From owner-freebsd-stable@FreeBSD.ORG Wed Apr 14 16:45:05 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 D727E1065670; Wed, 14 Apr 2010 16:45:05 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-qy0-f175.google.com (mail-qy0-f175.google.com [209.85.221.175]) by mx1.freebsd.org (Postfix) with ESMTP id 6096C8FC0A; Wed, 14 Apr 2010 16:45:04 +0000 (UTC) Received: by qyk5 with SMTP id 5so460285qyk.3 for ; Wed, 14 Apr 2010 09:45:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:cc:content-type; bh=HrVM70BLasgjdQ/yoVk/6U2jdM8lVYkGkiWNR0gWbQg=; b=diEGC2/rs20icGX6ttaDPpcvQkd1hnJk4x5LUAI/SnyPFFk8f5YWFWlSe+L/PoOOzi kHfS6Ao7942sCfwZpPcw/dpabOs9hEiUIFP17nxXHoDQo3t2meSKVQ5oCuMQRPdl0CZN ygCMnKoQd8UYnQWMz7WIIxlhJ3TXFjDrLMpUk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=qND0ZIpWeoLs84kD+tE6ejXMry2wU7r78kbkxfquN4RWzFurK5bZkqJ3GsC3YaXBSp s2GIiObWafBDrTPvMnTFUUaBPrpJpdC6/+2MMjUMvdyDgjXrsIQTDclWSir7b9QYKln1 jTN6qWOTC8lYDN8XY7bpQojnRjekg+xb5i8ZA= MIME-Version: 1.0 Received: by 10.229.85.147 with HTTP; Wed, 14 Apr 2010 09:45:04 -0700 (PDT) In-Reply-To: References: <4BC402B7.5000400@modulus.org> <20100414.082109.29593248145846106.chat95@mac.com> <4BC5DEB4.1090208@freebsd.org> Date: Wed, 14 Apr 2010 11:45:04 -0500 Received: by 10.229.191.18 with SMTP id dk18mr262461qcb.9.1271263504301; Wed, 14 Apr 2010 09:45:04 -0700 (PDT) Message-ID: From: Adam Vande More To: Andriy Gapon Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: alc@freebsd.org, Maho NAKATA , alan.l.cox@gmail.com, freebsd-stable@freebsd.org, als@modulus.org Subject: Re: How to reproduce: Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Corei7 920 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, 14 Apr 2010 16:45:05 -0000 On Wed, Apr 14, 2010 at 11:34 AM, Adam Vande More wrote: > > > > That's about 67% utilization, turning off HTT drops it more. HTT on the > newer cores is good, not bad. > Well that was completely contrarty to some tests I'd run when I first got the cpu. With HTT off: n: 3000 time : 44.705516 or 11.760183 Mflops : 45932.959253 n: 3100 time : 50.598581 or 14.270123 Mflops : 41766.437458 n: 3200 time : 55.748192 or 15.780977 Mflops : 41541.458400 n: 3300 time : 62.072217 or 17.441431 Mflops : 41221.262070 n: 3400 so that's about 79% right there. also if I run cpuset on the dgemm then the utilization is basically at the theoretical max for one core so at least that part is working. -- Adam Vande More