From owner-freebsd-hackers@FreeBSD.ORG Mon Mar 15 21:42:30 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C59D316A4CE for ; Mon, 15 Mar 2004 21:42:30 -0800 (PST) Received: from mail019.syd.optusnet.com.au (mail019.syd.optusnet.com.au [211.29.132.73]) by mx1.FreeBSD.org (Postfix) with ESMTP id 717DD43D1F for ; Mon, 15 Mar 2004 21:42:29 -0800 (PST) (envelope-from PeterJeremy@optushome.com.au) Received: from cirb503493.alcatel.com.au (c211-30-75-229.belrs2.nsw.optusnet.com.au [211.30.75.229]) i2G5gMB11661 for ; Tue, 16 Mar 2004 16:42:23 +1100 Received: from cirb503493.alcatel.com.au (localhost.alcatel.com.au [127.0.0.1])i2G5gMSU024943 for ; Tue, 16 Mar 2004 16:42:22 +1100 (EST) (envelope-from jeremyp@cirb503493.alcatel.com.au) Received: (from jeremyp@localhost)i2G5f7rk024940; Tue, 16 Mar 2004 16:41:07 +1100 (EST) (envelope-from jeremyp) Date: Tue, 16 Mar 2004 16:41:07 +1100 From: Peter Jeremy To: Wes Peters Message-ID: <20040316054107.GJ56509@cirb503493.alcatel.com.au> References: <200403091201.23665.wes@softweyr.com> <20040314211654.05d0bb9f.wes@softweyr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040314211654.05d0bb9f.wes@softweyr.com> User-Agent: Mutt/1.4.2i cc: freebsd-hackers@freebsd.org Subject: Re: a serious error in sched_ule.c? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Mar 2004 05:42:30 -0000 On Sun, Mar 14, 2004 at 09:16:54PM -0800, Wes Peters wrote: >Sigh. Nobody really does compute-bound tasks anymore, do they? I really >miss "scientific programming." seti@home, the mersenne prime project, protein folding and the list goes on (the mersenne prime project web site includes an extensive list of other ways to help your CPU avoid the idle loop). I suspect more people now have a compute-bound process soaking their idle cycles than ever before. (Of course, these processes need to be using an interactive scheduler so the user doesn't notice the background process - even if the compute-bound task runs a bit slower as a result). Of course this isn't quite the same as a vector supercomputer doing "traditional" scientific programming - but no-one's ported FreeBSD to a Cray yet. Peter