Date: Mon, 18 Jun 2012 15:53:26 -0700 From: Doug Barton <dougb@FreeBSD.org> To: Richard Yao <ryao@gentoo.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Vincent Hoffman <vince@unsane.co.uk>, Nathan Whitehorn <nwhitehorn@freebsd.org>, Outback Dingo <outbackdingo@gmail.com>, openrc@gentoo.org, =?ISO-8859-1?Q?Atte_Peltom=E4ki?= <atte.peltomaki@iki.fi> Subject: Re: Replacing rc(8) (Was: FreeBSD Boot Times) Message-ID: <4FDFB166.2040709@FreeBSD.org> In-Reply-To: <4FDF6586.9060501@gentoo.org> References: <20120615124849.GI96212@ass.kameli.org> <CAKYr3zxSOFOUghqao=3U_8sBNHwqce8AGK6mSFd6is11qzjS8w@mail.gmail.com> <20120618081140.GK96212@ass.kameli.org> <4FDF6177.5050608@unsane.co.uk> <4FDF6586.9060501@gentoo.org>
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It's unfortunate that this thread evolved into a discussion about replacing rc.d, since that's almost certainly not relevant to the original topic of improving the overall boot time. If you analyze the boot process thoroughly you should see that out of the total time taken to boot, nearly 0 is spent by rc.d actually doing something. Almost all of the actual time is spent waiting for other stuff, either the kernel (primarily) or the services that the system is running actually starting up. The latter item is the only place where making changes to rc.d is going to help, and only then by parellelizing, and even then you are not really going to gain much since most things at boot time are serial. So while talk of how to get your favorite boot-time manager into FreeBSD may be entertaining, it's not likely to be productive, and almost certainly isn't going to help the goal of actually making the boot time faster. But, I'm willing to be proven wrong by someone who actually _implements_ one of these systems and can demonstrate, in a statistically rigorous fashion, how much the boot time is improved. Doug
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