In addition to what Paul wrote: GNU Radio automatically spawns a thread for *every* GNU Radio block. Many of the blocks you see, however, are hierarchical blocks containing multiple blocks inside.
Also note that a question like "how many threads are spawned" can easily be answered using tools like htop, which are able to list each thread and its CPU usage. So, if your multithreaded code crashes: well, multithreaded code tends to do that if you're not very strict about keeping the data of multiple threads cleanly separated and spend a lot of thought on how to partition your problem. GNU Radio takes that off your shoulders :) Best regards, Marcus On 11/02/2016 04:24 PM, Garver, Paul W wrote: > > You should read the accompanying academic papers, especially [1]. It > should run in real-time with any sort of reasonable hardware. I'm not > sure why you would want to re-implement the decoder. > > > > > > [1] http://www.ccs-labs.org/bib/bloessl2013towards/bloessl2013towards.pdf > > Towards an Open Source IEEE802.11p Stack: A Full SDR-based ... > <http://www.ccs-labs.org/bib/bloessl2013towards/bloessl2013towards.pdf> > www.ccs-labs.org > Towards an Open Source IEEE802.11p Stack: A Full SDR-based Transceiver > in GNURadio Bastian Bloessl , Michele Segatay, Christoph Sommer and > Falko Dressler > > > ------------------------------------------------------------------------ > *From:* Discuss-gnuradio > <discuss-gnuradio-bounces+garverp=gatech....@gnu.org> on behalf of > sumitstop <sumit.ku...@research.iiit.ac.in> > *Sent:* Wednesday, November 2, 2016 9:41:48 AM > *To:* Discuss-gnuradio@gnu.org > *Subject:* [Discuss-gnuradio] gr-ieee 802.11 and threads for real time > > Hello, > > I am in the process of constructing my own 802.11 receiver using C and > UHD. > I was looking at the implementation of gr-ieee 802.11. > > I am trying to figure out how many parallel threads it is using for the > receiver and transmitter. In order to work in real time, especially > decoding > 802.11 packets in real time you need multiple threads. Also I am wondering > if the threading stuff is being taken care by gr-ieee 802.11 package > or GNU > Radio. Because I coudn't find any threading related stuff in the mentioned > package. > > In my code, I am using pthreads, there is a thread pool which creates 50 > threads for receiver. > But it crashes and goes out of sync for almost 60% of the times. I was > wondering if I can get some clue to deal with real time decoding from > users. > > Regards > Sumit > > > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/gr-ieee-802-11-and-threads-for-real-time-tp61872.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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