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: Fri, 22 Nov 2002 17:26:56 -0500 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: pipe performance problem Message-ID: <20021122222656.GA11995@redhat.com> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <777770015.20021122040845@huno.net> <007301c291ff$eb9ce050$78d96f83@pomello> <21545718.20021122114035@huno.net> <12415481703.20021122220059@huno.net> <20021122210856.GA10679@redhat.com> <19719277625.20021122230415@huno.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <19719277625.20021122230415@huno.net> User-Agent: Mutt/1.5.1i On Fri, Nov 22, 2002 at 11:04:15PM +0100, thomas wrote: >Christopher Faylor wrote: >>If the relevant code was obvious then it would be trivial to fix. I'm >>not even convinced that there is a cygwin problem here. It doesn't >>appear to be doing anything wrong. However, unless you are doing >>something with ttys I don't see why that's appropriate. > >from a quick look i found /dev/piper and things like that in tty.cc and >since thats what the strace logs are also showing i thought tty.cc is >relevant. I was trying to help by cutting down on places to look. If you want to investigate tty code, feel free. >now please correct me if i'm wrong, but when it works with 1.1.18 and >not with 1.3.x and the only constant that changes is cygwin, wouldn't >every fan of logic scream out loud then: it's cygwin! :) Logic fan, are you? Did you see anything in the strace log that indicated cygwin was operating improperly? "It's slower" is not necessarily a sign of improper behavior. There are often reasons for decreasing performance, such as "improving compliance". If a program is so finely tuned that it falls over when timings change then it is possible that it is just not going to work. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/