Hello again, My python code is actually inspired from "Packet Encoder" block (/path/to/gnuradio/.../grc_gnuradio/blks2/packet.py) were I suffer from the same issue. I wrote that python script to make it very simple/short and confirm the troubles.
I would be honored if someone could get a try on it to confirm whether or not it is reproducible. I'm wondering if the bug is in GnuRadio or between the chair and the screen.. Thank you very much ! Jerome 2014-06-29 16:08 GMT+02:00 Jérôme Nokin <jerome.no...@gmail.com>: > Hello, > > > I'm using Gnuradio version: v3.7.2.1-62 and am facing a strange issue > with message queuing. > > I wrote a testing "hier" block which holds 2 message blocks (source + sink). > > --------------- > #create blocks > msgq_in = gr.msg_queue(2) > msgq_out = gr.msg_queue(2) > msg_sink = blocks.message_sink(gr.sizeof_char, msgq_in, False) > msg_source = blocks.message_source(gr.sizeof_char, msgq_out) > > #connect > self.connect(self, msg_sink) > self.connect(msg_source, self) > --------------- > > > The hier block run a thread which read messages from the message_sink > and send them to message_source. Nothing more. > The final flow graph is "File source" -> "Hier block" -> "File Sink" > > The full python code is here: > http://pastebin.com/AfFhEGQ6 > > The problem: > > /tmp/source contains "abcdefghijklmnopqrstuvwxz0123456789" + new line: > > $ hexdump -C /tmp/source > 00000000 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70 |abcdefghijklmnop| > 00000010 71 72 73 74 75 76 77 78 7a 30 31 32 33 34 35 36 |qrstuvwxz0123456| > 00000020 37 38 39 0a |789.| > > When I run the Gnuradio script for a few seconds, I expect to found > the following in /tmp/sink: > > $ head /tmp/sink > abcdefghijklmnopqrstuvwxz0123456789 > abcdefghijklmnopqrstuvwxz0123456789 > abcdefghijklmnopqrstuvwxz0123456789 > abcdefghijklmnopqrstuvwxz0123456789 > abcdefghijklmnopqrstuvwxz0123456789 > [...] > > However, from time to time, bytes are missing: > > $ grep -v abcdefghijklmnopqrstuvwxz0123456789 /tmp/sink > abcdefghijklmnopqrstuvwxz012qrstuvwxz0123456789 > abcdeqrstuvwxz0123456789 > abcklmnopqrstuvwxz0123456789 > abcdefghijklmnopqrstuvwxz01234stuvwxz0123456789 > abcdefghijklmnopqrstuvwx > > > Am I doing something wrong ? > > Thank you very much for your feedback. > > Regards, > Jerome _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
