|WARNING| pw151551 [PATCH v2] doc: reword sample application guides

[qemudev at loongson.cn]

Test-Label: loongarch-compilation
Test-Status: WARNING
http://dpdk.org/patch/151551

_apply patch failure_

Submitter: Nandini Persad <nandinipersad361 at gmail.com>
Date: Sun, 16 Feb 2025 15:09:03 -0800
DPDK git baseline: Repo:dpdk
  Branch: main
  CommitID: e5176f23ae8b31437c3e5eb875c81f95bf3a9942

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This chapter describes the example applications for multi-processing that are included in the DPDK.

Example Applications
--------------------

Building the Sample Applications
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The multi-process example applications are built in the same way as other sample applications,
and as documented in the *DPDK Getting Started Guide*.


To compile the sample application see :doc:`compiling`.

The applications are located in the ``multi_process`` sub-directory.


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PTP Client Sample Application
=============================

The PTP (Precision Time Protocol) client sample application is a simple
example of using the DPDK IEEE1588 API to communicate with a PTP master clock
to synchronize the time on the NIC and, optionally, on the Linux system.

Note, PTP is a time syncing protocol and cannot be used within DPDK as a
time-stamping mechanism. See the following for an explanation of the protocol:
`Precision Time Protocol
<https://en.wikipedia.org/wiki/Precision_Time_Protocol>`_.


Limitations
-----------

The PTP sample application is intended as a simple reference implementation of
a PTP client using the DPDK IEEE1588 API.
In order to keep the application simple the following assumptions are made:

* The first discovered master is the main for the session.
* Only L2 PTP packets are supported.
* Only the PTP v2 protocol is supported.
* Only the slave clock is implemented.


How the Application Works
-------------------------

. _figure_ptpclient_highlevel:


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