From owner-freebsd-hackers Thu Sep 12 12:52: 6 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BBF6637B400; Thu, 12 Sep 2002 12:52:04 -0700 (PDT) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8040843E65; Thu, 12 Sep 2002 12:52:04 -0700 (PDT) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id E609572FD2; Thu, 12 Sep 2002 12:51:19 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id E4D6772FD1; Thu, 12 Sep 2002 12:51:19 -0700 (PDT) Date: Thu, 12 Sep 2002 12:51:19 -0700 (PDT) From: Doug White To: John Baldwin Cc: freebsd-hackers@freebsd.org, Subject: Re: Dell 2650 SMP perf question In-Reply-To: Message-ID: <20020912124822.G82726-100000@carver.gumbysoft.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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