Joe, Were these results obtained with 40 iterations for bp and norder = 3 for signals at or within 10 Hz of nfqso? If so, it might be interesting to see how the numbers would change if you dropped back to norder=2 for all signals. Steve
> On Jun 30, 2017, at 9:25 AM, Joe Taylor <j...@princeton.edu> wrote: > > Hi all, > > Thanks for a busy ~20 hours of many people testing FT8. I now have > accumulated a directory with 527 *.wav files, each of which has at least one > visible FT8 signal. The files were recorded at K1JT at either 14.079 or > 50.313 MHz. > > Running the r7753 stand-alone slow-mode decoder jt9[.exe] on this collection > of files produces 574 valid decodes and 0 false decodes with total execution > time 39.8 s. The average time to process a 15 s Rx sequence on this machine > (Core i7-6700 @ 3.4 GHz) is thus 39.8/527 = 0.076 s. Not bad! > > Here's the detailed execution-time breakdown from timer.out: > > Name Time Frac dTime dFrac Calls > ---------------------------------------------------------- > jt9 39.828 1.00 0.734 0.02 1 > read_wav 0.121 0.00 0.121 0.00 27404 > decft8 38.973 0.98 0.133 0.00 527 > sync8 4.191 0.11 4.191 0.11 527 > ft8b 34.648 0.87 0.051 0.00 2821 > bpd174 1.480 0.04 1.480 0.04 2821 > osd174 33.117 0.83 33.117 0.83 2210 > ---------------------------------------------------------- > 39.828 1.00 > > Note that 83% of the execution time is spent in routine osd174, 11% in sync8, > and 4% in bpd174 (a contraction for subroutine name bpdecode174). > > It turns out that only 14 of the 574 decodes were produced by osd174, the > "ordered statistics" decoder. The rest came from bpd174. With osd174 > deactivated, timer.out looks like this: > > Name Time Frac dTime dFrac Calls > ---------------------------------------------------------- > jt9 6.641 1.00 0.891 0.13 1 > read_wav 0.168 0.03 0.168 0.03 27404 > decft8 5.582 0.84 0.094 0.01 527 > sync8 3.887 0.59 3.887 0.59 527 > ft8b 1.602 0.24 0.109 0.02 2821 > bpd174 1.492 0.22 1.492 0.22 2821 > osd174 0.000 0.00 0.000 0.00 2210 > ---------------------------------------------------------- > 6.641 1.00 > > Now the average execution time for a 15 s Rx sequence is just 13 ms! > > We need to keep decoding time very short -- say, well under 1 s -- so that > auto-sequencing, if not the human operator, can select proper responses to > received messages. Fortunately, we already have good baseline performance -- > and we have a number of "knobs" to play with. > > -- Joe, K1JT > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
