On Sat, 14 Apr 2012 13:40:35 +0200, Martin Braun wrote: > On Sat, Apr 14, 2012 at 05:20:13PM +0800, Alick Zhao wrote: >> Yes the bug still occurs. >> >> I just wrote a simple script to ran the test for 50 times on T60 with >> Ubuntu, GNU Radio 3.5.3 equipped, before and after FREQUENCY_OFFSET set >> to 0. All failed the test. (n_pass is 0/50 in both sets) Every test's >> output is almost identical in each set except particular test time >> length. The ones before FREQUENCY_OFFSET change is basically the same as >> test.t60.log already attached. One of the ones with FREQUENCY_OFFSET set >> to 0 is attached below. I guess the almost same contents of output is >> due to fixed random seed. >> >> I also ran the script on a Dell desktop with Fedora, and the result is >> 50/50 pass the test. Then I notice one line in the qa python file says >> that seed 1234 fails. However, 50/50 are OK with seed 1234 on the Dell >> desktop. > > So, > > I tried this on a native 32-Bit Ubuntu 11.10, and it fails (tells me > it's using "Volk machine: sse3_32". > > I also noticed the line that says seed=1234 fails. Also, the seed is set > multiple times in the script. If this is the source of the bug or not, > it should be fixed, because the seed is reset somewhere in the guts of > the test. I'll post a patch on patch-gnuradio--this eliminates the > problem on my machine, for some reason. If it does the same for you, > this might actually be the solution. > > MB > >
I applied the patch and tested it. No failure, yeah! However, with my debugging line, I can see this: [...] constellation: <constellation psk (m=32)> differential: True correct: 0.942307692308 constellation: <constellation psk (m=64)> differential: True correct: 0.772435897436 constellation: <constellation psk (m=2)> differential: True correct: 1.0 [...] So why 0.77XXX on the second line does not cause the assert to fail? alick _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
