[4/6] Section 4: Running Applications

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+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2010-2025 Intel Corporation.
+
+Running Applications
+====================
+
+.. toctree::
+    :maxdepth: 2
+
+    run_apps
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+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2010-2025 Intel Corporation.
+
+.. _run_apps:
+
+Running Applications
+====================
+
+The following instructions apply to Linux, FreeBSD, and Windows.
+
+.. contents:: Table of Contents
+   :local:
+
+Running Applications on Linux and FreeBSD
+-----------------------------------------
+
+Compiling and Running Sample Applications
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+To compile a sample application:
+
+1. Navigate to the application's directory in the DPDK distribution.
+2. Execute the ``make`` command on Linux or ``gmake`` on FreeBSD.
+
+For instance, to compile the ``helloworld`` application:
+
+::
+
+    cd examples/helloworld
+    make    # On Linux
+    gmake   # On FreeBSD
+
+To run the application, use:
+
+::
+
+    ./build/helloworld -l 0-2
+
+The ``-l`` option indicates the cores on which the application should run.
+
+Sample Applications Overview
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+1. **Hello World**: A basic application that prints a "hello world" message.
+2. **Basic Forwarding**: A skeleton example of a forwarding application.
+3. **Command Line**: Demonstrates the command line interface in DPDK.
+4. **Ethtool**: Showcases the Ethtool API in DPDK.
+
+For a comprehensive list of sample applications and their guides, 
+refer to the `DPDK Sample Applications User Guides <https://doc.dpdk.org/guides/sample_app_ug/index.html>`_.
+
+EAL Parameters
+^^^^^^^^^^^^^^
+
+Every DPDK application is linked with the DPDK target environment’s 
+Environmental Abstraction Layer (EAL) library, which provides generic options. 
+Some of these options include:
+
+- ``-c COREMASK`` or ``-l CORELIST``: Specifies the cores to run on.
+- ``-n NUM``: Number of memory channels per processor socket.
+- ``--socket-mem``: Memory allocation from hugepages on specific sockets.
+
+For a detailed list of EAL options, 
+refer to the `EAL parameters section <eal_parameters>`.
+
+Running Without Root Privileges
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Refer to :ref:`running_dpdk_apps_without_root`.
+
+Running Applications on Windows
+-------------------------------
+
+Running DPDK applications on Windows involves a few different steps. 
+This guide provides detailed instructions on how to run the helloworld example
+application, which can be used as a reference for running other DPDK applications.
+
+Grant Lock Pages in Memory Privilege
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Use of hugepages ("large pages" in Windows terminology) requires
+``SeLockMemoryPrivilege`` for the user running an application. 
+This privilege allows the DPDK application to keep data in physical memory, 
+preventing the system from paging the data to virtual memory. 
+This can significantly improve the performance of your DPDK applications.
+
+To grant this privilege:
+
+1. Open Local Security Policy snap-in, either through Control Panel / Computer Management / Local Security Policy, or by pressing Win+R, typing ``secpol``, and pressing Enter.
+2. Open Local Policies / User Rights Assignment / Lock pages in memory.
+3. Add desired users or groups to the list of grantees.
+
+The privilege is applied upon the next logon. If the privilege has been granted to the
+current user, a logoff is required before it is available. 
+More details can be found in the `Large-Page Support in MSDN <https://docs.microsoft.com/en-us/windows/win32/memory/large-page-support>`_.
+
+Running the helloworld Example
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+After setting up the drivers, you can run the helloworld example to verify your setup.
+Here are the steps:
+
+1. Navigate to the examples in the build directory::
+
+        cd C:\\Users\\me\\dpdk\\build\\examples
+
+2. Run the helloworld application::
+
+        dpdk-helloworld.exe -l 0-3
+
+The output should display a hello message from each core, like this:
+
+::
+
+    hello from core 1
+    hello from core 3
+    hello from core 0
+    hello from core 2