X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-2.4 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Message-ID: <4A4A3B64.4030004@etr-usa.com> Date: Tue, 30 Jun 2009 10:20:52 -0600 From: Warren Young User-Agent: Thunderbird 2.0.0.22 (Windows/20090605) MIME-Version: 1.0 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) References: <20090625101039.GP7289@calimero.vinschen.de> <20090625140508.GA17040@ednor.casa.cgf.cx> <20090625143651.GR7289@calimero.vinschen.de> <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> In-Reply-To: <20090630112617.GS30864@calimero.vinschen.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: 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 Corinna Vinschen wrote: > What's still not clear is why the ssh process takes so much CPU. Too many buffer copies? It takes a surprising amount of CPU power to fill a gigabit pipe from userland. Double or triple that workload with unnecessary copies, and there goes your transfer rate, evaporating on the wind. -- 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