I suspect a lot of the graphics could run perfectly fine if they took advantage of the gpu better. A lot of the current rendering in GNURadio (and GQRX) is very cpu bound.
I had a spectrum and waterfall running easily at 60fps on a pi3 by using opengl properly. Using vulkan on pi4 the sky is the limit. --Albin On Thu, Dec 17, 2020, 13:18 Marcus Müller <muel...@kit.edu> wrote: > Can't stress this enough. Running a 32 bit Linux on a RPi 4 would be > like running Windows 98 on a modern PC and expecting top performance > from the CPU. You're not making use of the CPU you have, you're only > making use of a legacy mode that it still supports. > > Best regards, > Marcus > > On 17.12.20 10:53, Albin Stigö wrote: > > 64bit mode is most likely better because in addition to being 64bit it > > enables additional cpu features (certain new instructions and more SIMD > > NEON registers) > > > > On Thu, Dec 17, 2020, 10:36 jean-michel.fri...@femto-st.fr > > <mailto:jean-michel.fri...@femto-st.fr> <jean-michel.fri...@femto-st.fr > > <mailto:jean-michel.fri...@femto-st.fr>> wrote: > > > > The benchmark on volk/64 bit kernel v.s 32 bit Raspbian is at > > https://pubs.gnuradio.org/index.php/grcon/article/view/73/55 > > <https://pubs.gnuradio.org/index.php/grcon/article/view/73/55> > > last page. I get 3 to 7-fold improvement by volk_config on a > dedicated > > toolchain for 64-bit CPU. > > > > JM > > > > -- > > JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 > > Besancon, France > > > > December 17, 2020 10:28 AM, "Kristoff" <krist...@skypro.be > > <mailto:krist...@skypro.be>> wrote: > > > > > HI all, > > > > > > I also have a RPi4 (*). > > > Some follow-up question. > > > > > > What OS would be the best for this? > > > Would running 64 bit make a difference? > > > > > > I don't know to what degree this is related, but I did a test > running > > > WebGL (**) on that pi, and I got about 1/3 of the frames per > > second on > > > my RPi4 compared to my laptop (which only has a UHD Graphics 630 > > Mobile, > > > so not the best or latest neither) > > > Is the GPU in the Pi4 good enough to run many GUI elements in GNU > > Radio > > > at the same time? > > > > > > Kr. > > > > > > (*) RPi4B 8 GB, 120 SSD > > > > > > (*) https://webglsamples.org <https://webglsamples.org> > > > > > > On 16/12/2020 11:10 p.m., Dan Romanchik KB6NU 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 < > http://www.kb6nu.com> > > > >
