X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Tue, 10 Jan 2012 17:28:09 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: socket performance (was Re: Building cygwin1.dll)
Message-ID: <20120110162809.GH2292@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <95814509-4E08-44C6-8E59-026225EC0FF5 AT playsafesa DOT com> <4F04613B DOT 6050505 AT gmail DOT com> <B6F87B4D-C088-49BF-B52C-3D0168EAC78D AT playsafesa DOT com> <20120109134311 DOT GH15470 AT calimero DOT vinschen DOT de> <DDBC23AA-2E2B-4DF2-9783-7611AB80C1C8 AT playsafesa DOT com> <20120110144556 DOT GG2292 AT calimero DOT vinschen DOT de> <23A68B159C764FB2B048DAD0F256B935 AT multiplay DOT co DOT uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <23A68B159C764FB2B048DAD0F256B935@multiplay.co.uk>
User-Agent: Mutt/1.5.21 (2010-09-15)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Jan 10 15:24, Steven Hartland wrote:
> If your running Windows 7 or 2k8 are you running the following hotfix, if not
> you should try that too, just in case you machine has got a degraded tcp
> stack.
> 
> http://support.microsoft.com/kb/983528

I tried that, but it doesn't install.  The installer tells me "The
update is not applicable to your computer."  This is W7 64 bit on a
Lenovo laptop.

What's also puzzeling is this.  I tried this on three virtual machines
as well, W7 32, W7 64, 2008R2 64.  In all three VMs scp was almost just
as fast as sftp, about 13 MB/s. 

So why is scp (and rsync, too, btw) half as fast on the real HW as on
the VMs while sftp is three times faster?!?  That doesn't make sense.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

--
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