From owner-freebsd-stable@FreeBSD.ORG Wed Sep 22 14:26:19 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 86E5C106564A for ; Wed, 22 Sep 2010 14:26:19 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: from mail-gy0-f182.google.com (mail-gy0-f182.google.com [209.85.160.182]) by mx1.freebsd.org (Postfix) with ESMTP id 3BC958FC13 for ; Wed, 22 Sep 2010 14:26:18 +0000 (UTC) Received: by gyg4 with SMTP id 4so213214gyg.13 for ; Wed, 22 Sep 2010 07:26:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=1zrJ4wGax9oY8i4cnK75ZBgbCb61rtE2hPPtWglJabM=; b=g9J2XrLHo29uf45WjQpD5hCrny+os1rp0rhLIkKx9ahE09Kz4ooYqjfE85SaNkVMiN WZD+DzJZ2GMHtVpkyCu+2JJieSesN74+qmNPyvcOdBwTHGqkdzeaEQOlcAjlcBakPk4g CTpuYN+nYXUiIhSfONAMm2UQj/BLeqRL9nm+E= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=hZoE880MwThoEqrwDz9EsI4ilolXJUUpYboDm2eLu6A7E6RN0uX8MEoCCmtAX8YVfM elofnHfREJLREjzciOp0ZJK3Z7gh/+iHcbAIXTvvQbqwTFp0ld+TTYDqOrqlBcUSr4Xk T0/Umo3iNukyWAFpqk2BdsXTKandPN8vnUrKc= MIME-Version: 1.0 Received: by 10.229.10.200 with SMTP id q8mr111751qcq.288.1285165049795; Wed, 22 Sep 2010 07:17:29 -0700 (PDT) Received: by 10.229.236.15 with HTTP; Wed, 22 Sep 2010 07:17:29 -0700 (PDT) In-Reply-To: <20100922230552.D11124@sola.nimnet.asn.au> References: <10b0bdef-2bb1-44c8-9ffb-7d3167147a4f@q2g2000vbk.googlegroups.com> <20100922081230.GA20489@server.vk2pj.dyndns.org> <20100922230552.D11124@sola.nimnet.asn.au> Date: Wed, 22 Sep 2010 15:17:29 +0100 Message-ID: From: Tom Evans To: Ian Smith Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: Adam Vande More , Bryce , freebsd-stable@freebsd.org, Peter Jeremy Subject: Re: SuperMicro i7 (UP) - very slow performance 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: Wed, 22 Sep 2010 14:26:19 -0000 On Wed, Sep 22, 2010 at 2:50 PM, Ian Smith wrote: > It seems far more than just CPU performance is awry. =C2=A0Adam's data fr= om > his i7 shows 2.7 times Bryce's speed for the md5 -t, maybe a lower EST > rate? - but that could no way account for buildworld taking 22.5 hours. > > Recent buildworld (albeit i386) on my Thinkpad T23 ran just shy of 3.5 > hours, without -j on an 1133MHz P3-M, 768MB of 133MHz RAM, 5400rpm UFS > disk - with X/KDE running meanwhile (~5-7% CPU penalty). > > cheers, Ian md5 -t is quite a small benchmark, even with his misfunctioning CPU it took <6 seconds to complete. If his problem is a misapplied heatsink/fan, then his CPU could be throttling when it gets hot, the hotter it gets the more it throttles, which could explain his massive buildworld walltime. Perhaps running something like: apply -0 "md5 -t" `jot 10` would display a notable difference. Intel chips are quite good at running without much cooling and not dieing, using thermal throttling to preserve the CPU. Cheers Tom