On Sun, 06 Jul 2008 10:29:20 +0100 Andy Green <andy@openmoko.com> babbled:

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> Somebody in the thread at some point said:
> | after collect informations, we can sum up the most important issues for
> | boot time:
> 
> Hey bootchart is really good step to understand and measure the real
> issues, nice work.
> 
> | 1. initializing kernel(9 secs)
> 
> What actually does that, JFFS2 mount?  I use ext2 on SD card, there is
> no 9 second delay there.

i think so - jffs2 and flash IO. our flash is abysmally slow. i am amazed how
slow it is... is there something perhaps wrong with how we drive it?

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> | 2. initializing boot splash (exquisite/exquisite-write)  (8 secs)
> | 3. udev (udev/udevd) (29 secs)
> 
> mdev on busybox is possible replacement.
> 
> | 4. updating dynamic library cache will waste a lot of time (ldconfig)
> | (18secs)
> 
> I already mentioned this some weeks ago, I took it out on the DM2 boot
> here and it makes a big difference.  And most of the time, it is doing
> nothing at all.
> 
> - -Andy
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-- 
Carsten Haitzler (The Rasterman) <raster@openmoko.org>