From owner-freebsd-smp Tue Jun 4 16:37:12 1996 Return-Path: owner-smp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id QAA22928 for smp-outgoing; Tue, 4 Jun 1996 16:37:12 -0700 (PDT) Received: from Root.COM (implode.Root.COM [198.145.90.17]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id QAA22920 for ; Tue, 4 Jun 1996 16:37:09 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by Root.COM (8.7.5/8.6.5) with SMTP id QAA00591; Tue, 4 Jun 1996 16:36:52 -0700 (PDT) Message-Id: <199606042336.QAA00591@Root.COM> X-Authentication-Warning: implode.Root.COM: Host localhost [127.0.0.1] didn't use HELO protocol To: "Michael L. VanLoon -- HeadCandy.com" cc: Sean Eric Fagan , smp@freebsd.org Subject: Re: Unix/NT synchronization model (was: SMP progress?) In-reply-to: Your message of "Tue, 04 Jun 1996 16:16:46 PDT." <199606042316.QAA24168@MindBender.HeadCandy.com> From: David Greenman Reply-To: davidg@Root.COM Date: Tue, 04 Jun 1996 16:36:52 -0700 Sender: owner-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >For example, if I were to go find an OSF/1 (Digital Unix) system and >play around with it, would that be a good representation place to >start? Or would someone say "Oh no! Don't look at Digital Unix -- >it's SMP support really sucks!" :-) I'm just looking for peoples' >ideas and opinions here -- not an over-riding edict. Tell me what >your favorite Unix SMP system is... You may want to take a look at Mach's SMP locking and structure. It's not exactly what we'll be doing in FreeBSD, but it's not a too-bad example. Of course Mach is a microkernel design, but just overlook that while you're looking at the SMP related stuff. :-) Early SMP versions of just about every SMP Unix OS I know of started out being a single lock and became fine-grained in subsequant versions (in many cases before the code was officially released). -DG David Greenman Core-team/Principal Architect, The FreeBSD Project