And remember to run volk_profile On Thu, Dec 17, 2020, 08:03 Albin Stigö <albin.st...@gmail.com> wrote:
> Dan, > > I can't comment on your particular flowgraph but I can tell you that you > will get a significant speed-up if you build volk and GNURadio from source > (and maybe fftw) as this enables all sorts off optimizations not in the ppa > for compatability reasons. > > If you decide to go down this route I recommend you keep your root > filesystem on an ssd attached via usb3 and increase your swap file size to > max. > > Albin SM6WJM > > On Wed, Dec 16, 2020, 23:40 Dan Romanchik KB6NU <cwg...@kb6nu.com> wrote: > >> Has anyone successfully run GNU Radio on a Pi 4? I recently purchased an >> RTL-SDR dongle and thought it would be fun to experiment a little with GNU >> Radio and learn something about SDR. >> >> A couple of days ago, I fired up GNU Radio, and after having some trouble >> figuring out how to get the audio sink to talk to the Pi, I downloaded >> VE6EY's FM receiver flow graph. The flow graph runs, but the Pi 4 just >> doesn't seem to have enough horsepower to run it in real time. The audio is >> slow and distorted. >> >> Thinking that it might be the WX widgets slowing down the program, I >> first deleted the FFT display widgets, then converted the WX slider >> controls to QT range controls. Neither had any effect on how well the flow >> graph ran. >> >> GQRX and CubicSDDR seem to work just fine. At least with both of them, >> I'm able to receive FM broadcast and NOAA weather station. But, maybe the >> PI4 just doesn't have enough horsepower to run GNU Radio? If so, that's >> kind of disappointing. >> >> 73! <—ham radio lingo for “best regards" >> >> *Dan KB6NU* >> CW Geek, Ham Radio Instructor >> Author of the "No Nonsense" amateur radio license study guides >> Read my ham radio blog at http://www.kb6nu.com >> >
