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List:       pykde
Subject:    [PyQt] PyQt5 application hanging inexplicably
From:       James Ross-Smith <jars121 () gmail ! com>
Date:       2017-08-10 22:14:50
Message-ID: CAFH0v3bB+QJfVn4QMk+JUMCvdHH074HoSjcM05g-EWeEV8tiDg () mail ! gmail ! com
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Good morning all,

My PyQt5 application (Qt 5.9.0 with Python 3.6.2) is running quite nicely
on my embedded device (Raspberry Pi 2), but hangs inexplicably after a
seemingly random period of time (sometimes 15 minutes, sometimes 2+ hours).
I.e. all GUI elements are updating and responsive and then the entire
window pauses (all GUI elements stop changing). When running the
application via SSH on my development machine, I can 'Ctrl C' out of the
Python interpreter normally, so it doesn't appear that the application
itself has frozen.

I replaced some of my QLabel elements with CPU, memory and thread metrics
to monitor if I had runaway threads, or I was consuming all the available
RAM. As it turns out, memory allocation was stable at 16%
(psutil.virtual_memory()), CPU utilisation was stable at ~35%
(psutil.cpu_percent()) and the number of threads was constant at 2
(threading.active_count()).

What else could I be missing here?

Cheers,

Jamie

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<div dir="ltr">Good morning all,<div><br></div><div>My PyQt5 application (Qt 5.9.0 \
with Python 3.6.2) is running quite nicely on my embedded device (Raspberry Pi 2), \
but hangs inexplicably after a seemingly random period of time (sometimes 15 minutes, \
sometimes 2+ hours). I.e. all GUI elements are updating and responsive and then the \
entire window pauses (all GUI elements stop changing). When running the application \
via SSH on my development machine, I can &#39;Ctrl C&#39; out of the Python \
interpreter normally, so it doesn&#39;t appear that the application itself has \
frozen.</div><div><br></div><div>I replaced some of my QLabel elements with CPU, \
memory and thread metrics to monitor if I had runaway threads, or I was consuming all \
the available RAM. As it turns out, memory allocation was stable at 16% \
(psutil.virtual_memory()), CPU utilisation was stable at ~35% (psutil.cpu_percent()) \
and the number of threads was constant at 2 \
(threading.active_count()).</div><div><br></div><div>What else could I be missing \
here?</div><div><br></div><div>Cheers,</div><div><br></div><div>Jamie</div></div>


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