hi jan, > I'm developing quite a similar system for experiments in our Oculomotor > Lab. >
this sounds interesting. do you have some more info or links or papers? > The graphics framework does already work quite well. There are only some > rare occurrences where the SCHED_FIFOed graphics thread hasn't finished > drawing the next frame on VSYNC. I guess they are due to some kind of > priority inversion in thread synchronisation. Another try would be with > the low latency patches as we are still using a stock 2.6 kernel. my suggestion would be to use a 2.4 kernel with low-latency patches. all things i tried for my audio work with the 2.6 kernels were far worse than 2.4, which runs rock solid for the response i need. > CPU > and system load is really low (~ 5% with jumping point paradigm). > I haven't looked further into these timing issues however since I'm just > occupied with implementing a Comedi link for data acquisition and > experiment control. > > My current development setup: > - AMD Duron 800 system > - Matrox G550 > - Debian Sarge with kernel 2.6.8 > - CVS versions of DirectFB, DFB++, DirectFBGL > - Villes Mesa-embedded-2-branch-2004-07-15 with freeglut-directfb > - Comedi 0.7.69 > thanks for the info! cheers tom
