Date: Thu, 14 Jun 2012 09:34:22 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Richard Yao <ryao@gentoo.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, openrc@gentoo.org Subject: Re: FreeBSD Boot Times Message-ID: <4FD9F66E.5010709@freebsd.org> In-Reply-To: <4FD8DD76.4080001@gentoo.org> References: <4FD66F7E.2060404@brandonfa.lk> <71dc991c8d1b4d2c91ff942fc5f8f340@HUBCAS2.cs.stonybrook.edu> <4FD7CA24.6080405@gentoo.org> <e81ec0a76e5244a99ac2a8e5d26c382d@HUBCAS2.cs.stonybrook.edu> <4FD8DD76.4080001@gentoo.org>
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Thanks for the information -- I got scared by "SysV init". This actually does look very nice. -Nathan On 06/13/12 13:35, Richard Yao wrote: > The OpenRC is sysvinit compatible, but it has few of sysvinit's flaws. > It has named runlevels, the presence of an init script does not cause it > to start and it is in my opinion a joy to use. > > I suggest that you try OpenRC before drawing conclusions. You can > install Gentoo FreeBSD in a jail. There are instructions for this on the > Gentoo wiki: > > http://wiki.gentoo.org/wiki/Gentoo_FreeBSD#Howto_run_G.2FFBSD_in_vanilla_FreeBSD.27s_jail > > If you find deficiencies, I am certain that the OpenRC developers would > appreciate feedback regarding them. > > On 06/13/12 10:19, Nathan Whitehorn wrote: >> On 06/12/12 18:00, Richard Yao wrote: >>> On 06/11/12 18:51, Garrett Cooper wrote: >>>> On Mon, Jun 11, 2012 at 3:21 PM, Brandon Falk<bfalk_bsd@brandonfa.lk> wrote: >>>>> 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. >>>> The single process nature of rc is a big part of the problem, as >>>> is the single AP bootup of FreeBSD right before multiuser mode. There >>>> are a number of threads that discuss this (look for parallel rc bootup >>>> or something like that in the current, hacker, and rc archives -- the >>>> most recent discussion was probably 6~9 months ago). >>>> Given past experience, a big part of getting past the parallelized >>>> rc mess would be to make services fail/wait gracefully for all their >>>> resources to come up before proceeding. It's not easy, but it's >>>> possible with enough resources. >>>> HTH, >>>> -Garrett >>>> _______________________________________________ >>>> freebsd-hackers@freebsd.org mailing list >>>> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >>>> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >>> Gentoo FreeBSD shares OpenRC with Gentoo Linux. OpenRC is a BSD 2-clause >>> licensed System V init system replacement that supports parallel boot. >>> Its boot performance is competitive with systemd and Ubuntu's upstart. >>> >>> If FreeBSD's init system is serializing the boot process, it might be >>> worthwhile to consider importing OpenRC. >>> _______________________________________________ >>> freebsd-hackers@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >>> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >> Please don't change any of the user-facing aspects of the RC system. One >> of the things that brought me (and many others I know) to FreeBSD, >> besides working sound, was having an rc.conf that was easy to configure >> instead of the nightmare that is System V init. >> -Nathan >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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