Re: 7.0_RC1 slow boot

[Arto Huusko <armihu%gmail.com@localhost>]

On 12.07.2015 21:02, Martin Husemann wrote:
> On Sun, Jul 12, 2015 at 08:47:13PM +0300, Arto Huusko wrote:
> > I also tested 7.99.19, and it is just as slow to boot as 7.0_RC1, and
> > vmstat numbers are pretty much the same.
>
> See:
> http://mail-index.netbsd.org/tech-userlevel/2015/06/01/msg009153.html

That helped, but only about 1-2 seconds, so with that 7.0_RC1 boot is 43
seconds compared to 11 seconds of 6.1.5. But I looked at other rc
changes in 7.0, and reverting revision 1.94 of etc/rc.subr restored the
boot speed back to the same level as in 6.1.5, and number of forks
dropped back from over 1000 to less than 300.

At a glance the diffs do look like they should not cause any forks, but
maybe someone should take a closer look.

> > In the not very scientific qemu boot time test -current kernel is also
> > unfortunately slightly slower to boot 6.1.5 userland than 6.1.5 or 7.0
> > kernel.
>
> This would be interesting to analyze closer. Sparc is not in the set of
> architectures that switches DIAGNOSTIC off on release branches and on
> again in -current (AFAICT), so this must be something else.

I'll try to see if I can get some more details.

Arto