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Re: [Discuss-gnuradio] Mysterious rapid-capture bug
From: |
Marcus Leech |
Subject: |
Re: [Discuss-gnuradio] Mysterious rapid-capture bug |
Date: |
Wed, 28 Nov 2007 17:35:26 -0500 |
User-agent: |
Thunderbird 2.0.0.9 (X11/20071115) |
John Bratteli wrote:
> I brought this up some time ago, but no one was able
> to help me. I have a little more information now, so
> maybe we can make progress.
>
> In the application we are working on, we would like to
> perform continuous split-second captures from the USRP
> over days at a time. Unfortunately, it hangs after an
> indeterminate amount of time. The power of the
> computer running the program seems to have some
> bearing on the time before crash, but it is still
> pretty random. We have run times from 2min to 23hrs.
>
>
> I wrote a simple script to reproduce the bug. All it
> does is record from the USRP to a vector for .1 sec,
> then throws the vector away. Tracing the problem, I
> find that top_block.run() calls
> top_block_run_unlocked(*args), which calls
> _gnuradio_swig_py_runtime.top_block_run_unlocked(*args),
> which never returns. I haven't traced it any farther
> as that last appears to be a compiled C++ library, and
> I wouldn't know where the source is.
>
> Any help in relieving my ignorance would be
> appreciated.
>
> Thanks,
> John Bratteli
> Texas A&M-Commerce
>
>
Just FYI, my Radio Astronomy stuff runs for *weeks* at a time at my
place, continuously capturing gigabytes of spectral and
total-power data, and it never hangs. Unless I muck with the hardware
at the dish with the receiver turned on. Then the
hardware sometimes gets upset, but I regularly have this stuff running
for looong periods of time without incident.
That probably doesn't help, other than to know that it's *possible* to
do stuff with the USRP for weeks at a time without
any noticeable problems...
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