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From: | John Ackermann N8UR |
Subject: | [Discuss-gnuradio] "D" errors after flowgraph runs for some time |
Date: | Sat, 08 Aug 2015 14:56:56 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
The program runs just fine for the first 20-30 minutes on my I7-4710HQ laptop. System monitor shows typically one core running at about 50% with the others ranging from idling to 30%. Only a fraction of system memory is used. The laptop is wired to a USRP2/WBX via GigE switch, and is showing about 5MIB/s of incoming data when the flowgraph is running.
But after 20-30 minutes I start to get a string of "D"s on the console, and while the program keeps decoding audio, the signal strength drops by 40dB or more.
When I first started playing with Chris' example, I also had a string of "D"s immediately upon startup which I cured by turning on realtime scheduling. It appears that just moved the problem off into the future.
I am guessing this is some sort of buffer exhaustion or similar problem. Any suggestions on how to address is?
Thanks, John
noaa_demo.grc
Description: application/gnuradio-grc
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