From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20916 invoked by alias); 12 Jun 2012 13:02:51 -0000 Received: (qmail 20903 invoked by uid 22791); 12 Jun 2012 13:02:50 -0000 X-SWARE-Spam-Status: No, hits=-2.0 required=5.0 tests=AWL,BAYES_00,KHOP_THREADED,SPF_NEUTRAL,TW_CG,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from soapstone1.mail.cornell.edu (HELO soapstone1.mail.cornell.edu) (128.253.83.143) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 12 Jun 2012 13:02:37 +0000 Received: from authusersmtp.mail.cornell.edu (granite2.mail.cornell.edu [128.253.83.142]) by soapstone1.mail.cornell.edu (8.14.4/8.14.4) with ESMTP id q5CD2aLx029799 for ; Tue, 12 Jun 2012 09:02:36 -0400 (EDT) Received: from [192.168.1.4] (cpe-67-249-194-47.twcny.res.rr.com [67.249.194.47]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id q5CD2YfQ007452 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 12 Jun 2012 09:02:35 -0400 (EDT) Message-ID: <4FD73DE7.4030606@cornell.edu> Date: Tue, 12 Jun 2012 13:02:00 -0000 From: Ken Brown User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: Performance problems with emacs-X11 in current cygwin References: <4FC7D9E6.5050609@alice.it> <4FCA1FF0.8090703@alice.it> <4FCA2CA9.7080704@cornell.edu> <4FCA634D.1080206@cornell.edu> <4FCB2991.3010701@users.sourceforge.net> <4FCB5438.7080903@cornell.edu> <4FCB9872.5010506@cornell.edu> <4FD1F709.4050107@cornell.edu> <87k3zhbyyk.fsf@Rainer.invalid> <4FD22C39.6070107@cornell.edu> <4FD53FA9.2040105@cornell.edu> <4FD55DF1.7030102@users.sourceforge.net> <4FD5D8F2.6060300@cornell.edu> <4FD60A82.5060808@cornell.edu> In-Reply-To: <4FD60A82.5060808@cornell.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-CORNELL-SPAM-CHECKED: Pawpaw X-Original-Sender: kbrown@cornell.edu - Tue Jun 12 09:02:35 2012 X-PMX-CORNELL-REASON: CU_White_List_Override X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com X-SW-Source: 2012-06/txt/msg00230.txt.bz2 On 6/11/2012 11:10 AM, Ken Brown wrote: > On 6/11/2012 7:39 AM, Ken Brown wrote: >> 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 >>>> 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? > > BTW, there's no easy way to revert the problematic commit, in view of > this commit, which came on the next day: > > http://git.gnome.org/browse/glib/commit/?h=glib-2-32&id=1c8c408c51c85230356cc95c06f2e1bd3f376624 > > > The commentary that goes with that commit gives some explanations of > what's supposed to happen. It doesn't mean much to me, because of my > ignorance of how glib works. But maybe it will give you an idea where to > look. One further data point: I tried the 2012-01-11 cygwin snapshot, and the problem is still there. So if it's a Cygwin bug, it isn't one that was introduced in the last 5 months. Ken -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple