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Date: Mon, 11 Jun 2012 07:39:30 -0400
From: Ken Brown <kbrown AT cornell DOT edu>
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To: cygwin AT cygwin DOT com
Subject: Re: Performance problems with emacs-X11 in current cygwin
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On 6/10/2012 10:54 PM, Yaakov (Cygwin/X) wrote:
> On 2012-06-10 19:45, Ken Brown wrote:
>> The bisection shows that the first problematic commit is this one:
>>
>> http://git.gnome.org/browse/glib/commit/?h=glib-2-32&id=7eae486179e2799c369ed9ffcea663bf9161ce79
>>
>>
>>
>> Author: Ryan Lortie <desrt AT desrt DOT ca>
>> Date: Wed Aug 31 22:07:02 2011 -0400
>>
>> GMain: simplify logic for g_wakeup_acknowledge()
>>
>> Instead of messing around with context->poll_waiting, just look at the
>> GPollFD to see if the GWakeup needs to be acknowledged.
>>
>> In case anyone else wants to confirm this, you can get my glib builds by
>> running
>>
>> setup.exe -K http://sanibeltranquility.com/cygwin/kbrown.gpg
>>
>> and adding http://sanibeltranquility.com/cygwin to the list of mirrors.
>> The problematic version is
>>
>> libglib2.0_0-2.30.90_7eae4861-1
>>
>> and the preceding version (without the problem) is
>>
>> libglib2.0_0-2.30.90_87880df-1
>>
>> I've tested the latter with emacs-23, emacs-24, and gvim.
>
> Thanks for doing this. Is this still only a problem with XP? If so, it
> is most likely a bug in Cygwin itself.

It's a problem with XP but not with Windows 7.  No one has reported 
testing other systems.

Do you understand the code well enough to make a test case to help cgf 
and Corinna debug it, assuming it's a Cygwin bug?

Ken


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