From owner-freebsd-current@FreeBSD.ORG Tue Sep 4 16:01:10 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3926D1065678 for ; Tue, 4 Sep 2012 16:01:10 +0000 (UTC) (envelope-from rysto32@gmail.com) Received: from mail-vb0-f54.google.com (mail-vb0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id E85B18FC1B for ; Tue, 4 Sep 2012 16:01:09 +0000 (UTC) Received: by vbmv11 with SMTP id v11so8913428vbm.13 for ; Tue, 04 Sep 2012 09:01:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=DnOHLtydX+Sh61pGxXOdmBlytLIX5UTk5x8JnnelkzU=; b=O4WiAgcYhRP28v+kN3RTCJkaepD+eC8ef7wni7XMaTqYJJxMNmkRsc3ZBNRGxDqboG aD+xCy2TOdwg+vHZvxNnC7ZFdCg8m7FJ4tUR0X5KYjHxYV+PNjgRg/B8pqrloFVBVaEO ryxA1qBX6aI2si9lbvmAEjr8QqB+dwXEXbnq7yAWoQLVrHgtGUO3eYdPeYVPnEj/7XDt njt8uGY41r3dThBNsVtTUf1UQlM1HeIOxdw0ljpE+THaGEqJR6epQ1SwUl3PkqQ4tbbX b19hhgDruGK0XQR3zhtmU8+jgf5NtGyuWibYCAmCQe6wxH6fEIfT2twolmoPHALkv3h2 Q2FQ== MIME-Version: 1.0 Received: by 10.52.27.239 with SMTP id w15mr9877000vdg.96.1346774469053; Tue, 04 Sep 2012 09:01:09 -0700 (PDT) Received: by 10.58.207.114 with HTTP; Tue, 4 Sep 2012 09:01:09 -0700 (PDT) Date: Tue, 4 Sep 2012 12:01:09 -0400 Message-ID: From: Ryan Stone To: FreeBSD Current Content-Type: text/plain; charset=ISO-8859-1 Subject: machdep.hyperthreading_allowed does not affect SMT cores X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Sep 2012 16:01:10 -0000 I have a Intel Sandy Bridge system that reports that it has SMT cores instead of HTT(under a derivative of FreeBSD 8.2). I'll admit that I don't at all understand the distinction between the two -- I thought that HTT was just Intel's name for SMT. In any case, is there any reason that machdep.hyperthreading_allowed should not apply to SMT cores, too?