From owner-freebsd-current@FreeBSD.ORG Thu Jul 7 12:25:09 2011 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 133CA1065672 for ; Thu, 7 Jul 2011 12:25:09 +0000 (UTC) (envelope-from freebsd-current@m.gmane.org) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by mx1.freebsd.org (Postfix) with ESMTP id 3F55B8FC1C for ; Thu, 7 Jul 2011 12:25:07 +0000 (UTC) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Qendh-0008AE-Rs for freebsd-current@freebsd.org; Thu, 07 Jul 2011 14:25:05 +0200 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 07 Jul 2011 14:25:05 +0200 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 07 Jul 2011 14:25:05 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-current@freebsd.org From: Ivan Voras Date: Thu, 07 Jul 2011 14:21:27 +0200 Lines: 8 Message-ID: References: <20110706170132.GA68775@troutmask.apl.washington.edu> <5080.1309971941@critter.freebsd.dk> <20110706180001.GA69157@troutmask.apl.washington.edu> <4E14A54A.4050106@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.2.12) Gecko/20101102 Thunderbird/3.1.6 In-Reply-To: <4E14A54A.4050106@freebsd.org> X-Enigmail-Version: 1.1.2 Cc: freebsd-questions@freebsd.org Subject: Re: Heavy I/O blocks FreeBSD box for several seconds 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: Thu, 07 Jul 2011 12:25:09 -0000 On 06/07/2011 20:11, Nathan Whitehorn wrote: > I've seen exactly this problem with multi-threaded math libraries, as > well. Using parallel GotoBLAS on FreeBSD gives terrible performance > because the threads keep migrating between CPUs, causing frequent cache > misses. On both schedulers?