From owner-freebsd-current@FreeBSD.ORG Fri Apr 18 00:34:15 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E44CF106566B for ; Fri, 18 Apr 2008 00:34:15 +0000 (UTC) (envelope-from obrien@NUXI.org) Received: from dragon.nuxi.org (trang.nuxi.org [74.95.12.85]) by mx1.freebsd.org (Postfix) with ESMTP id BDAF88FC20 for ; Fri, 18 Apr 2008 00:34:15 +0000 (UTC) (envelope-from obrien@NUXI.org) Received: from dragon.nuxi.org (obrien@localhost [127.0.0.1]) by dragon.nuxi.org (8.14.1/8.14.1) with ESMTP id m3I0XxLq013239; Thu, 17 Apr 2008 17:33:59 -0700 (PDT) (envelope-from obrien@dragon.nuxi.org) Received: (from obrien@localhost) by dragon.nuxi.org (8.14.2/8.14.1/Submit) id m3I0XxHG013238; Thu, 17 Apr 2008 17:33:59 -0700 (PDT) (envelope-from obrien) Date: Thu, 17 Apr 2008 17:33:59 -0700 From: "David O'Brien" To: gnn@freebsd.org Message-ID: <20080418003359.GC11705@dragon.NUXI.org> Mail-Followup-To: obrien@freebsd.org, gnn@freebsd.org, Andrew Gallatin , freebsd-current@freebsd.org References: <18431.23276.913397.188219@grasshopper.cs.duke.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: FreeBSD 8.0-CURRENT User-Agent: Mutt/1.5.16 (2007-06-09) Cc: freebsd-current@freebsd.org, Andrew Gallatin Subject: Re: TSC Timecounter and multi-core/SMP X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: obrien@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Apr 2008 00:34:16 -0000 On Tue, Apr 15, 2008 at 04:41:22PM +0900, gnn@freebsd.org wrote: > I also believe that at least per processor there is only 1 TSC, that > is, on a 2 or 4 core, all cores share the same TSC. Nope. (at least nope for AMD processors) -- -- David (obrien@FreeBSD.org)