X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-2.1 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Date: Wed, 1 Jul 2009 09:40:33 -0500 From: Brian Ford Reply-To: cygwin@cygwin.com To: cygwin@cygwin.com Subject: Re: Call for TESTING (was Re: [1.7.0-50] scp progress counter flies through first 175 MB or so) In-Reply-To: <20090701092617.GU30864@calimero.vinschen.de> Message-ID: References: <20090625145005.GB18338@ednor.casa.cgf.cx> <20090628193155.GA10407@ednor.casa.cgf.cx> <20090629092857.GZ30864@calimero.vinschen.de> <20090629095322.GD30864@calimero.vinschen.de> <20090629142348.GB19123@ednor.casa.cgf.cx> <20090629144030.GC19123@ednor.casa.cgf.cx> <4A490F0E.6040806@etr-usa.com> <20090630112617.GS30864@calimero.vinschen.de> <4A4A3B64.4030004@etr-usa.com> <20090701092617.GU30864@calimero.vinschen.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: 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 On Wed, 1 Jul 2009, Corinna Vinschen wrote: > On Jun 30 14:23, Brian Ford wrote: > > Even more so for context switches ;-): > > > > http://www.cygwin.com/ml/cygwin-developers/2007-10/msg00040.html > > > > although this performance penalty was removed from read/write and friends: > > > > http://www.cygwin.com/ml/cygwin-developers/2007-12/msg00004.html > > > > it is still present for send/recv and friends. > > I removed the sig_dispatch_pending calls from send/recv and friends. Thank you! This should have removed the thread handshake overhead from most all I/O calls now. I just wish we could figure out a way to avoid it everywhere unless it is actually necessary. I know, PTC :-). > Note, however, that this has no influence on the ssh/scp results we were > talking about in this thread. ssh/scp are using read/write calls. Sorry, I should have investigated and bench marked the difference. -- Brian Ford Staff Realtime Software Engineer VITAL - Visual Simulation Systems FlightSafety International the best safety device in any aircraft is a well-trained crew... -- 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