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

[Min RK]

See https://github.com/ipython/ipython/pull/589 for a possible resolution.  It is a problem specific to 64b Windows.

-MinRK

On Jul 17, 2011, at 18:37, Ilan Schnell <ischnell at enthought.com> wrote:

> 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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>> 
>> 
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