From owner-freebsd-questions@FreeBSD.ORG Wed Nov 28 07:23:35 2007 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 77AB016A417 for ; Wed, 28 Nov 2007 07:23:35 +0000 (UTC) (envelope-from bri@numail.brianwhalen.net) Received: from numail.brianwhalen.net (dsl093-034-172.snd1.dsl.speakeasy.net [66.93.34.172]) by mx1.freebsd.org (Postfix) with ESMTP id 4336C13C455 for ; Wed, 28 Nov 2007 07:23:35 +0000 (UTC) (envelope-from bri@numail.brianwhalen.net) Received: by numail.brianwhalen.net (Postfix, from userid 1001) id 574BE114E5; Tue, 27 Nov 2007 23:04:22 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by numail.brianwhalen.net (Postfix) with ESMTP id 4DD45114E3; Tue, 27 Nov 2007 23:04:22 -0800 (PST) Date: Tue, 27 Nov 2007 23:04:22 -0800 (PST) From: Brian To: "Aryeh M. Friedman" In-Reply-To: <474CE269.4000608@gmail.com> Message-ID: <20071127230252.L3826@numail.brianwhalen.net> References: <474C3A12.9040107@gmail.com> <200711271657.00637.pieter@degoeje.nl> <474CA4E7.9060401@cran.org.uk> <20071127161036.L1233@numail.brianwhalen.net> <474CE269.4000608@gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Bruce Cran , Pieter de Goeje , Andy Greenwood , freebsd-questions@freebsd.org Subject: Re: Upper limit on make -j ? 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: Wed, 28 Nov 2007 07:23:35 -0000 There's a thread on the -stable list about 8 cores being an issue in a very specific case. I couldn't imagine setting j to something more than 2x or 3x at the most of your available cores. Brian On Tue, 27 Nov 2007, Aryeh M. Friedman wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Brian wrote: >> Isn't 1000 an unrealistically high value? >> > > For the next few years maybe but with core counts going up I can > easily see a 512 or 1024 core machine by say 2015.. i.e. Moore's law > may not apply to single tasking chips any mores but it seems to be in > full force for multi-core ones... this brings me to why I tried it in > the first place I was exploring weither or not FreeBSD was ready for > this kind of core count (specifically the idea of a multitasking OS > scheduling by allocating one process per core for core counts greater > then say 64)... I am in the process of considering the design > requirements for a OS I plan to do from the ground up and like to know > the limits of current ones. > > > - -- > Aryeh M. Friedman > Developer, not business, friendly > http://www.flosoft-systems.com > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.4 (FreeBSD) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFHTOJpJ9+1V27SttsRAhMCAJ902zwVIxCGecI2cAdIm2bywN383ACfU243 > HMUWkzcO8hH87PecYBmkgLc= > =5614 > -----END PGP SIGNATURE----- > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >