Date: Mon, 11 Jul 2005 11:55:41 -0700 From: Drew Tomlinson <drew@mykitchentable.net> To: Nelis Lamprecht <nlamprecht@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: FreeBSD 5 - What Options for SMP Kernel? -- SOLVED Message-ID: <42D2C0AD.9000600@mykitchentable.net> In-Reply-To: <7cbadc8705071023557f0eee34@mail.gmail.com> References: <42D21343.4040907@mykitchentable.net> <7cbadc8705071023557f0eee34@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 7/10/2005 11:55 PM Nelis Lamprecht wrote: >On 7/11/05, Drew Tomlinson <drew@mykitchentable.net> wrote: > > >>I just built my first 5.4-RELEASE system. I want a SMP kernel. The >>GENERIC kernel conf file contains this line: >> >>device apic # I/O apic >> >>According to NOTES, this is all that's required to build an SMP kernel. >> >> > >I don't see any mention of "this is all that's required" ? > > OK, NOTES doesn't say that explicitly. But neither does it mention any additional option(s) that ARE required which leads one to believe that "this IS all that's required". >>However my dmesg does not indicate that both processors are being used. >>In version 4, these two lines were required: >> >>options SMP # Symmetric MultiProcessor Kernel >>options APIC_IO # Symmetric (APIC) I/O >> >>I've searched Google but haven't found any definitive answers. Exactly >>what lines do I need in my kernel conf and how can I verify both >>processors are being used? >> >> > >If you look in the usual place /usr/src/sys/i386/conf you will see a >SMP file that includes the option SMP for the default SMP enabled >GENERIC kernel. It would make sense to put that option along with apic >in your custom SMP kernel. > >To verify after rebooting do a 'dmesg |grep CPU' and it should show >something along the lines of: > >CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3056.82-MHz 686-class CPU) > Hyperthreading: 2 logical CPUs >FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs > > Thanks for the pointer. I've added the SMP option and all is working. Cheers, Drew -- Visit The Alchemist's Warehouse Magic Tricks, DVDs, Videos, Books, & More! http://www.alchemistswarehouse.com
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?42D2C0AD.9000600>