From owner-freebsd-questions Fri Nov 2 21:17:56 2001 Delivered-To: freebsd-questions@freebsd.org Received: from dv-db.com (dv-db.com [207.159.141.95]) by hub.freebsd.org (Postfix) with ESMTP id A4DDC37B408 for ; Fri, 2 Nov 2001 21:17:53 -0800 (PST) Received: from mark2 (host217-35-43-63.in-addr.btopenworld.com [217.35.43.63]) by dv-db.com (8.9.3/8.9.3) with SMTP id FAA18654 for ; Sat, 3 Nov 2001 05:17:52 GMT Message-ID: <002d01c16426$b24648d0$0200a8c0@mark2> From: "Mark Hughes" To: Subject: SMP kernel with 1 processor.... Date: Sat, 3 Nov 2001 05:15:54 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I know it sounds strange, but really it isn't that strange... We're just setting up a web server, we're using a dual-processor server but initially it will only have one processor in it. What we want to do really is to set it up for two processors in a way that won't impact the performance while it is only used with one, so we can add in a second processor quickly and with minimal downtime when (and if) need be. So, is it okay to compile a kernel with the following options uncommented, and will it impact performance at all to do so: # To make an SMP kernel, the next two are needed #options SMP # Symmetric MultiProcessor Kernel #options APIC_IO # Symmetric (APIC) I/O Also, other than these two options, is there anything else that needs to be enabled/disabled to work with SMP? TIA, Mark -- Mark Hughes - DVD & Film Content Manager, Technical Officer Digital Spy Ltd http://www.digitalspy.co.uk/ Your number one source for digital media and entertainment news! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message