Hi OK. well, anyway, decode 1200 (40mS) takes 12.34mS on my kit, and 19.86 using kiss-fft. I think you approximated about 14.4mS for a decode 1300 on your kit
so, I will be interested to see what you come up with using cfft My codec 2 codebase is AUGUST 2015 cheers On 18/09/2016 2:58 PM, Danilo Beuche wrote: > Hi Glen, I would not worry to much: > > - Maybe gcc 5.4 vs 4.9: difference is ~-20% (depending from which end > you are looking). It is a lot but not unexplainable. > > - Maybe it is my test data. I don't know how much jitter in the kiss_fft > algorithm is, when different data is presented. I am running > "artificially" generated audio input (digitally captured codec2 frames > from a single 750Hz sine way also generated digitally).- > > - Maybe it is my strange way of running the mcHF firmware: the mcHF > Hardware has a 16Mhz XO, but the discovery board which I have here for > testing has a 8Mhz XO. I didn't bother to reconfigure the PLL. So > everything takes twice the time. If the flash would asynchronously > coupled, which I doubt (otherwise no need for explicit wait state > settings), it would have an influence. But here I am quite sure, this > is not the case. If the caches are asynchronous: Maybe. Maybe I should > remeasure with fixed PLL setup so that the processor runs at true > 168Mhz. Will do that later and get back with updated numbers. > > Danilo > > > > > > On 18.09.2016 06:35, glen english wrote: >> Using environment Rowley CrossStudio for ARM 3.6.4 . GCC 4.9 >> >> using cycle counter (yes) >> >> interrupt overhead : (irrelevant, most likely in my setup) (asm) irqs >> only set off flags... >> >> for kissfft 5ws F4, I wonder why you have 112500 cycles and I have >> 141000. Something for me to look at . >> >> hmm >> >> -O2 but I also have a bunch of debug symbol stuff in there dunno I think >> it is only symbol data at DB2 which pushes up the image size. >> >> >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Freetel-codec2 mailing list >> Freetel-codec2@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > ------------------------------------------------------------------------------ > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
