X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-1.0 required=5.0 tests=AWL,BAYES_05,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,KAM_TIME,KHOP_RCVD_TRUST,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_YE X-Spam-Check-By: sourceware.org MIME-Version: 1.0 Date: Thu, 9 Aug 2012 22:29:38 +1000 Message-ID: Subject: Re: App runs 8x slower on dual core machine (with test case to replicate issue) From: Zach Saw To: cygwin AT cygwin DOT com Content-Type: text/plain; charset=ISO-8859-1 Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Unfortunately, I'm not paid to minimize test cases for Cygwin. It already took me quite some time to create the test case to demonstrate a multicore issue in Cygwin. And Boost 1.48.0 that I used is officially released as part of Cygwin (i.e. Cygwin patched - which is different from official Boost). Another finding - When under WOW64 (Win7-64-bit), the test case fails (i.e. runs slow) regardless of CPU affinity. I already found that I could set CPU affinity to fix the issue, so I'm good. -- 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