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 X-Authentication-Warning: sophia.inria.fr: Host danaos.inria.fr [138.96.66.30] claimed to be sophia.inria.fr Message-ID: <3DB820C3.9C7AFA4D@sophia.inria.fr> Date: Thu, 24 Oct 2002 18:33:07 +0200 From: David Geldreich Organization: INRIA Sophia Antipolis X-Accept-Language: fr-FR, en MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Assymetric network performance on cygwin Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hi all, my previous RPC bandwidth problem is in fact a tcp performance problem under cygwin. I have compiled ttcp (from http://programming.ccp14.ac.uk/ftp-mirror/programming/cygwin/pub/cygwin/release/ttcp/) under cygwin And I get the following bandwidth (I am on a 100Mbit switched network) !!! cygwin (ttcp -r -s -fm) <- linux (ttcp -t -s -fm) : 20Mbit linux (ttcp -r -s -fm) <- cygwin (ttcp -t -s -fm) : 64Mbit With native winsocket wsttcp (http://www.winsite.com/bin/Info?5896 -- 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/