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Re: [Discuss-gnuradio] Segfault

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Segfault
Date: Wed, 14 Mar 2012 19:38:19 -0400
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On Wed, Mar 14, 2012 at 10:42 AM, Stefan Ott <address@hidden> wrote:
Hey list

I managed to build gnuradio 3.5.1 and (almost) got it working on the
USRP E110. However, when I try to run uhd_rx_cfile.py (with
--samp-rate 10e6 -f 97.7e6) it segfaults. You will find the log below.

So there is essentially no chance the E110 can record to Flash at 10Msps. It probably won't sustain flash writes at 500ksps. Try a lower sample rate, or a small number of samples written to a tmpfs instead.

Tangential and not directly relevant, but I was testing an embedded ARM system on Tuesday specifically for SDcard write performance, and on
  a Class-10 SDcard was able to sustain 40Mbyte/second on a 32Mbyte "sprint"--for 100 iterations.  That's unrelated to USRP performance,
  but at least on ARM hardware writing to "decent" SD cards, you can get pretty-good performance.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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