Re: [Discuss-gnuradio] anyone had luck with high throughput IPC to GNU Radio?

[Kunal Kandekar]

Hi,

I am unfamiliar with Octave, so I cannot be sure about your particular
scenario, but a potential problem could be internal buffering between
writes... Maybe try flushing the stream more?

Kunal


On Fri, Jul 30, 2010 at 11:09 AM, George Nychis <address@hidden> wrote:
> Hi all,
>
> Has anyone had any luck achieving high throughput (e.g., supporting
> interpolation of 8 or 16 with USRP2) from Octave to a GNU Radio flowgraph?
> I am trying to stream a signal to my GR flowgraph, and at first I tried
> sockets but then realized it was way too slow, and so I moved to pipes but I
> am also finding it cannot keep up.
>
> I have tried writing/reading in larger blocks, such as using an fwrite() in
> Octave of size 20480, and then attempting a larger read within GNU Radio
> using a gr.file_source(20480,'/tmp/mypipe') and then converting it to a
> stream for the USRP2 with gr.vector_to_stream(gr.sizeof_gr_complex,20480).
> But alas, still no luck... I am under-running like crazy from the looks of
> my spectrum.
>
> Has anyone had any better luck?
>
> Thanks!
> George
>
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