* Nathan Zimmer <nzim...@sgi.com> wrote:
> On Sun, Jun 23, 2013 at 11:28:40AM +0200, Ingo Molnar wrote:
> >
> > That's 4.5 GB/sec initialization speed - that feels a bit slow and the
> > boot time effect should be felt on smaller 'a couple of gigabytes'
> > desktop boxes as well. Do we know exactly where the 2 hours of boot
> > time on a 32 TB system is spent?
>
> There are other several spots that could be improved on a large system
> but memory initialization is by far the biggest.
My feeling is that deferred/on-demand initialization triggered from the
buddy allocator is the better long term solution.
That will also make it much easier to profile/test memory init
performance: boot up a large system and run a simple testprogram that
allocates a lot of RAM.
( It will also make people want to optimize the initialization sequence
better, as it will be part of any freshly booted system's memory
allocation overhead. )
Thanks,
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
