocs.org/pdf/pktgen/latest/pktgen.pdf
|
||||
.. _l3fwd documentation: http://dpdk.org/doc/guides/sample_app_ug/l3_forward.html
|
||||
.. _pktgen documentation: http://pktgen-dpdk.readthedocs.io/en/latest/index.html
|
||||
|
||||
Reference in New Issue
Block a user