2012-03-03 p4 @206131M UDP

Test runs

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.
netperf needed a patch to be able to run this test on IPv6, which by now is part of the port and the upstream trunk revision.

On IPv6 UDP checksums are mandatory, so we did not turn them off for comparisons.

IPv4/UDP with and without offloading turned on, with and without checksumming turned on, and IPv6/UDP with and without offloading turned on

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.

IPv4/UDP w/ and w/o offloading, w/ and w/o checksumming, IPv6/UDP numbers w/ and w/o offloading on IPv4/UDP w/ and w/o offloading, w/ and w/o checksumming, IPv6/UDP numbers w/ and w/o offloading on (zoomed in) 
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*                    |
|     @O                                             OO                    |
|     OO@                                           %OO                    |
|   # OO@                                         % %OO              *x    |
|   # OO@                                         % %OO             +**    |
| @ ##OO@                                         %*OOO         x+ x****   |
|#@###OO@                                         %*OOO       x+x+ *****+ +|
|#@OOOOO@                                   % % %*%*OOOO     +x+*+x******++|
|                                                                 |_AM_|   |
|                                                                |__AM__|  |
|                                                   |A|                    |
|                                                |__AM|                    |
|   |AM|                                                                   |
|   |_AM|                                                                  |
+--------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x  30       5368.02       5558.67       5508.52      5490.151     54.008218
+  30       5333.76       5607.16        5502.8     5493.3683     66.594082
No difference proven at 95.0% confidence
*  30        5107.9       5219.41       5186.66      5181.557     25.270552
Difference at 95.0% confidence
	-308.594 +/- 21.7948
	-5.62087% +/- 0.39698%
	(Student's t, pooled s = 42.1633)
%  30       4999.33       5221.67       5182.04     5159.3187     51.909327
Difference at 95.0% confidence
	-330.832 +/- 27.3805
	-6.02592% +/- 0.498721%
	(Student's t, pooled s = 52.9692)
#  30       4128.63       4259.98        4222.2      4217.663     37.613551
Difference at 95.0% confidence
	-1272.49 +/- 24.0564
	-23.1777% +/- 0.438174%
	(Student's t, pooled s = 46.5385)
@  30       4151.75       4271.11       4247.59      4232.549     35.397842
Difference at 95.0% confidence
	-1257.6 +/- 23.6029
	-22.9065% +/- 0.429914%
	(Student's t, pooled s = 45.6612)