On Wed, 17 Dec 2008 21:52:30 +0200
Ville Skyttä <ville.skytta(a)iki.fi> wrote:
On Wednesday 17 December 2008, Arjan van de Ven wrote:
> On Tue, 16 Dec 2008 17:16:36 -0500 (EST)
>
> Seth Vidal <skvidal(a)fedoraproject.org> wrote:
> > > Or hibernate?
> >
> > At least on my system hibernate takes as much time as a reboot.
>
> btw this is a very fundamental property of hibernate. You need to
> do all disk IO to get the system state to disk. And then at resume,
> you need to do all disk IO to get the state from disk again. That's
> twice ;)
>
> This is compounded by the property that a hibernate tends to flush
> at least half the disk cache (it has to, to get space to work in),
> which you then need to page right back in, so even when you're
> back, the first minute or two sucks badly.
>
> I suspect you will always be able to boot faster than you can
> hibernate+resume.
I have very different experience. For example comparable (from grub
going away to KDE + my bunch of default apps running and usable)
numbers just taken from the desktop box in front of which I'm right
now (AMD64 3200, 2G RAM, SATA, F-9 x86_64 KDE):
- shutdown: 28 sec
- fresh boot: 66 sec
see this is the problem; this can be 5 to 10 seconds, and should be.
that's the point of this discussion
--
Arjan van de Ven Intel Open Source Technology Centre
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