netperf-2.5 UDP_STREAM test was run over 3 reboot iterations, with each iteration having 1 warm up run and 10 recorded netperf runs.
On IPv6 UDP checksums are mandatory, so we did not turn them off for comparisons.
As we expect the IPv4 tests with checksumming turned off perform best. However IPv6 UDP is behind IPv4 UDP with checksumming turned on and zooming in gives us a clearer view.
As with TCP the range of data and in some cases the interquartile range (IQR) is huge. There are also a significant number of outliners with UDP.
x hydra1/test_netperf_udp4_default_nocksum.stat + hydra1/test_netperf_udp4_nooffload_nocksum.stat * hydra1/test_netperf_udp4_default.stat % hydra1/test_netperf_udp4_nooffload.stat # hydra1/test_netperf_udp6_default.stat @ hydra1/test_netperf_udp6_nooffload.stat +--------------------------------------------------------------------------+ | @ | | O | | O | | @O %%% | | @O## %%% * | | OO## %%%% + x * | | OO#O O%%%%% + x * * | | OOOO O%%%O% @+ x+ x xxx**xxO * * ++* + + | | @@OOOO#OO@%OOO*@* x* x#**O***xOOx*+** ++** *+++ O* **+@ ++ +++| | |_______M_A__________| | | |______________M_A________________| | | |_________MA__________| | | |_______M__A__________| | ||____M__A______| | ||___M__A_____| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 30 3849.72 6695.55 4718.12 4857.502 703.14638 + 30 4016.47 7799 5719.16 5843.6737 1151.5795 Difference at 95.0% confidence 986.172 +/- 493.179 20.302% +/- 10.1529% (Student's t, pooled s = 954.083) * 30 3705.32 6678.58 4947.48 4976.4857 717.89929 No difference proven at 95.0% confidence % 30 3552.05 6880.28 3749.02 3955.13 741.89795 Difference at 95.0% confidence -902.372 +/- 373.616 -18.5769% +/- 7.69153% (Student's t, pooled s = 722.782) # 30 3109.47 5032.19 3223.09 3416.2583 507.03191 Difference at 95.0% confidence -1441.24 +/- 316.86 -29.6705% +/- 6.5231% (Student's t, pooled s = 612.983) @ 30 3005.88 5138.53 3201.3 3345.5933 416.3398 Difference at 95.0% confidence -1511.91 +/- 298.684 -31.1252% +/- 6.14892% (Student's t, pooled s = 577.821)