Date: Sun, 21 Aug 2011 20:13:59 +0200 From: kilian <kklimek@uos.de> To: freebsd-hackers@freebsd.org Subject: Re: Concurrent execution of rc-scripts with rcorder(8) Message-ID: <20110821181359.GA58700@crane.none> In-Reply-To: <CAPd55qAp0LqK9ysY%2BBwf-hXRTtWqV2SCe8qOow_JXfRDDFDbCw@mail.gmail.com> References: <20110821121509.GA27730@crane.none> <CAPd55qAp0LqK9ysY%2BBwf-hXRTtWqV2SCe8qOow_JXfRDDFDbCw@mail.gmail.com>
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On Sun, Aug 21, 2011 at 04:18:10PM +0200, joris dedieu wrote: > 2011/8/21 kilian <kklimek@uos.de>: > > Hello, > > > > the idea to start services concurrently during boot isn't new and the > > question why FreeBSD doesn't do it has popped up on the forum and > > mailing list occasionally. So, why not give it a shot? > > > > rcorder(8) is normally used during boot to bring the rc-scripts into a > > particular order, so when they are executed linearly by /etc/rc, all > > constraints will be satisfied. I modified rcorder(8) to enable it to > > run rc-scripts concurrently, while keeping track of the constraints as > > rc-scripts start and finish. You can find the code at > > https://github.com/kil/rcorder. As it works now, it will fall back to the > > current mode of execution if anything goes wrong. So, if worst comes to > > worst, booting takes a bit longer. > > > > If you feel brave, give it a try (Actually, not too much bravery is needed: > > on all boots of my machine it worked perfectly every time.) > > > > I haven't done any measurements yet on how large the speedup is, but booting > > feels a bit faster with it. Also, there probably is room for improvement. > > Any ideas and feedback are very welcome! > > There is another implementation which had been posted here (maybe) > some times ago. Maybe a good thing to compare. > > https://github.com/buganini/rcexecr Didn't know someone else already implemented this. I had a (quick) look at the source code and tried it out, too. Seems to do its job quite well. I'm (obviously) biased in my opinion but what might be considered a drawback of the rcexecr implementation is that it requires modifications to some files in /etc/rc.d. The modifications to /etc/rc are also more invasive. rcexecr is a whole new program, based on rcorder. My implementation requires changes only to /etc/rc and adds features to rcorder (preserving compatibility, I might add). - kilian > > Joris > > > > -kilian > > _______________________________________________ > > 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" > > > _______________________________________________ > 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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