Daniel Baumann wrote:
As a first step, I'd like to gather a list of features (not their
implementation!,
- Timestamps in /var/log/debug.log (much more an initramfs-tools issue
than a live-initramfs issue !)
Discussion:
I use this patch in /usr/share/initramfs-tools/scripts/functions:
_log_msg()
{
if [ "$quiet" = "y" ]; then return; fi
- grep now /proc/sched_debug
echo "$@"
}
For my Ubuntu 9.10/casper (built using lh-helper !) I can use the
computer 45s after starting the boot-loader. Timing is approximatively
- loading kernel and initrd (not accounted for)
- kernel : 4s
- waiting for USB to show-up 5s
- mounting aufs stack 1s
- casper-bottom: 15s
- starting real system: less than 20s
I discovered that the more time hungry scripts in casper-bottom are
for finishing the job that should have been done at lh_helper time,
when building liveSystem. This is not so an issue with
Debian/Lenny/Live-helper/live-initramfs: it seems that all stuff that
can be avoided at boot time is done at Live-helper time.
By the way, live_helper is so fine that some ones may want to use it to
make all fine tuning in it and remove all flexibility from
live-initramfs in order to speed up boot time.
Ph.L.
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