doc: new packet ordering app description

This patch describes how to build and run he new packet ordering sample
application that exercises the reorder library.

Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Declan Doherty <declan.doherty@intel.com>

diff --git a/doc/guides/sample_app_ug/index.rst b/doc/guides/sample_app_ug/index.rst
index d07dec3..5720181 100644 (file)
--- a/doc/guides/sample_app_ug/index.rst
+++ b/doc/guides/sample_app_ug/index.rst
@@ -60,6 +60,7 @@ Sample Applications User Guide
     intel_quickassist
     quota_watermark
     timer
+    packet_ordering
     vmdq_dcb_forwarding
     vhost
     netmap_compatibility

diff --git a/doc/guides/sample_app_ug/packet_ordering.rst b/doc/guides/sample_app_ug/packet_ordering.rst
new file mode 100644 (file)
index 0000000..481f1b7
--- /dev/null
+++ b/doc/guides/sample_app_ug/packet_ordering.rst
@@ -0,0 +1,102 @@
+..  BSD LICENSE
+    Copyright(c) 2015 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Packet Ordering Application
+============================
+
+The Packet Ordering sample app simply shows the impact of reordering a stream.
+It's meant to stress the library with different configurations for performance.
+
+Overview
+--------
+
+The application uses at least three CPU cores:
+
+* RX core (maser core) receives traffic from the NIC ports and feeds Worker
+  cores with traffic through SW queues.
+
+* Worker core (slave core) basically do some light work on the packet.
+  Currently it modifies the output port of the packet for configurations with
+  more than one port enabled.
+
+* TX Core (slave core) receives traffic from Woker cores through software queues,
+  inserts out-of-order packets into reorder buffer, extracts ordered packets
+  from the reorder buffer and sends them to the NIC ports for transmission.
+
+Compiling the Application
+--------------------------
+
+#.  Go to the example directory:
+
+    .. code-block:: console
+
+        export RTE_SDK=/path/to/rte_sdk
+        cd ${RTE_SDK}/examples/helloworld
+
+#.  Set the target (a default target is used if not specified). For example:
+
+    .. code-block:: console
+
+        export RTE_TARGET=x86_64-native-linuxapp-gcc
+
+    See the *DPDK Getting Started* Guide for possible RTE_TARGET values.
+
+#.  Build the application:
+
+    .. code-block:: console
+
+        make
+
+Running the Application
+-----------------------
+
+Refer to *DPDK Getting Started Guide* for general information on running applications
+and the Environment Abstraction Layer (EAL) options.
+
+Application Command Line
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+The application execution command line is:
+
+.. code-block:: console
+
+    ./test-pipeline [EAL options] -- -p PORTMASK [--disable-reorder]
+
+The -c EAL CPU_COREMASK option has to contain at least 3 CPU cores.
+The first CPU core in the core mask is the master core and would be assigned to
+RX core, the last to TX core and the rest to Worker cores.
+
+The PORTMASK parameter must contain either 1 or even enabled port numbers.
+When setting more than 1 port, traffic would be forwarderd in pairs.
+For example, if we enable 4 ports, traffic from port 0 to 1 and from 1 to 0,
+then the other pair from 2 to 3 and from 3 to 2, having [0,1] and [2,3] pairs.
+
+The disable-reorder long option does, as its name implies, disable the reordering
+of traffic, which should help evaluate reordering performance impact.