From owner-freebsd-small@FreeBSD.ORG Tue May 23 00:04:25 2006 Return-Path: X-Original-To: freebsd-small@freebsd.org Delivered-To: freebsd-small@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5EA1516A870 for ; Tue, 23 May 2006 00:04:25 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (vc4-2-0-87.dsl.netrack.net [199.45.160.85]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0A42743D46 for ; Tue, 23 May 2006 00:04:24 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from localhost (localhost.village.org [IPv6:::1] (may be forged)) by harmony.bsdimp.com (8.13.4/8.13.4) with ESMTP id k4N01ex7075941; Mon, 22 May 2006 18:01:40 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Mon, 22 May 2006 18:01:39 -0600 (MDT) Message-Id: <20060522.180139.41705337.imp@bsdimp.com> To: root@parse.com From: Warner Losh In-Reply-To: <200605161629.k4GGTPfN065519@amd64.ott.parse.com> References: <200605161629.k4GGTPfN065519@amd64.ott.parse.com> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: freebsd-small@freebsd.org Subject: Re: Smallest/fastest x86 6.0 X-BeenThere: freebsd-small@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 May 2006 00:04:25 -0000 > Can anyone give me a ballpark idea on what size the smallest > image would be, and how fast it could boot, for a 6.0 (or 6.1) > bare bones x86 kernel with a serial driver, filesystem (suitable > for a 32MB flash device; even a DOS filesystem is fine) and > enough guts to load a "hello world"-sized C program, on a 500 > MHz PIII class of machine? I'm hoping for something along the > lines of 2-4MB and <10s ... I've scaled FreeBSD booting to a multi-user prompt down to about a 8MB system. FreeBSD booting a custom application should be doable in the 2MB range. FreeBSD on a soekris can boot in < 10s to login prompt using the standard rc files, with the 'unused' ones removed. It took about 3s to get to the start of rc on the soekris box. Warner