j.p.schulz wrote: > I measured the maxroundtrip time with the addon example, and with a > modiefied version (wich sets the lpt ports, when sending and recieving > packets). > > The measured times are changing periodicly. ( cycle time 5000; offset 200; > interval 10; packetsize 1000 -> min rtriptime 3,3ms increasing for 34seconds > to a max rtriptime 8,2ms then 3,3ms inreasing for 34sec .... - cyclic) > the cycle time from min to max changes with the sending interval - but not > linear. > > Is that normal? is it because of the switch i use? >
With your parameters, this is normal. The switch does not have any significant effect here. Have a look at http://fozzie.homelinux.org/documents/rtnet/ for an explanation (for all other readers: it's in German). Just note that the authors used an older RTnet version and that some of their figures look a bit "strange" (they admitted that they used a non-rt capturing system for some measurements). However, they observed the same typical latency shapes and explained it well. Jan ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
