[arch-general] Optimizing boot

[Toyam Cox]

On Tue, Apr 29, 2014 at 7:47 PM, Daniel Micay <danielmicay at gmail.com> wrote:

> On 29/04/14 07:34 PM, Toyam Cox wrote:
> > On Tue, Apr 29, 2014 at 7:20 PM, Simon Brand
> > <simon.brand at postadigitale.de>wrote:
> >
> >>
> >>
> >> Am 30.04.2014 00:06, schrieb Toyam Cox:
> >>> NetworkManager.service is running for 12 seconds
> >>
> >> Can you use static ip address in your network?
> >> The dhcp client did eat a lot of time here, too.
> >> 9 sec boot here without cryptsetup and static ip.
> >> Server needs 20 sec without ssd, 15 sec for dhcpcd, mysql and php-fpm
> >>
> >>
> > I do not believe that would help, because often I start up in areas
> without
> > a network. Perhaps there is a way to get Network Manager to start after
> the
> > boot is completed, or at least not be a boot dependency?
>
> NetworkManager works fine with roaming and can be configured to use a
> static IP on some networks but not others. I don't see what you have to
> gain by removing it from the regular boot process... just make sure
> you're not letting stuff block on it.
>
> This is with NetworkManager enabled on a wireless network with a Samsung
> 840 EVO (it varies from ~2-3s for kernel + userspace):
>
> Startup finished in 3.070s (firmware) + 60ms (loader) + 1.655s (kernel)
> + 676ms (userspace)
>
> 160ms NetworkManager.service
>
> AFAIK it doesn't count the time needed to connect over DHCP... it's
> often not connected by the time I have a browser and a few terminals
> open in i3 since it takes 10 seconds.
>
> Not that boot time should matter to anyone, since kernel upgrades aren't
> every day and there's not much reason to reboot otherwise :P.
>
>

So something seems to be wrong here.
Startup finished in 4.637s (firmware) + 131ms (loader) + 2.790s (kernel) +
20.066s (userspace) = 27.626s

>12s NetworkManager.service

What sort of things should I check for? Is there an /etc config file I can
play with?

-- 
- Toyam