From owner-freebsd-embedded@FreeBSD.ORG Sat Jun 21 14:03:02 2014 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 03F17E69; Sat, 21 Jun 2014 14:03:02 +0000 (UTC) Received: from h2.funkthat.com (gate2.funkthat.com [208.87.223.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "funkthat.com", Issuer "funkthat.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id CEB9F2559; Sat, 21 Jun 2014 14:03:01 +0000 (UTC) Received: from h2.funkthat.com (localhost [127.0.0.1]) by h2.funkthat.com (8.14.3/8.14.3) with ESMTP id s5LE30gk098315 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 21 Jun 2014 07:03:00 -0700 (PDT) (envelope-from jmg@h2.funkthat.com) Received: (from jmg@localhost) by h2.funkthat.com (8.14.3/8.14.3/Submit) id s5LE30CV098314; Sat, 21 Jun 2014 07:03:00 -0700 (PDT) (envelope-from jmg) Date: Sat, 21 Jun 2014 07:03:00 -0700 From: John-Mark Gurney To: Magnus Nilsson Subject: Re: Strange slowdown of zlib. Message-ID: <20140621140300.GO31367@funkthat.com> Mail-Followup-To: Magnus Nilsson , Ian Lepore , freebsd-arm , freebsd-embedded@freebsd.org References: <1403193531.20883.269.camel@revolution.hippie.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Operating-System: FreeBSD 7.2-RELEASE i386 X-PGP-Fingerprint: 54BA 873B 6515 3F10 9E88 9322 9CB1 8F74 6D3F A396 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html X-TipJar: bitcoin:13Qmb6AeTgQecazTWph4XasEsP7nGRbAPE X-to-the-FBI-CIA-and-NSA: HI! HOW YA DOIN? can i haz chizburger? X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.2 (h2.funkthat.com [127.0.0.1]); Sat, 21 Jun 2014 07:03:00 -0700 (PDT) Cc: freebsd-arm , freebsd-embedded@freebsd.org, Ian Lepore X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Jun 2014 14:03:02 -0000 Magnus Nilsson wrote this message on Sat, Jun 21, 2014 at 14:13 +0200: > While e.g. cat or md5 of an executable affects its speed, e.g. cp does not. > Could there be some read access that's unaffected by your patches? I believe that cp uses mmap instead of the read syscall like cat and md5... So this may be the case... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."