parallel booting init in C - even larger speedup
Olaf van der Spek
olafvdspek at gmail.com
Mon Nov 14 10:26:48 UTC 2005
On 11/14/05, Petter Reinholdtsen <pere at hungry.com> wrote:
> [Olivier Sessink]
> >> I did not measure the boot speed, so I do not know if this speeded up
> >> the boot or not. I hope to get to that soonish.
> >
> > there more programs you start with the same order number, the more
> > speedup you can expect from the parallel start.
>
> Perhaps. That depend on the bottleneck. If there are CPU or IO
> bottlenecks, parallel booting will not speed up the process much. :)
Isn't an IO bottleneck 'solved' by using readahead?
And even without readahead, generating IO requests earlier means the
HDD may be able to serve them in a more efficient order.
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