Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Sun, 29 May 2005 16:14:31 -0400 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: Serious performance problems (new snapshot has some performance improvement) Message-ID: <20050529201431.GB28340@trixie.casa.cgf.cx> Reply-To: cygwin@cygwin.com References: <000b01c563c7$f4456f00$976d65da@DANNY> <4298F195.9090600@familiehaase.de> <20050529000152.GE3094@trixie.casa.cgf.cx> <20050529001846.GG3094@trixie.casa.cgf.cx> <20050529030523.GA10263@trixie.casa.cgf.cx> <20050529171324.GA26603@trixie.casa.cgf.cx> <429A19EC.9080905@familiehaase.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <429A19EC.9080905@familiehaase.de> User-Agent: Mutt/1.5.8i On Sun, May 29, 2005 at 09:37:16PM +0200, Gerrit P. Haase wrote: >Christopher Faylor wrote: > >>On Sat, May 28, 2005 at 11:05:23PM -0400, Christopher Faylor wrote: >> >>>On Sat, May 28, 2005 at 08:18:46PM -0400, Christopher Faylor wrote: >>> >>>>I have an idea about how to work around this problem but I have to think >>>>about how dangerous it might be. Basically removing the signal handling >>>>wrapper around pthread_getspecific and pthread_setspecific. That may >>>>work ok but I have to think about worst case scenarios. >>> >>>I've semi-convinced myself that pthread_[gs]etspecific do not need signal >>>protection so I've released a snapshot which turns it off: >>> >>>http://cygwin.com/snapshots/ >>> >>>This version is about 2.7 times faster than cygwin 1.5.17 but it is still >>>not as fast as mingw. I don't think we're going to hit mingw performance >>>since there are still cygwin overhead issues involved. >>> >>>AFAIK, this is only going to provide a speedup for this specific case. >>>I don't think a general cygwin user is going to notice any improvement. >> >>Gerrit, if you have a chance could you confirm or deny if this change has >>any effect for you? > >I just changed the DLL, application is not recompiled: > >Snapshot DLL: > >$ C:\cygwin\bin\time cygspd.exe cygspd.dat >94.04user 0.61system 1:41.69elapsed 93%CPU > (0avgtext+0avgdata 10560maxresident)k >0inputs+0outputs (667major+0minor)pagefaults 0swaps > >Release 1.5.17 DLL: > >$ C:\cygwin\bin\time cygspd.exe cygspd.dat >264.50user 0.75system 4:48.08elapsed 92%CPU > (0avgtext+0avgdata 10560maxresident)k >0inputs+0outputs (667major+0minor)pagefaults 0swaps > >It is about 2,8514851485148514851485148514851 times faster at my >workstation. Cool. Thanks for checking this. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/