Date: Thu, 12 Sep 2002 16:09:22 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Doug White <dwhite@gumbysoft.com> Cc: hackers@d.sparks.net, freebsd-hackers@freebsd.org Subject: Re: Dell 2650 SMP perf question Message-ID: <XFMail.20020912160922.jhb@FreeBSD.org> In-Reply-To: <20020912124822.G82726-100000@carver.gumbysoft.com>
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On 12-Sep-2002 Doug White wrote: > On Wed, 11 Sep 2002, John Baldwin wrote: > >> >> On 11-Sep-2002 Doug White wrote: >> > Random notes: >> > >> > On Tue, 10 Sep 2002 hackers@d.sparks.net wrote: >> > >> >> Hyperthreading is turned off, I believe. There aren't any >> >> "hyperthreading" swithes in the bios I could find, but the "logical >> >> processor" option is turned off. >> > >> > HyperThreading is not supported on FreeBSD at current. It requires some >> > ACPI work which hasn't happened yet. >> >> Not quite. It depends on the BIOS. Some BIOS's include logical CPU's >> in the mptable, in which case FreeBSD will work with them fine. Some >> only include logical CPU's in the APIC MADT which FreeBSD doesn't yet >> use on i386 (we use it on ia64 and will eventually use it on i386 as >> we need it for ACPI interrupt routing on SMP.) > > We went through this a few weeks ago ... I'm still trying to find a system > who puts them in the mptable. :-) Look in the smp archives for people who had it work: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=33677+0+archive/2002/freebsd-smp/20020630.freebsd-smp and http://docs.freebsd.org/cgi/getmsg.cgi?fetch=50804+0+archive/2002/freebsd-smp/20020512.freebsd-smp > Who's going to do the work? Probably myself since we need the MADT stuff to work for interrupt routing to work under SMP with ACPI. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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