X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-0.7 required=5.0 tests=BAYES_20 X-Spam-Check-By: sourceware.org Date: Sat, 23 Jan 2010 11:19:36 -0600 From: David Morgan To: cygwin@cygwin.com Cc: mlm@aechelon.com Subject: Cygwin slow on x64 systems Message-ID: <20100123171936.GE23796@err> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) 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 Hello all, We use cygwin for our build environment, and have observed that everything runs extremely slow on x64 systems, for versions newer than approximately 1.5.12 (including 1.7.1). When I run the following command in BASH, while true; do date >> file; done on a 1.5.12 Core II system, I get approximately 100 dates per second. On a 1.7.1 Nehalem system, I get approximately 15, and it takes several seconds for Ctrl-C to take effect, whereas it's instantaneous on 1.5.12. It makes no difference whether I redirect the output or not. We have found that the problem was introduced somewhere between 1.5.12 and 1.5.24-2. We have not seen any such slowdown on x86 systems. We have observed this on XP x64, Server 2003 R2 x64, and now (with 1.7.1 only) on Windows 7 x64. Can anyone recommend how we could profile this to help isolate the problem? We have vTune and Quantify in-house. Regards, David -- 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