From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263448AbUEWTY2 (ORCPT ); Sun, 23 May 2004 15:24:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263460AbUEWTY2 (ORCPT ); Sun, 23 May 2004 15:24:28 -0400 Received: from web90009.mail.scd.yahoo.com ([66.218.94.67]:36490 "HELO web90009.mail.scd.yahoo.com") by vger.kernel.org with SMTP id S263448AbUEWTYZ (ORCPT ); Sun, 23 May 2004 15:24:25 -0400 Message-ID: <20040523192425.87591.qmail@web90009.mail.scd.yahoo.com> Date: Sun, 23 May 2004 12:24:25 -0700 (PDT) From: Phy Prabab Subject: Slow down across kernels To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, Please cc me as I am not on this mailing list. I have an issue with the 2.6 kernels that I am unable to understand and correct. I have a custom binary that I have used to compile across different kernel versions and I am getting vildly different numbers: (as reported by time): 2.4.21-9 ~45s 2.4.22 ~55s 2.6.1 ~3m.40s 2.6.2 ~4m.00 2.6.3 ~4m.00 2.6.6 ~3m.15s 2.6.6-mm4 ~1m.30s It is most shocking how much more time is spent in user/kernel in comparsion: 2.4.21-9 5.09user 9.04system 0:43.79elapsed 32%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (7378946major+1139090minor)pagefaults 0swaps VS. 2.6.6-mm4 13.06user 23.80system 1:32.00elapsed 40%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+7537027minor)pagefaults 0swaps The system is AMD Opteron 246 w/12G RAM and broadcom Ge. To rule out network issues, I have moved the files to the local files system, ext2 on a UW320 drive. I have also tested this on a dual Xeon 3.06GHz w/8G RAM ge with very similar results in differences across the kernels. strace and make -d show no major differences. Kernels are built with gcc323/340 and bintuils 2.13.2.1. Could someone help me understand what is at issue here? Thank you and appreciate the help. Phy __________________________________ Do you Yahoo!? Yahoo! Domains – Claim yours for only $14.70/year http://smallbusiness.promotions.yahoo.com/offer