Date: Mon, 7 Nov 2005 20:05:24 +0100 From: Roland Smith <rsmith@xs4all.nl> To: jwl@io.dk Cc: freebsd-questions@freebsd.org Subject: Re: enable smp / hyperthreading Message-ID: <20051107190524.GA77411@slackbox.xs4all.nl> In-Reply-To: <20051107185226.M70218@io.dk> References: <20051107185226.M70218@io.dk>
next in thread | previous in thread | raw e-mail | index | archive | help
--0F1p//8PRICkK4MW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Nov 07, 2005 at 07:53:20PM +0100, jwl@io.dk wrote: > Hi >=20 > I've just installed 6.0-RELASE and am trying to get SMP to work (I have af > Pentium 4 with HT). So I've compiled the kernel with 'options SMP' and > according to dmesg the two CPUs are found: >=20 > FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs > cpu0 (BSP): APIC ID: 0 > cpu1 (AP): APIC ID: 1 >=20 > But I'm not sure that both are enabled, because at this is at the end of > dmesg and I dont see the other CPU being enabled somewhere: >=20 > SMP: AP CPU #1 Launched! I think it is referring to the Auxiliary Processor (AP), because the BSP (don't know what that stands for, though) is obviously already active. =20 > According to 'sysctl -a' there are 2 CPUs, but only 1 active and SMP > doesnt seem to be disabled: >=20 > kern.smp.cpus: 2 > kern.smp.disabled: 0 > kern.smp.active: 1 sysctl -d kern.smp.active kern.smp.active: Number of Auxillary Processors (APs) that were successfully started This is the number of _extra_ CPUs, which chould be 1. =20 Roland --=20 R.F.Smith (http://www.xs4all.nl/~rsmith/) Please send e-mail as plain text. public key: http://www.xs4all.nl/~rsmith/pubkey.txt --0F1p//8PRICkK4MW Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDb6V0EnfvsMMhpyURAiIOAJ46++2hEBg8rESZSe04PMY2Nkaa9ACfZwHo BsBsfqCDA96EtFw5Pky12Ok= =bqQ+ -----END PGP SIGNATURE----- --0F1p//8PRICkK4MW--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20051107190524.GA77411>