ceph/src/spdk/dpdk/doc/guides/sample_app_ug/intro.rst

   1 ..  SPDX-License-Identifier: BSD-3-Clause
   2     Copyright(c) 2010-2017 Intel Corporation.
   3
   4 Introduction to the DPDK Sample Applications
   5 ============================================
   6
   7 The DPDK Sample Applications are small standalone applications which
   8 demonstrate various features of DPDK. They can be considered as a cookbook of
   9 DPDK features.  Users interested in getting started with DPDK can take the
  10 applications, try out the features, and then extend them to fit their needs.
  11
  12
  13 The DPDK Sample Applications
  14 ----------------------------
  15
  16 Table :numref:`table_sample_apps` shows a list of some of the main sample
  17 applications that are available in the examples directory of DPDK:
  18
  19  .. _table_sample_apps:
  20
  21  .. table:: **Some of the DPDK Sample applications**
  22
  23     +---------------------------------------+--------------------------------------+
  24     | Bonding                               | Netmap Compatibility                 |
  25     +---------------------------------------+--------------------------------------+
  26     | Command Line                          | Packet Ordering                      |
  27     +---------------------------------------+--------------------------------------+
  28     | Distributor                           | Performance Thread                   |
  29     +---------------------------------------+--------------------------------------+
  30     | Ethtool                               | Precision Time Protocol (PTP) Client |
  31     +---------------------------------------+--------------------------------------+
  32     | Exception Path                        | Quality of Service (QoS) Metering    |
  33     +---------------------------------------+--------------------------------------+
  34     | Hello World                           | QoS Scheduler                        |
  35     +---------------------------------------+--------------------------------------+
  36     | Internet Protocol (IP) Fragmentation  | Quota and Watermark                  |
  37     +---------------------------------------+--------------------------------------+
  38     | IP Pipeline                           | RX/TX Callbacks                      |
  39     +---------------------------------------+--------------------------------------+
  40     | IP Reassembly                         | Server node EFD                      |
  41     +---------------------------------------+--------------------------------------+
  42     | IPsec Security Gateway                | Basic Forwarding/Skeleton App        |
  43     +---------------------------------------+--------------------------------------+
  44     | IPv4 multicast                        | Tunnel End Point (TEP) termination   |
  45     +---------------------------------------+--------------------------------------+
  46     | Kernel NIC Interface                  | Timer                                |
  47     +---------------------------------------+--------------------------------------+
  48     | Network Layer 2 Forwarding + variants | Vhost                                |
  49     +---------------------------------------+--------------------------------------+
  50     | Network Layer 3 Forwarding + variants | Vhost Xen                            |
  51     +---------------------------------------+--------------------------------------+
  52     | Link Status Interrupt                 | VMDQ Forwarding                      |
  53     +---------------------------------------+--------------------------------------+
  54     | Load Balancer                         | VMDQ and DCB Forwarding              |
  55     +---------------------------------------+--------------------------------------+
  56     | Multi-process                         | VM Power Management                  |
  57     +---------------------------------------+--------------------------------------+
  58
  59 These examples range from simple to reasonably complex but most are designed
  60 to demonstrate one particular feature of DPDK. Some of the more interesting
  61 examples are highlighted below.
  62
  63
  64 * :doc:`Hello World<hello_world>`: As with most introductions to a
  65   programming framework a good place to start is with the Hello World
  66   application. The Hello World example sets up the DPDK Environment Abstraction
  67   Layer (EAL), and prints a simple "Hello World" message to each of the DPDK
  68   enabled cores. This application doesn't do any packet forwarding but it is a
  69   good way to test if the DPDK environment is compiled and set up properly.
  70
  71 * :doc:`Basic Forwarding/Skeleton Application<skeleton>`: The Basic
  72   Forwarding/Skeleton contains the minimum amount of code required to enable
  73   basic packet forwarding with DPDK. This allows you to test if your network
  74   interfaces are working with DPDK.
  75
  76 * :doc:`Network Layer 2 forwarding<l2_forward_real_virtual>`: The Network Layer 2
  77   forwarding, or ``l2fwd`` application does forwarding based on Ethernet MAC
  78   addresses like a simple switch.
  79
  80 * :doc:`Network Layer 3 forwarding<l3_forward>`: The Network Layer3
  81   forwarding, or ``l3fwd`` application does forwarding based on Internet
  82   Protocol, IPv4 or IPv6 like a simple router.
  83
  84 * :doc:`Packet Distributor<dist_app>`: The Packet Distributor
  85   demonstrates how to distribute packets arriving on an Rx port to different
  86   cores for processing and transmission.
  87
  88 * :doc:`Multi-Process Application<multi_process>`: The
  89   multi-process application shows how two DPDK processes can work together using
  90   queues and memory pools to share information.
  91
  92 * :doc:`RX/TX callbacks Application<rxtx_callbacks>`: The RX/TX
  93   callbacks sample application is a packet forwarding application that
  94   demonstrates the use of user defined callbacks on received and transmitted
  95   packets. The application calculates the latency of a packet between RX
  96   (packet arrival) and TX (packet transmission) by adding callbacks to the RX
  97   and TX packet processing functions.
  98
  99 * :doc:`IPSec Security Gateway<ipsec_secgw>`: The IPSec Security
 100   Gateway application is minimal example of something closer to a real world
 101   example. This is also a good example of an application using the DPDK
 102   Cryptodev framework.
 103
 104 * :doc:`Precision Time Protocol (PTP) client<ptpclient>`: The PTP
 105   client is another minimal implementation of a real world application.
 106   In this case the application is a PTP client that communicates with a PTP
 107   master clock to synchronize time on a Network Interface Card (NIC) using the
 108   IEEE1588 protocol.
 109
 110 * :doc:`Quality of Service (QoS) Scheduler<qos_scheduler>`: The QoS
 111   Scheduler application demonstrates the use of DPDK to provide QoS scheduling.
 112
 113 There are many more examples shown in the following chapters. Each of the
 114 documented sample applications show how to compile, configure and run the
 115 application as well as explaining the main functionality of the code.