-Following sections provide a summary of VPP Phy-to-Phy IPv6 Overlay Tunnels
-performance illustrating NDR throughput (zero packet loss) and PDR throughput
-(<0.5% packet loss). Performance 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.
-
-*Title of each graph* is a regex (regular expression) matching all plotted
-throughput test cases, *X-axis labels* are indeces of csit-vpp-perf-1704 jobs
-that created result output files used as data sources for the graph,
-*Y-axis labels* are measured Packets Per Second [pps] values, and the *graph
-legend* identifes the plotted test suites.
+Following sections include summary graphs of VPP Phy-to-Phy performance
+with IPv6 Overlay Tunnels, including NDR throughput (zero packet loss)
+and PDR throughput (<0.5% packet loss). Performance 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.
+
+Rresults are generated by multiple executions of the same CSIT tests.
+In order to display variation in measured throughput values, Box-and-
+whisker plots are used to show their quartiles (Min, 1st quartile / 25th
+percentile, 2nd quartile / 50th percentile / mean, 3rd quartile / 75th
+percentile, Max). Outliers are plotted as individual points.
+
+*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 jobs that
+created result output files used as data sources for the graph, *Y-axis
+labels* are measured Packets Per Second [pps] values, and the *Graph
+legend* lists the plotted test suites and their indices.