From owner-freebsd-smp Thu May 2 10: 1:39 2002 Delivered-To: freebsd-smp@freebsd.org Received: from avocet.prod.itd.earthlink.net (avocet.mail.pas.earthlink.net [207.217.120.50]) by hub.freebsd.org (Postfix) with ESMTP id 024FD37B41B; Thu, 2 May 2002 10:01:37 -0700 (PDT) Received: from pool0542.cvx22-bradley.dialup.earthlink.net ([209.179.200.32] helo=mindspring.com) by avocet.prod.itd.earthlink.net with esmtp (Exim 3.33 #2) id 173JxZ-0003Gs-00; Thu, 02 May 2002 10:01:37 -0700 Message-ID: <3CD170D4.48AEB353@mindspring.com> Date: Thu, 02 May 2002 10:01:08 -0700 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Jonathan Mini Cc: John Baldwin , freebsd-smp@FreeBSD.org, Andrew Gallatin Subject: Re: hlt when idle? References: <20020501151123.G30080@stylus.haikugeek.com> <20020502072949.C56560@stylus.haikugeek.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Jonathan Mini wrote: > I am obviously thinking about some other SMP implementation, but I have no > idea which one. Somebody, somewhere, sets the routing of the clock interrupt > to be delivered in a round-robin fashion, and then multiplies the clock > frequency by the number of processors. They're really proud of this solution, > because (they claim) it reduces contentions of clock-triggered events across > processors. > > Maybe it was Sun? You are an ex-Be-geek. Maybe it was the BeBox and the two processor PPC603e box from Apple? From memory, in addition to using MEI instead of MESI cache coherency because the CPUs were not built for SMP (the MEI arbitration was done by putting contention hardware in place of the L2 cache), interrupt routing was hardware round-robin. 8-). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message