Date: Tue, 21 Nov 2006 14:43:31 -0500 From: "Jay Gordon" <jgordon@datapipe.com> To: "Kirk Strauser" <kirk@strauser.com>, <freebsd-questions@freebsd.org> Subject: RE: Disabled HTT in the kernel but not the BIOS? Message-ID: <F0E40104E1936B46B8B8FA469D2269450F138CEE@exchewr01.datapipe-corp.net> In-Reply-To: <200611210640.09814.kirk@strauser.com>
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This is fine. It still shows it even though it will only load 0 and 2. If you are really worried, turn it off in bios. Jay Gordon Unix Systems Administrator DataPipe Managed Hosting Services - What It Means To Be Sure -=20 jgordon@datapipe.com | http://www.datapipe.com Tel: 201.792.1918 x2402 | Fax: 201-792-3090 -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Kirk Strauser Sent: Tuesday, November 21, 2006 7:40 AM To: freebsd-questions@freebsd.org Subject: Disabled HTT in the kernel but not the BIOS? I have a dual Xeon/HTT server that I run with machdep.hyperthreading_allowed=20 set to 0. At boot, it detects 4 CPUs: FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 but top confirms that only processors 0 and 2 are actually running. So, other=20 than top being unwilling to report more than 50% CPU load, are there any other problems with running like this, such as the cache being split for the=20 benefit of the HTT that I'm not enabling? I can live with the cosmetic=20 glitch, but don't want to take a pointless performance hit. --=20 Kirk Strauser
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