From owner-freebsd-performance@FreeBSD.ORG Sat Nov 25 11:22:19 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 104F216A417 for ; Sat, 25 Nov 2006 11:22:19 +0000 (UTC) (envelope-from fullermd@over-yonder.net) Received: from optimus.centralmiss.com (ns.centralmiss.com [206.156.254.79]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5AB5243D6D for ; Sat, 25 Nov 2006 11:21:30 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from draco.over-yonder.net (adsl-072-148-013-213.sip.jan.bellsouth.net [72.148.13.213]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by optimus.centralmiss.com (Postfix) with ESMTP id 1731A284E9; Sat, 25 Nov 2006 05:22:17 -0600 (CST) Received: by draco.over-yonder.net (Postfix, from userid 100) id 89C3261C36; Sat, 25 Nov 2006 05:22:16 -0600 (CST) Date: Sat, 25 Nov 2006 05:22:16 -0600 From: "Matthew D. Fuller" To: Divacky Roman Message-ID: <20061125112216.GC91673@over-yonder.net> References: <200611200454.kAK4sdat083568@lava.sentex.ca> <7.1.0.9.0.20061120160757.14d4a728@sentex.net> <200611220247.kAM2l9JP095066@lava.sentex.ca> <20061122130947.GM20405@obiwan.tataz.chchile.org> <200611231652.kANGqJsr005016@lava.sentex.ca> <1164356894.4306.1.camel@massimo.datacode.it> <200611242027.kAOKRYZg012113@lava.sentex.ca> <20061124210305.GA49228@stud.fit.vutbr.cz> <200611242117.kAOLHuBP012313@lava.sentex.ca> <20061125083605.GA17350@stud.fit.vutbr.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061125083605.GA17350@stud.fit.vutbr.cz> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.11-fullermd.3 Cc: freebsd-performance@freebsd.org, Mike Tancsa Subject: Re: em forwarding performance (was Proposed 6.2 em RELEASE patch X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Nov 2006 11:22:19 -0000 On Sat, Nov 25, 2006 at 09:36:05AM +0100 I heard the voice of Divacky Roman, and lo! it spake thus: > > hm.. now I am confused. the rule is that having I586_CPU improves > performance because optimized bzero/bcopy is included (its not > included if you only have I686_CPU). Haven't we been by this before? It's not included even if you have I586_CPU either. See src/sys/i386/isa/npx.c, line 432: #ifdef I586_CPU_XXX <-------- ^^^ This has been disabled since r1.95, in 2001 (in 5-CURRENT days). There may be SOMETHING about including I586_CPU that speeds things up, but it ain't that. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.