In my experience VOLK runs about 10% faster on Raspberry Pi 4 with -ffast-math, depending on the flowgraph you might get more. Three kernels had some minor problems with precision, but I think they can be fixed so all will pass... The fun thing about these embedded platforms is that the possibilities for optimizations are almost endless!
On a side note, which fork of dump1090 should I run? There seems to be so many! --Albin On Tue, Sep 3, 2019 at 6:18 PM Chris Kuethe <chris.kue...@gmail.com> wrote: > > Yep, on some processors with some workloads it really makes a huge > difference. As others have commented, there may be significant trade-offs > with regard to numerical behaviro. > > Some of my observations: > dump1090 loses accuracy below the 7th digit when calculating precision, but > consumes 10% less power on the device under test > rtl_433 runs about 35% faster > and acarsdec runs over 400% faster. > > > On Sun, Sep 1, 2019, 07:11 Albin Stigö <albin.st...@gmail.com> wrote: >> >> Anyone has experience with the real world impact of using gcc -ffast-math >> with SDR in general, and GNURadio/Volk in particular? >> >> >> --Albin SM6WJM >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
