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[Discuss-gnuradio] 50Msps performance

From: Marcus D. Leech
Subject: [Discuss-gnuradio] 50Msps performance
Date: Fri, 16 Mar 2012 21:10:43 -0400
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16

I thought I'd try a simple 50Msps flow-graph with the latest Gnu Radio to see how well it now works.

I've attached it. As you can see, it doesn't do very much. A UHD source, a single multiply, then a null sink.

On a 6-core machine running at 3.2GHz, it gets overruns, nearly continuously. This isn't noticeably different from prior to the latest performance changes in Gnu Radio, except that the overruns happen at perhaps a somewhat lower rate. A single data point in a very complicated space, but I think processing very high sample rates in Gnu Radio is going to be tough. Although I know that the CASPER folks have done this in the past, as have the GMRT folks in India. But they don't use Gnu Radio, but rather highly-customized stuff that doesn't necessarily do much processing on the samples.

This was on a AMD Phenom II X6 1090T. Not the highest performance machine on the planet, but not the worst, either.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

Attachment: fiddyMhz.grc
Description: application/gnuradio-grc

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