> Eliminating as much of the copy in/out WRT the kernel cannot but > help, especially when you're doing SDR decoding near the radios > using low-powered compute hardware (think Pies and the like).
Does this include demodulation on the pi? cause even when i dumped the pi i was given for that purpose (with a <2Mbit I/Q stream) and replaced it with some similar ARM platform that at least had neon cpu instruction extensions for faster floating point operations, I was barely able to run a small FFT. My conclusion was that these low-powered ARM systems are just good enough for gathering low-bandwidth, non-critical USB traffic, like those raw I/Q samples from a dongle, but unfit for anything else.
