Date: Tue, 23 Aug 2011 22:18:59 +0200 From: kilian <kklimek@uos.de> To: freebsd-hackers@freebsd.org, freebsd-rc@freebsd.org Subject: Re: Concurrent execution of rc-scripts with rcorder(8) Message-ID: <20110823201859.GA78110@crane.none> In-Reply-To: <CADLo83_=jQoNK5dm4QWCLRWNRzu-NLZeAsxaqexm1hKXFpdh7g@mail.gmail.com> References: <20110821121509.GA27730@crane.none> <CADLo83_=jQoNK5dm4QWCLRWNRzu-NLZeAsxaqexm1hKXFpdh7g@mail.gmail.com>
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On Sun, Aug 21, 2011 at 02:54:15PM +0100, Chris Rees wrote: > On 21 Aug 2011 13:39, "kilian" <kklimek@uos.de> wrote: > > > > 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! > > > > -kilian > > > > I might suggest moving this to rc@. I'll try it later, looks interesting. > > Chris For anyone who is interested, updated the README[1] with some numbers, detailing the influence on booting time. [1] https://github.com/kil/rcorder/blob/master/README#L30
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