On Wednesday 06 May 2009 18:35:36 Dominik Auras wrote: > Do you have, maybe, an idea why TX bandwidth is limited? Interestingly > enough, 32.7 Mb/s is the limit on my computer and my notebook. Of > course, I made the tx loop on the host as short as possible, set > SCHED_FIFO and rtprio to 49, and played with fusb_nblock/size etc.
Are you transmitting random data, or a stream of zeros? In the latter case (IIRC), every 6 zeros will have a single 1 added to aid clock recovery, limiting net bandwidth to 6/7 (which is about 42MByte). Try transmitting random data, a stream of ones should be fine to. For detail have a look at the USB spec. Stefan -- Stefan Brüns / Bergstraße 21 / 52062 Aachen phone: +49 241 53809034 mobile: +49 151 50412019 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
