Date: Thu, 12 Sep 2002 12:51:19 -0700 (PDT) From: Doug White <dwhite@gumbysoft.com> To: John Baldwin <jhb@FreeBSD.org> Cc: freebsd-hackers@freebsd.org, <hackers@d.sparks.net> Subject: Re: Dell 2650 SMP perf question Message-ID: <20020912124822.G82726-100000@carver.gumbysoft.com> In-Reply-To: <XFMail.20020911130914.jhb@FreeBSD.org>
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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. :-) Who's going to do the work? -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | 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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