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Re: [Discuss-gnuradio] User experience with E1x0 boards

From: Alexander Chemeris
Subject: Re: [Discuss-gnuradio] User experience with E1x0 boards
Date: Wed, 4 May 2011 10:03:54 +0400

On Wed, May 4, 2011 at 02:33, Josh Blum <address@hidden> wrote:
>> 4) Be sure to tell UHD you want integer samples. I'm thinking even then
>> UHD has to swap IQ for historical reasons. (Josh, help?)
> There is a copy-conversion operation between kernel buffer memory and
> user memory. If the user requests complex shorts, I believe the
> conversion is the equivalent of a 16 bit integer pair swapping. This
> routine could be replaced with NEON intrinsics pretty easily.

Ugh. Could you please point us to this code so we can disable it? We
don't need to convert data in real-time, and if we can avoid copying
it would be great help too. We need to capture raw data to RAM with
maximum possible throughput and then process it in offline mode.

Alexander Chemeris.

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