[IPython-dev] Fwd: [ipython] ipython-qtconsole uses 100% CPU (#588)

[Fernando Perez]

Hi all,

this looks fairly serious, and we're trying to wrap up the 0.11
release so that we're not eternally promising 'one more week' forever.
 But hogging a cpu at 100% utilization is a real problem. Can anyone
else confirm this?  And does anyone have ideas as to what could be the
cause?

Thanks,

f


---------- Forwarded message ----------
From: rgaudette
<reply+i-1238118-7704c01a6c981882533d9b8effb70f2d4b39aadd at reply.github.com>
Date: Sun, Jul 17, 2011 at 10:34 AM
Subject: [ipython] ipython-qtconsole uses 100% CPU (#588)
To: fperez.net at gmail.com


Hi,
When I run ipython-qtconsole.exe, I observe 100% CPU usage (really 50%
on my dual core machine) when nothing is running in the console.  My
machine consists of the following configuration:
Windows 7 64 bit
Python 2.7.2 64 bit binary install (from python.org)
PyQT and QT from Christoph Gohlke 's binary distribution
PyQt-Py2.7-x64-gpl-4.8.4-1.exe

I first observed this behavior on Christoph Gohlke 's
ipython-0.11.dev.win-amd64-py2.7.exe.  I then uninstalled that package
and pull the latest IPython from github.  The latest version still
exhibits the 100% CPU usage behavior on my machine.

Some other observations that might be helpful:

* If I close the QT console window but leave the kernel running
(selecting "No, just this console button"), the CPU usage stays at
100%.

* The windows console based ipython.exe does not have this behavior on
my machine.

* Task manager shows that it is pythonw.exe using the CPU

--
Reply to this email directly or view it on GitHub:
https://github.com/ipython/ipython/issues/588