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[Discuss-gnuradio] Unresponsive GUI behavior and system instability with
From: |
Elvis Dowson |
Subject: |
[Discuss-gnuradio] Unresponsive GUI behavior and system instability with USRP2 + WBX module |
Date: |
Fri, 16 Jul 2010 11:53:44 +0400 |
Hi,
I noticed that the GNU radio's GUI for a simple FM receiver can become
un-responsive. For example, when trying to run the WFM receiver example, the
Frequency Slider moves, but the frequency of the station doesn't change. There
is a Failed message at the bottom left corner of the GUI.
At times, when it launches, it works fine and doesn't show the audio buffer
under-run messages, but if I stop and relaunch the same application, I suddenly
get a whole bunch of audio buffer under-runs.
Is GNU Radio stable enough? Or are these type of issues common in the current
release, and needs to be fixed?
For example, I notice that if some internal blocks or computations don't
correctly align, like if I have a audio input rate of 32051, the system doesn't
launch, but if I set the audio input rate to 32050, the WFM receiver launches
(refer to my earlier thread, where I still haven't got the rational resampler
way of getting the FM receiver to work). See the following thread for the
example patch to reproduce this behavior
http://old.nabble.com/USRP2-%2B-WBX%3A-Unable-to-receive-FM-signals-td29176138.html
I'm assuming that the FM receiver example is simple enough. But if the system
gets bogged down like this with a simple application, what about more complex
applications like a WiFi transceiver, or HDTV transmitter/receiver applications?
Is this a general behavior that everyone else sees, i.e. GNU Radio being
unstable and un-responsive at times?
I have 8 virtual CPU cores allocated to my Linux VMware image, and a dedicated
ethernet port connected to the USRP2. CPU utilization is still restricted to 2
CPUs and the load is between 20 to 30 percent for when running the FM receiver
application. The host computer is a iMac quad-core i7 processor at 2.8 GHz.
I've allocated 2.5GB RAM to the linux virtual machine.
I would like to know if the system instability and un-responsiveness is
something specific to my system configuration or if it is related to GNU Radio
or the USRP2 or the particular firmware that I'm using (txrx_wbx).
Elvis Dowson
- [Discuss-gnuradio] Unresponsive GUI behavior and system instability with USRP2 + WBX module,
Elvis Dowson <=