Re: [Discuss-gnuradio] Testing an GRC project runs nearly 200% CPU

[Marcus Müller]

Hello Andreas,

you never need a throttle block when you have hardware that
limits/defines your real-world sampling rate; in your case, it's your RF
hardware and your sound card.
Aside from things like implicit resampling in the audio card driver
infrastructure, it's absolutely possible that your bananapi is simply
not performant enough to do GUI, signal processing and audio playback at
once.
The question is: Does the same application work sufficiently well on a
fast PC? Do you see any over- or underrun warnings on your console?

Greetings,
Marcus

On 01/15/2015 10:38 PM, Andreas Ladanyi wrote:
> Hi,
>
> iam testing an UKW Radio Receiver GRC project (gr-rds) on bananapi.
> The application starts. The tuned radio station sounds clicking.
> Changing any parameter in the GUI is very difficult/slow.
>
> top tells me a memory usage about 20 %. CPU usage is nearly 200 %
> (bananapi has 2 CPUs). At any webside i read that working with no
> throttle blocks could run a CPU to maximum. In my project which iam
> testing i see no throttle blocks. I am not sure if that could be the
> reason because iam working on the bananapis real hardware ?
>
> Is there something wrong with the sample rate ?
>
> Andreas
>
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