From owner-freebsd-smp Sat Sep 13 21:24:18 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id VAA19993 for smp-outgoing; Sat, 13 Sep 1997 21:24:18 -0700 (PDT) Received: from usr08.primenet.com (tlambert@usr08.primenet.com [206.165.6.208]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id VAA19986 for ; Sat, 13 Sep 1997 21:24:11 -0700 (PDT) Received: (from tlambert@localhost) by usr08.primenet.com (8.8.5/8.8.5) id VAA07740; Sat, 13 Sep 1997 21:24:08 -0700 (MST) From: Terry Lambert Message-Id: <199709140424.VAA07740@usr08.primenet.com> Subject: Re: SMP in FreeBSD 3.x.x To: missmanp@milo.cfw.com (Paul Missman) Date: Sun, 14 Sep 1997 04:24:08 +0000 (GMT) Cc: freebsd-smp@freebsd.org In-Reply-To: <199709140052.RAA09731@hub.freebsd.org> from "Paul Missman" at Sep 13, 97 08:56:29 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-freebsd-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > I see that the SMP source was merged with the 3.x.x development kernal. > Does this mean that 3.x.x, when released, will seamlessly support 1 - N > processors? Also, what do you imagine maximum N will be at 3.x.x release > time? I believe the original Intel spec was up to 4 processors, but I see a > lot of 8 processor servers coming out lately. A system can have up to 32 APICs. It is the APIC IDs that limit the number of processors. Given that a system will have an I/O APIC, the max is 31 (except for I2O systems, where the i960 also has an APIC, or systems with multiple bus controllers -- each with an APIC). So ~30. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.