From owner-freebsd-questions@FreeBSD.ORG Thu Aug 7 17:20:04 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 124931065670 for ; Thu, 7 Aug 2008 17:20:04 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from weak.local (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 224D98FC22; Thu, 7 Aug 2008 17:20:02 +0000 (UTC) (envelope-from kris@FreeBSD.org) Message-ID: <489B2EA9.6000208@FreeBSD.org> Date: Thu, 07 Aug 2008 19:19:37 +0200 From: Kris Kennaway User-Agent: Thunderbird 2.0.0.16 (Macintosh/20080707) MIME-Version: 1.0 To: Mark Tinguely References: <200808071626.m77GQ6vf033517@casselton.net> In-Reply-To: <200808071626.m77GQ6vf033517@casselton.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: mkhitrov@gmail.com, freebsd-questions@freebsd.org Subject: Re: 64-bit Linux Binary Compatibility (for Matlab) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Aug 2008 17:20:04 -0000 Mark Tinguely wrote: >> Date: Thu, 7 Aug 2008 09:47:45 -0400 >> From: mkhitrov@gmail.com >> To: freebsd-questions@freebsd.org >> Apparently Matlab tries to allocate a continuous chunk of memory, and >> we needed to upgrade to 64-bit hardware to give it access to more than >> 1GB of memory, which is about the most that it was able to get before. >> It's a lousy explanation, but I wasn't employed at this place when >> this diagnosis was made. > > Large contiguous allocations have to occur during or soon after booting because > of memory fragmentation. To the best of my knowledge matlab does not run in the kernel and use contigmalloc() ;-) User applications in UNIX use *virtual* memory. Kris