Re: [Discuss-gnuradio] WX GUI FFT sink on Raspberry Pi

[Tom Tsou]

On Fri, Feb 7, 2014 at 9:25 PM, Wayne Roberts <address@hidden> wrote:
> Seems more viable to run it on a more modern cpu, such as
> http://www.rtl-sdr.com/demonstrating-gqrx-running-beaglebone-black-rtl-sdr/

I would not completely discount performance of the Raspberry Pi -
notably floating point performance against the Cortex-A8. In many
cases, the performance gap is probably smaller than a change of
architecture generations would normally dictate. The Raspberry Pi has
a full VFP implementation versus the more or less crippled
non-pipelined VFPLite version on the A8. It's true that the A8 does
have a NEON unit, which is extremely capable, but that chunk of
silicon won't see full use without explicitly written instructions.

Regarding the original question, is the CPU choking? Perf results
would be telling, but numbers from top are better than nothing.

  -TT