sounds like a jitter problem. Did he post a bug/request to the preemptive folks? Oh well... To bad the Beagle Board was not better designed for physical computing instead of AV, but I wish you the best of luck on getting this up and running. I look forward to the results ;-)
EBo -- tephen Wille Padnos <spad...@sover.net> said: > EBo wrote: > > >This is only a little OT, but... If the modern kernels work out of the box > >on > >the Cortex-A8, then maybe real-time preemptive would work until RTAI has a > >port ready. IIRC, RT preemtion was running ~10us compared to ~4us on the > >same > >hardware. Those tests though are a few years old, so it might be better now. > > It would also be useful for RT applications which do not have as tight a > >tolerance. > > > > > Not on the Beagleboard. > > Jeff did some work trying to do just what you describe, and it worked OK > some of the time. Other times there would be 400 ms (yes, millisecond) > latencies. His goal was just to use he Beagleboard as the motion > controller, with an FPGA doing the base thread stuff. It wasn't even > suitable for that using the -rt kernel. > > - Steve ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
