Hi,
Hello everyone, I am trying to implement some relaying schemes in gnuradio which require fast response from the relay. I only know how to use flow graphs at the moment so I made my code with flowgraphs and the delay from receiving a packet until I retransmit it is about 10ms. I'm using USRP1 and the sampling rate is 2MSPS and I use the autotransmit capability of USRP. First of all I'm trying to understand where the delay comes from. I'm sure the delay is not due to processing time of the packet because the processing is very simple. I don't know about latencies in the kernel though. I read in a paper that the time it takes for data to go from user space to kernel is only 200us. Secondly I would like to know if using mblocks has any chance of reducing this delay. By the way is there any documentation for the mblocks? Thanks Manolis 1) The following page may be useful: http://gnuradio.org/trac/wiki/UsrpFAQ/Latency 2) Did you tried to increase sampling rate up to 4MHz ? 3) How did you measured the delay ? Best Regards, Firas -- View this message in context: http://www.nabble.com/Question-about-latency-tp22824860p22844566.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
