Re: [chrony-dev] Slow bootup with git

[Ed W <lists@xxxxxxxxxxxxxx>]

On 16/04/2012 11:32, Miroslav Lichvar wrote:
> On Mon, Apr 16, 2012 at 02:48:14AM +0100, Ed W wrote:
> > Hi, I have adjusted my boot scripts to use chrony in place of
> > hwclock to set rtc at boot.  However, I note that "chrony -r" takes
> > about 8-10 seconds on my system (which blocks boot).  I haven't
> > re-measured the previous version, but I don't recall this delay.
> >
> > I'm surfing the recent git commits and I presume it's this which
> > changes the timings:
> > http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git;a=commitdiff;h=1d2a0856b40e4cc7638f6878b9cd5891fdefbea6
> Yes, that's the patch. The idea was that you can safely start
> applications sensitive to clock steps after the chronyd foreground
> process exited.
>
> > Could you give some thought as to whether there is some performance
> > improvement could be made here? I would prefer not to revert to
> > hwclock if possible?
> You can start chronyd in background, if you don't care that the
> services started after might see a step in the system clock. I think
> that would be pretty much the same as it was before that commit.

Main difference would be that start-stop-daemon wouldn't see my pid file 
and might assume that startup failed?

Which chunk of code takes 8-10 seconds (on my very slow box) to do the 
RTC stuff?  I guess I'm interested in whether that has any optimisation 
options?

Cheers

Ed W

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