Hi, > Unfortunately, there were no further replies to that thread but I did see > that my same question "pops up every once in a while". Anyway, my specific > problem is I'm trying to QPSK demodulate + RS decode a 2MS/s, 1Mbps bit rate, > 10GB IQ file. This works fine, but I'm getting a different number of > successfully decoded packets every run. I am using a throttle block, and in > fact tried to reduce the throttling rate to 200KHz (samplingrate/10), but it > still doesn't seem to work. As for how much CPU my flowgraph is utilizing, it > takes up around 80% of all 8 of my CPU cores at the regular sampling rate, > while taking around 30% of my cores at samplingrate/10. Do you guys have any > idea on what might be going on? The thread I'm referencing is from 2013, but > is it still relevant? Any technical reasons for the non-deterministic > behavior? I'm using 3.7.13.2.
Depends on your flow graph obviously, but in general, no. Unless for the obviously "random" blocks (like noise generators and such), AFAIK most other blocks should have a deterministic behavior (at least when running on the same exact GR version). Usually undeterministic behavior points to a bug in one of the blocks that doesn't properly deal with the boundaries in the work() call. cheers, Sylvain _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
