From owner-freebsd-hackers@FreeBSD.ORG Mon Jun 11 22:21:55 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 89A661065676 for ; Mon, 11 Jun 2012 22:21:55 +0000 (UTC) (envelope-from bfalk_bsd@brandonfa.lk) Received: from mail-qa0-f49.google.com (mail-qa0-f49.google.com [209.85.216.49]) by mx1.freebsd.org (Postfix) with ESMTP id 355F08FC1F for ; Mon, 11 Jun 2012 22:21:55 +0000 (UTC) Received: by qabj40 with SMTP id j40so2885213qab.15 for ; Mon, 11 Jun 2012 15:21:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brandonfa.lk; s=google; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding; bh=0M1ofSk0i4BCQcidPSBi9w7/42sZbeMUCTzRkSm2INs=; b=RA8UFLoM/rfiwus4DtDxEJz7CDpJIPY8KzvcUF0Ltgy6D/Aj7gX7yFHa/Imu1X0lMv GFRI55LIEJOrbRhwGmlZ4IwcjW4BzbPv/efDD4P/AgjshWs3BkWksO/dOP/j4W7vehcP ZLr2iQJ4x+2ZgJrsXCJHn/FFjdec+nw6IjpX0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding:x-gm-message-state; bh=0M1ofSk0i4BCQcidPSBi9w7/42sZbeMUCTzRkSm2INs=; b=Yu7C+f6sHbf2zIQWshnJyRJ5sxnjaqWNR86UuP7EC7NG9ric2D5P0ps0JapSksEBw7 9j5OQDIVAIOCW2YOxbU3Z6uNIDWst0g1UOoRCis7tg7efpO7ADzg+YMfjIFdiVWv7Nhm TKovtfxozj/45rT6EbzH/pZCfEUZWqGSXwzY165IytcWRKqT/8gL1bKr7dI2XPuKyEsT gn49dgbD772bqj8EwEHjCAdgo2oS+pWu2v4WW220ou4iMspFuFzLAoQxnqvFIhILebpF x2xUjXXq8Y/PPJsNGR9hhuSNfqSKPNamRlXKINsUUrxQv21kLYKTW6Rpbgqyjsei/fQo TIvA== Received: by 10.224.107.195 with SMTP id c3mr16368754qap.23.1339453314468; Mon, 11 Jun 2012 15:21:54 -0700 (PDT) Received: from [192.168.42.64] (wsip-184-183-177-134.dc.dc.cox.net. [184.183.177.134]) by mx.google.com with ESMTPS id e2sm31214170qap.15.2012.06.11.15.21.53 (version=SSLv3 cipher=OTHER); Mon, 11 Jun 2012 15:21:53 -0700 (PDT) Message-ID: <4FD66F7E.2060404@brandonfa.lk> Date: Mon, 11 Jun 2012 18:21:50 -0400 From: Brandon Falk User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: freebsd-hackers@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gm-Message-State: ALoCoQkPOtRpdke3V7xz7XZmKzcPEq9cin5IYxALevERL8SjlkidOoTwHrx53sg6NWmFPbnPvenD Subject: FreeBSD Boot Times X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jun 2012 22:21:55 -0000 Greetings, I was just wondering what it is that FreeBSD does that makes it take so long to boot. Booting into Ubuntu minimal or my own custom Linux distro, literally takes 0.5-2 seconds to boot up to shell, where FreeBSD takes about 10-20 seconds. I'm not sure if anything could be parallelized in the boot process, but Linux somehow manages to do it. The Ubuntu install I do pretty much consists of a shell and developers tools, but it still has a generic kernel. There must be some sort of polling done in the FreeBSD boot process that could be parallelized or eliminated. Anyone have any suggestions? Note: This isn't really an issue, moreso a curiosity. -Brandon