From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 20 Sep 2002 16:59:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 20 Sep 2002 16:58:08 -0400 Received: from holomorphy.com ([66.224.33.161]:6026 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Fri, 20 Sep 2002 16:58:01 -0400 Date: Fri, 20 Sep 2002 13:56:53 -0700 From: William Lee Irwin III To: "Bond, Andrew" Cc: Dave Hansen , linux-kernel@vger.kernel.org Subject: Re: TPC-C benchmark used standard RH kernel Message-ID: <20020920205653.GM3530@holomorphy.com> Mail-Followup-To: William Lee Irwin III , "Bond, Andrew" , Dave Hansen , linux-kernel@vger.kernel.org References: <45B36A38D959B44CB032DA427A6E106402D09E43@cceexc18.americas.cpqcorp.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Description: brief message Content-Disposition: inline In-Reply-To: <45B36A38D959B44CB032DA427A6E106402D09E43@cceexc18.americas.cpqcorp.net> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 19, 2002 at 02:27:22PM -0500, Bond, Andrew wrote: > This isn't as recent as I would like, but it will give you an idea. > Top 75 from readprofile. This run was not using bigpages though. > Andy > 00000000 total 7872 0.0066 > c0105400 default_idle 1367 21.3594 > c012ea20 find_vma_prev 462 2.2212 > c0142840 create_bounce 378 1.1250 > c0142540 bounce_end_io_read 332 0.9881 > c0197740 __make_request 256 0.1290 > c012af20 zap_page_range 231 0.1739 > c012e9a0 find_vma 214 1.6719 > c012e780 avl_rebalance 160 0.4762 Looks like you're doing a lot of mmapping or faulting requiring VMA lookups, or the number of VMA's associated with a task makes the various VMA manipulations extremely expensive. Can you dump /proc/pid/maps on some of these processes? Thanks, Bill