1 L2 Ethernet Switching
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2 =====================
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4 This section provides a summary of Testpmd Phy-to-Phy L2 Ethernet looping
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5 performance illustrating packet latency measured at 50% of discovered NDR
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6 throughput rate. Latency is reported for Testpmd running in multiple
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7 configurations of Testpmd worker thread(s), a.k.a. Testpmd data plane thread
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8 (s), and their physical CPU core(s) placement.
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10 *Title of each graph* is a regex (regular expression) matching all plotted
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11 latency test cases, *X-axis labels* are indeces of csit-dpdk-perf-1704 jobs
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12 that created result output files used as data sources for the graph,
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13 *Y-axis labels* are measured packet Latency [uSec] values, and the *graph
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14 legend* identifes the plotted test suites.
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18 Data sources for reported test results: i) FD.io test executor jobs
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19 `csit-dpdk-perf-1704-all <https://jenkins.fd.io/view/csit/job/csit-dpdk-perf-1704-all/>`_ ,
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20 ii) archived FD.io jobs test result output files
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21 `csit-dpdk-perf-1704-all#job-number <https://nexus.fd.io/link>`_.
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23 Testpmd packet latency - running in configuration of **one worker thread (1t) on one
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24 physical core (1c)** - is presented in the figure below.
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28 <iframe width="700" height="700" frameborder="0" scrolling="no" src="../../_static/testpmd/64B-1t1c-l2-ndrdisc-lat50.html"></iframe>
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30 *Figure 1. Testpmd 1thread 1core - packet latency for Phy-to-Phy L2 Ethernet Looping.*
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32 CSIT test cases used to generate results presented above can be found in CSIT
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33 git repository by filtering with specified regex as follows:
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35 .. code-block:: bash
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38 $ grep -E "64B-1t1c-(eth|dot1q|dot1ad)-(l2xcbase|l2bdbasemaclrn)-ndrdisc" *
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40 10ge2p1x520-eth-l2xcbase-ndrdisc.robot:| tc01-64B-1t1c-eth-l2xcbase-ndrdisc
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42 Testpmd packet latency - running in configuration of **two worker threads (2t)
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43 on two physical cores (2c)** - is presented in the figure below.
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47 <iframe width="700" height="700" frameborder="0" scrolling="no" src="../../_static/testpmd/64B-2t2c-l2-ndrdisc-lat50.html"></iframe>
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49 *Figure 2. Testpmd 2thread 2core - packet latency for Phy-to-Phy L2 Ethernet Looping.*
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51 CSIT test cases used to generate results presented above can be found in CSIT
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52 git repository by filtering with specified regex as follows:
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54 .. code-block:: bash
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57 $ grep -E "64B-2t2c-(eth|dot1q|dot1ad)-(l2xcbase|l2bdbasemaclrn)-ndrdisc" *
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59 10ge2p1x520-eth-l2xcbase-ndrdisc.robot:| tc07-64B-2t2c-eth-l2xcbase-ndrdisc
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