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

[Ilan Schnell]

no 100% usage on EPD 7.1 on OSX (both 32-bit and 64-bit) using the
current master (53d497b1).  I'll test it on Windows tomorrow.

- Ilan


On Sun, Jul 17, 2011 at 6:35 PM, Satrajit Ghosh <satra at mit.edu> wrote:
> no 100% usage observed  on EPD 7.1 x64 on OSX 10.6.8 for ipython 0.11rc3
> with or without pylab.
>
> cheers,
>
> satra
>
> On Sun, Jul 17, 2011 at 2:21 PM, Fernando Perez <fperez.net at gmail.com>
> wrote:
>>
>> 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
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