Re: [Xen-devel] early_cpu_init() and identify_cpu()

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 17/7/07 10:58, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>>> That's a win of about 30%, and using movsq in memcpy() is another win of
>>> about 50%. Will probably create a vidmemmove()...
>> 
>> That still totally sucks then. Paging a full screen of text of, say 60
>> lines, done line-by-line will still take, say 60*300ms == 20 seconds(ish).
> 
> No, you got me wrong - with 'scrolling by one line' I mean the scrolling the
> entire screen up by a line. It's about half as fast as Linux during boot now,
> visibly slower post-boot.

Re-draw is going to be the default, even if I have to implement it on top of
your patch. :-)

The fact that dom0 will overwrite Xen's output anyway as it re-draws seems
to make scrolling-as-default the inferior option because it's significantly
slower and can provide benefit really only for crash dumps (where a re-draw
based scheme can work just as well).

So I don't understand your attachment to scrolling.

 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel