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 see the IPv4 tests with checksumming turned off still perform best. Further IPv6 UDP with "offload support" is still behind IPv4 UDP with checksumming turned on and zooming in helps us to see that we are catching up.
The range of data and in several cases the interquartile range (IQR) is still huge. There are also a significant number of outliners with UDP in the no offload cases.
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 +--------------------------------------------------------------------------+ | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @ | | @@ %%% # * | | @@ %%% x # x # * x + | | @@@ @#%% x ## # ## # # x+#** #++*+xx * *x + | | @@@@@ @#%@ %Ox #O # #*OO#+*#OOO***O**##O**O*** ***+*x* ++*x ++x* **| | |____________MA______________| | | |_________MA___________| | | |____________MA____________| | | |_MA__| | | |________MA_________| | ||____M_A_______| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 30 4117.36 8328.19 6137.8 6236.2927 1136.704 + 30 5005.63 8235.45 6465.39 6562.7983 931.47838 No difference proven at 95.0% confidence * 30 4484.1 8755.31 6528.77 6582.2703 1061.2698 No difference proven at 95.0% confidence % 30 3406.81 4680.59 3697.94 3769.4827 256.3195 Difference at 95.0% confidence -2466.81 +/- 425.913 -39.5557% +/- 6.82958% (Student's t, pooled s = 823.953) # 30 3683.22 6583.07 5112.01 5195.592 787.95379 Difference at 95.0% confidence -1040.7 +/- 505.542 -16.6878% +/- 8.10645% (Student's t, pooled s = 978) @ 30 3098.59 5689.79 3355.83 3551.4927 594.82049 Difference at 95.0% confidence -2684.8 +/- 468.928 -43.0512% +/- 7.51934% (Student's t, pooled s = 907.168)