IPv4 Overlay Tunnels
====================

This section includes summary graphs of VPP Phy-to-Phy packet latency
with IPv4 Overlay Tunnels measured at 50% of discovered NDR throughput
rate. Latency is reported for VPP running in multiple configurations of
VPP worker thread(s), a.k.a. VPP data plane thread(s), and their
physical CPU core(s) placement.

Results are generated from a single execution of CSIT NDR discovery
test. Box plots are used to show the Minimum, Average and Maximum packet
latency per test.

*Title of each graph* is a regex (regular expression) matching all
throughput test cases plotted on this graph, *X-axis labels* are indices
of individual test suites executed by csit-vpp-perf-1704-all job that
created result output file used as data source for the graph, *Y-axis
labels* are measured packet Latency [uSec] values, and the *Graph
legend* lists the plotted test suites and their indices. Latency is
reported for concurrent symmetric bi-directional flows, separately for
each direction: i) West-to-East: TGint1-to-SUT1-to-SUT2-to-TGint2, and
ii) East-to-West: TGint2-to-SUT2-to-SUT1-to-TGint1.

.. note::

    Test results have been generated by FD.io test executor jobs
    `csit-vpp-perf-1704-all
    <https://jenkins.fd.io/view/csit/job/csit-vpp-perf-1704-all/>`_,
    with Robot Framework result files csit-vpp-perf-1704-all-<id>.zip
    `archived here <../../_static/archive/>`_

VPP packet latency in 1t1c setup (1thread, 1core) is presented in the graph below.

.. raw:: html

    <iframe width="700" height="1000" frameborder="0" scrolling="no" src="../../_static/vpp/64B-1t1c-ethip4-ndrdisc-lat50.html"></iframe>

*Figure 1. VPP 1thread 1core - packet latency for Phy-to-Phy IPv4 Overlay Tunnels.*

CSIT source code for the test cases used for above plots can be found in CSIT
git repository:

.. code-block:: bash

    $ cd $CSIT/tests/perf
    $ grep -E "64B-1t1c-ethip4[a-z0-9]+-[a-z0-9]*-ndrdisc" *

    10ge2p1x520-ethip4lispip4-ip4base-ndrdisc.robot:| tc01-64B-1t1c-ethip4lispip4-ip4base-ndrdisc
    10ge2p1x520-ethip4lispip6-ip4base-ndrdisc.robot:| tc01-64B-1t1c-ethip4lispip6-ip4base-ndrdisc
    10ge2p1x520-ethip4vxlan-l2bdbasemaclrn-ndrdisc.robot:| tc01-64B-1t1c-ethip4vxlan-l2bdbasemaclrn-ndrdisc
    10ge2p1x520-ethip4vxlan-l2xcbase-ndrdisc.robot:| tc01-64B-1t1c-ethip4vxlan-l2xcbase-ndrdisc

VPP packet latency in 2t2c setup (2thread, 2core) is presented in the graph below.

.. raw:: html

    <iframe width="700" height="1000" frameborder="0" scrolling="no" src="../../_static/vpp/64B-2t2c-ethip4-ndrdisc-lat50.html"></iframe>

*Figure 2. VPP 2threads 2cores - packet latency for Phy-to-Phy IPv4 Overlay Tunnels.*

CSIT source code for the test cases used for above plots can be found in CSIT
git repository:

.. code-block:: bash

    $ cd $CSIT/tests/perf
    $ grep -E "64B-2t2c-ethip4[a-z0-9]+-[a-z0-9]*-ndrdisc" *

    10ge2p1x520-ethip4lispip4-ip4base-ndrdisc.robot:| tc07-64B-2t2c-ethip4lispip4-ip4base-ndrdisc
    10ge2p1x520-ethip4lispip6-ip4base-ndrdisc.robot:| tc07-64B-2t2c-ethip4lispip6-ip4base-ndrdisc
    10ge2p1x520-ethip4vxlan-l2bdbasemaclrn-ndrdisc.robot:| tc07-64B-2t2c-ethip4vxlan-l2bdbasemaclrn-ndrdisc
    10ge2p1x520-ethip4vxlan-l2xcbase-ndrdisc.robot:| tc07-64B-2t2c-ethip4vxlan-l2xcbase-ndrdisc