For the finer points of performance measurement I defer to Rob. This is a 
highlevel coarse view:
With a VSWITCH with LACP involved and using two full IFL's with 4 OSA GbE I 
could barely exceed 100 MB/s with no other activity at all. With the same 2 
IFL's and 4 OSA dedicated and bonded within Linux I have seen 175 MB/s with 
other activity going on. See sample from TSM performance instrumentation:
TOTAL SERVER SUMMARY
Operation       Count  Tottime  Avgtime  Maxtime InstTput RealTput  Total KB
----------------------------------------------------------------------------
Disk Read      354044 1929.524    0.005    0.517  17011.1   9270.3  32823388
Disk Write     2693971 16382.664    0.006    0.766  35619.5 164809.4 583542652
Disk Commit       378    1.432    0.004    0.090
Tape Read        6307   26.320    0.004    0.147  61100.4    454.2   1608193
Tape Write     131942  464.451    0.004    1.061  72719.1   9538.9  33774493
Tape Locate         5  139.922   27.985   64.225
Tape Commit        10   32.018    3.202   14.161
Tape Data Copy 241324   26.308    0.000    0.190
Tape Misc           3   49.823   16.608   16.861
Data Copy        6268    1.511    0.000    0.036
Network Recv   56592336 65035.178    0.001  940.637   8939.0 164189.4 581347509
Network Send     2767    0.141    0.000    0.006   1522.7      0.1       216
Tm Lock Wait       47    8.911    0.190    0.932
Acquire Latch   49921    5.080    0.000    0.275
Acquire XLatch  70034    1.402    0.000    0.288
Thread Wait    5340114 105207.622    0.020 3501.058

Best regards,
Pieter Harder

pieter.har...@brabantwater.nl
tel  +31-73-6837133 / +31-6-47272537

-----Oorspronkelijk bericht-----
Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Sterling James
Verzonden: maandag 26 oktober 2009 21:03
Aan: LINUX-390@VM.MARIST.EDU
Onderwerp: Re: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

Hi Pieter,
Do you have any numbers to compare vswitch vs native? OSA throughput, and
cpu?
Thanks

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