how to compiel kernel and world to maxium optimization

[Erik Trulsson]

On Fri, Oct 12, 2007 at 02:02:09PM +0400, Artem Kuchin wrote:
> Hello!
> 
> Somehow, i cannot find info now how to build kernel and world
> very optimized to a particular machine. Maybe i am not looking
> hard enough?
> 
> The point is that if i have Xeon HT cpus (not very new, but
> definitelly not Pentium PRO :) i can build kernel and world
> using insttructions for this CPU and optimization for it, so
> i would get myself a speedy system and less memory hungry, right?
> 
> The only option known to me which is related to the isee is cpu
> setting in kernel config file. Anything else?
> 
> Thank you very much in advance


You can set CPUTYPE in /etc/make.conf to have the compiler do some
CPU-specific optimizations.

You can also set CFLAGS/COPTFLAGS  (for world/kernel) in /etc/make.conf
to whatever flags the compiler supports.
Don't complain if anything breaks though - you are only supposed to
touch those flags if you know what you are doing.


Don't expect any major (or even noticable) improvements from these settings
though.



-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013 at student.uu.se