From owner-freebsd-current@FreeBSD.ORG Tue Jan 16 22:25:08 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 329A116A558 for ; Tue, 16 Jan 2007 22:25:08 +0000 (UTC) (envelope-from kip.macy@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.171]) by mx1.freebsd.org (Postfix) with ESMTP id A20B613C441 for ; Tue, 16 Jan 2007 22:25:07 +0000 (UTC) (envelope-from kip.macy@gmail.com) Received: by ug-out-1314.google.com with SMTP id o2so1663977uge for ; Tue, 16 Jan 2007 14:25:07 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=qPQWnL4/4RRCvudoZHOUzW6JnkRNyO7wdLL98jxX+P92M1Ei+7Ys8VjWWoMqk1T+YJannuYUjOajeW7ZWZsKTFkEYmUmLj0Ruf5IkblP3h4fCQ0CeKFBVJfrEZWSczrenbXCIZYsaiqN/+4qxNpf9aBKc7HirnGoVcxO/OFLNP8= Received: by 10.82.107.15 with SMTP id f15mr1381445buc.1168986306133; Tue, 16 Jan 2007 14:25:06 -0800 (PST) Received: by 10.82.191.16 with HTTP; Tue, 16 Jan 2007 14:25:06 -0800 (PST) Message-ID: Date: Tue, 16 Jan 2007 14:25:06 -0800 From: "Kip Macy" To: "Ivan Voras" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <3bbf2fe10607250813w8ff9e34pc505bf290e71758@mail.gmail.com> <3bbf2fe10607250814m1a476f09p2d962dedc0c99be1@mail.gmail.com> <200607251232.51230.jhb@freebsd.org> <3bbf2fe10607251004wf94e238xb5ea7a31c973817f@mail.gmail.com> <3bbf2fe10607261127p3f01a6c3w80027754f7d4e594@mail.gmail.com> <3bbf2fe10607281004o6727e976h19ee7e054876f914@mail.gmail.com> <3bbf2fe10701160851r79b04464m2cbdbb7f644b22b6@mail.gmail.com> <20070116154258.568e1aaf@pleiades.nextvenue.com> Cc: freebsd-current@freebsd.org, freebsd-arch@freebsd.org Subject: Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jan 2007 22:25:08 -0000 On 1/16/07, Ivan Voras wrote: > Kip Macy wrote: > > x86 pre-P4 had 32-byte cache lines. Thus older processors will not benefit. > > But it does seem to hurt the performance a bit - maybe it's time to add > another CPU option like I586_CPU and I686_CPU? Unless there is a compelling reason not to do so, I think that that would be a good idea. -Kip