The nature of kernel of the FreeBSD

[Julian Elischer]

Eder wrote:

> A doubt,
>
> Kernel of the FreeBSD is monolithic, correct !!!
>
> The MacOS is derived from kernel of the FreeBSD, correct !!!

no, wrong.

The MacOS kernel is "related distantly" to the FreeBSD kernel.
It has been derived from MACH 3 and MACH 2.5  which themselves had SOME 
components
derived from BSD4.3. Some of these components have been updated to the 
equivalent
companents from modern BSD systems and BSD4.4 in turn borrowed the VM system
from MACH. So, they are related but not in a parent/child manner.  MacOS 
has been designed
and evolved with a very different set of goals from FreeBSD, so many 
different tradeoffs
have been made along the way. They have very different behaviour 
characteristics.

>
> It would like to understand because the performance of a MacOS as serving
> it is very inferior of what a FreeBSD server, being that the MacOS is
> derived
> from kernel of the FreeBSD.
>
> It will be that somebody could explain this better to me.
>
> Thanks,
>
> Ederson de Moura