Date: Wed, 14 Sep 2011 23:21:33 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Andrew Boyer <aboyer@averesystems.com> Cc: freebsd-current@FreeBSD.org Subject: Re: Identification of HTT cores on newer (CPUID leaf 11) Intel processors Message-ID: <4E710CCD.6020509@FreeBSD.org> In-Reply-To: <70B018CB-4658-45DD-929E-A953B299E737@averesystems.com> References: <2C3C4570-C5F9-42F5-AA81-900151590DB8@averesystems.com> <4E7106DE.40707@FreeBSD.org> <70B018CB-4658-45DD-929E-A953B299E737@averesystems.com>
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on 14/09/2011 23:02 Andrew Boyer said the following: > Actually, it's not useless. If you don't set it to something other than zero > the machdep.hyperthreading_allowed tunable doesn't do anything, since it > can't tell which CPUs are actually HTT. Ah, you are right. That works correctly with my (not yet published) patch that doesn't make distinction between HTT flavors. But in the main tree "SMT" != HTT. -- Andriy Gapon
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