Re: [Discuss-gnuradio] Raspberry Pi Activity?

[mleech]

On 17 Jan 2013 11:20, Ed Criscuolo wrote:

> On 1/17/13 10:35 AM, Philip Balister wrote:
> > On 01/17/2013 08:57 AM, Ed Criscuolo wrote:
> > > Has anyone been using Gnu Radio on a Raspberry Pi lately? (just got one for Xmas :) ) Any special build procedures for 3.6.3?
> > Please remember the R-pi is an armv6 based processor with a vfp unit (not a NEON SIMD unit). Do not expect much signal processing performance from this. Armv7 + NEON is much better. Philip
> I thought it has an Arm11!  From Wikipedia:
>
> "The Raspberry Pi has a Broadcom BCM2835 system on a chip (SoC),[3] 
> which includes an ARM1176JZF-S 700 MHz processor.... VideoCore IV 
> GPU,[12] and originally shipped with 256 megabytes of RAM, later 
> upgraded to 512MB."
>
> Wikipedia also states:
>
> "ARM11 is an ARM architecture 32-bit RISC microprocessor family which 
> introduced the ARMv6 architectural additions. These include SIMD media 
> instructions, multiprocessor support and a new cache architecture."
>
> These would seem to imply that the R-Pi has SIMD instructions available.
>
> In addition, the VideoCore IV GPU looks like it's a pretty capable
> DSP in it's own, capable of running it's own applications without the
> CPU.  Sounds like Volk could take advantage of it as well.
>
>
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

What I've heard, is that the GPU isn't, in any reasonable sense, "open".  Which means that it can only really be used as the video codec, and not the GP-GPU you'd really like.