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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
|
