From owner-freebsd-stable Sat Oct 28 7:34: 4 2000 Delivered-To: freebsd-stable@freebsd.org Received: from point.osg.gov.bc.ca (point.osg.gov.bc.ca [142.32.102.44]) by hub.freebsd.org (Postfix) with ESMTP id 89D5537B479 for ; Sat, 28 Oct 2000 07:33:58 -0700 (PDT) Received: (from daemon@localhost) by point.osg.gov.bc.ca (8.8.7/8.8.8) id HAA16077; Sat, 28 Oct 2000 07:33:20 -0700 Received: from passer.osg.gov.bc.ca(142.32.110.29) via SMTP by point.osg.gov.bc.ca, id smtpda16075; Sat Oct 28 07:33:02 2000 Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.11.0/8.9.1) id e9SEX2316168; Sat, 28 Oct 2000 07:33:02 -0700 (PDT) Received: from cwsys9.cwsent.com(10.2.2.1), claiming to be "cwsys.cwsent.com" via SMTP by passer9.cwsent.com, id smtpdL16166; Sat Oct 28 07:32:49 2000 Received: (from uucp@localhost) by cwsys.cwsent.com (8.11.1/8.9.1) id e9SEWmP08908; Sat, 28 Oct 2000 07:32:48 -0700 (PDT) Message-Id: <200010281432.e9SEWmP08908@cwsys.cwsent.com> Received: from localhost.cwsent.com(127.0.0.1), claiming to be "cwsys" via SMTP by localhost.cwsent.com, id smtpdiR8904; Sat Oct 28 07:32:33 2000 X-Mailer: exmh version 2.2 06/23/2000 with nmh-1.0.4 Reply-To: Cy Schubert - ITSD Open Systems Group From: Cy Schubert - ITSD Open Systems Group X-OS: FreeBSD 4.1.1-RELEASE X-Sender: cy To: Glendon Gross Cc: Michel Talon , "freebsd-stable@FreeBSD.ORG" Subject: Re: "Malloc type lacks magic" show-stopper solved In-reply-to: Your message of "Fri, 27 Oct 2000 06:36:58 PDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sat, 28 Oct 2000 07:32:33 -0700 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message , Glendon G ross writes: > > This reminds me of another issue I have wondered about for some time. > Are there major advantages to be gained by disabling support for other > architectures in the kernel build file? I have been routinely turning off > 386 and 486 support, thinking this would speed things up... but I'm not > sure of the soundness of this logic. Does anyone know if disabling > support for other CPU's increases performance? There are sections of code in the kernel specific to a particular CPU. By specifying the CPU, you ifdef out any code specific to other CPU's in the kernel making it slightly smaller and faster. For today's PII's and PIII's I don't think that the additional instructions make much of a noticeable difference in the speed of the machine, however on older P120's, 486's, and 386's, the additional instructions would have more of a noticeable impact. Regards, Phone: (250)387-8437 Cy Schubert Fax: (250)387-5766 Team Leader, Sun/DEC Team Internet: Cy.Schubert@osg.gov.bc.ca Open Systems Group, ITSD, ISTA Province of BC To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message