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
latency test cases, *X-axis labels* are indeces of csit-dpdk-perf-1704 jobs
that created result output files used as data sources for the graph,
*Y-axis labels* are measured packet Latency [uSec] values, and the *graph
legend* identifes the plotted test suites.
.. note::
Data sources for reported test results: i) FD.io test executor jobs
`csit-dpdk-perf-1704-all `_ ,
ii) archived FD.io jobs test result output files
`csit-dpdk-perf-1704-all#job-number `_.
Testpmd packet latency - running in configuration of **one worker thread (1t) on one
physical core (1c)** - is presented in the figure below.
.. raw:: html
*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
*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