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+L2 Ethernet Switching
+=====================
+
+This section provides a summary of Testpmd Phy-to-Phy L2 Ethernet looping
+performance illustrating packet latency measured at 50% of discovered NDR
+throughput rate. Latency is reported for Testpmd running in multiple
+configurations of Testpmd worker thread(s), a.k.a. Testpmd data plane thread
+(s), and their physical CPU core(s) placement.
+
+Title of each graph is a regex (regular expression) matching all plotted
+test case throughput measurements.
+
+.. note::
+
+    Data sources for reported test results: i) FD.io test executor jobs
+    `csit-dpdk-perf-1701-all <https://jenkins.fd.io/view/csit/job/csit-dpdk-perf-1701-all/>`_
+    and
+    `csit-dpdk-perf-1701-long <https://jenkins.fd.io/view/csit/job/csit-dpdk-perf-1701-long/>`_
+    , ii) archived FD.io jobs test result output files
+    `csit-dpdk-perf-1701-all#job-number <https://nexus.fd.io/link>`_.
+
+Testpmd packet latency - running in configuration of **one worker thread (1t) on one
+physical core (1c)** - is presented in the figure below.
+
+.. raw:: html
+
+    <iframe width="700" height="700" frameborder="0" scrolling="no" src="../../_static/testpmd/64B-1t1c-l2-ndrdisc-lat50.html"></iframe>
+
+*Figure 1. Testpmd 1thread 1core - packet latency for Phy-to-Phy L2 Ethernet Looping.*
+
+CSIT test cases used to generate results presented above can be found in CSIT
+git repository by filtering with specified regex as follows:
+
+.. code-block:: bash
+
+    $ csit/tests/perf
+    $ grep -E "64B-1t1c-(eth|dot1q|dot1ad)-(l2xcbase|l2bdbasemaclrn)-ndrdisc" *
+
+    10ge2p1x520-eth-l2xcbase-ndrdisc.robot:| tc01-64B-1t1c-eth-l2xcbase-ndrdisc
+
+Testpmd packet latency - running in configuration of **two worker threads (2t)
+on two physical cores (2c)** - is presented in the figure below.
+
+.. raw:: html
+
+    <iframe width="700" height="700" frameborder="0" scrolling="no" src="../../_static/testpmd/64B-2t2c-l2-ndrdisc-lat50.html"></iframe>
+
+*Figure 2. Testpmd 2thread 2core - packet latency for Phy-to-Phy L2 Ethernet Looping.*
+
+CSIT test cases used to generate results presented above can be found in CSIT
+git repository by filtering with specified regex as follows:
+
+.. code-block:: bash
+
+    $ csit/tests/perf
+    $ grep -E "64B-2t2c-(eth|dot1q|dot1ad)-(l2xcbase|l2bdbasemaclrn)-ndrdisc" *
+
+    10ge2p1x520-eth-l2xcbase-ndrdisc.robot:| tc07-64B-2t2c-eth-l2xcbase-ndrdisc
+
+Testpmd packet latency - running in configuration of **four worker threads (4t)
+on four physical cores (4c)** - is presented in the figure below.
+
+.. raw:: html
+
+    <iframe width="700" height="700" frameborder="0" scrolling="no" src="../../_static/testpmd/64B-4t4c-l2-ndrdisc-lat50.html"></iframe>
+
+*Figure 3. Testpmd 4thread 4core - packet latency for Phy-to-Phy L2 Ethernet Looping.*
+
+CSIT test cases used to generate results presented above can be found in CSIT
+git repository by filtering with specified regex as follows:
+
+.. code-block:: bash
+
+    $ csit/tests/perf
+    $ grep -E "64B-4t4c-(eth|dot1q|dot1ad)-(l2xcbase|l2bdbasemaclrn)-ndrdisc" *
+
+    10ge2p1x520-eth-l2xcbase-ndrdisc.robot:| tc13-64B-4t4c-eth-l2xcbase-ndrdisc
+