From owner-freebsd-stable@FreeBSD.ORG Thu Apr 15 04:28:43 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 34910106564A; Thu, 15 Apr 2010 04:28:43 +0000 (UTC) (envelope-from maho.nakata@gmail.com) Received: from mail-gw0-f54.google.com (mail-gw0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id B6A9A8FC0A; Thu, 15 Apr 2010 04:28:42 +0000 (UTC) Received: by gwaa12 with SMTP id a12so525379gwa.13 for ; Wed, 14 Apr 2010 21:28:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:date:message-id:to:cc :subject:from:in-reply-to:references:x-mailer:mime-version :content-type:content-transfer-encoding; bh=3YQUFIP63xC0mAMVNhB9Ba03k/C+lF6k+BztjJS0jj8=; b=ddOVx+3PgbV7od0VMmikGnbWw+ApSAKZfbsiaEvD99Tv/cO4pkFzFNMesag1SDnPaX 3B8ExxXaSG4AU0GaHKSjUrYIag9YgL1DWmab8E0oirqkna4R98TdR9NRBZfjOk7CCNQf RPNe6WJO8+WgkTuRzKln0mYfkY6N8GZ1Ewv8c= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:date:message-id:to:cc:subject:from:in-reply-to:references :x-mailer:mime-version:content-type:content-transfer-encoding; b=TFSjr24LkU42JV0uIDi+tDXwl+TlwQE7HXu29VRmnKj5xjJAq7hvPm1mqPCsdv9kHC lGCAl3ce7GQAg+biwU5/JfvD52IkYVrMEFPR9ONE3e86QJS1jeEm7ptqXCySj+OaRcqO 9GfT7iANA9R8trfZ44NajX2T0C+srFsQH/U94= Received: by 10.100.74.5 with SMTP id w5mr15755497ana.206.1271305719383; Wed, 14 Apr 2010 21:28:39 -0700 (PDT) Received: from localhost (rikad42.riken.jp [134.160.214.42]) by mx.google.com with ESMTPS id 39sm295610yxd.24.2010.04.14.21.28.36 (version=SSLv3 cipher=RC4-MD5); Wed, 14 Apr 2010 21:28:38 -0700 (PDT) Sender: Maho NAKATA Date: Thu, 15 Apr 2010 13:28:34 +0900 (JST) Message-Id: <20100415.132834.229420430668646074.chat95@mac.com> To: smithi@nimnet.asn.au From: Maho NAKATA In-Reply-To: <20100415135034.J52200@sola.nimnet.asn.au> References: <20100415135034.J52200@sola.nimnet.asn.au> X-Mailer: Mew version 6.3 on Emacs 23.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Cc: amvandemore@gmail.com, freebsd-stable@freebsd.org, alc@freebsd.org, alan.l.cox@gmail.com, avg@freebsd.org, yanefbsd@gmail.com, als@modulus.org Subject: Re: HyperThreading makes worse to me X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Apr 2010 04:28:43 -0000 From: Ian Smith Subject: Re: HyperThreading makes worse to me (was Re: How to reproduce= : Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Core= i7 920) Date: Thu, 15 Apr 2010 14:21:30 +1000 (EST) > Er, shouldn't one of those say HTT on? and/or Turbo boost on? Else = > they're both the same test as [4] but with different results? sorry, Turbo Boost off, Hyper threading off: 82% (35GFlops) =A0 =A0[1] Turbo Boost off, Hyper threading on: 72% (30.5GFlops) =A0[2] HTT on performs always worse. > Clarification of all four possible test configs - 8 if you add pinnin= g = > CPUs or not - might make this a bit clearer? right. Pinning might not be so important I guess. Core i7 is not NUMA. Thanks, -- Nakata Maho http://accc.riken.jp/maho/ , JA OOO http://ja.openoffice= .org/ Blog: http://blog.goo.ne.jp/nakatamaho/ , GPG key: http://accc.riken= .jp/maho/maho.pgp.txt