processor type.

[Wilko Bulte]

On Sat, Jan 15, 2005 at 10:06:05AM +0100, Bernd Walter wrote..
> On Sat, Jan 15, 2005 at 09:40:53AM +0100, Wilko Bulte wrote:
> > On Fri, Jan 14, 2005 at 11:45:23PM +0100, Wilko Bulte wrote..
> > > NO_CPU_COPTFLAGS=true   # Don't add -march=<cpu> to COPTFLAGS automatically
> > > 
> > > fixes it on RELENG_4
> > 
> > Well, the elapsed wall clock time for a buildworld running an ev5 world
> > versus running an ev6 world is only roughly 2 or 3 minutes in favor of a ev6
> > world on a elapsed time of roughly 75 minutes. This is on a DS10 600MHz 
> > 
> > Not too interesting in my book
> 
> I wonder if the build environment was compiled using those flags too or
> just the resulting binaries.

To clarify:  my tests were 'make buildworlds'.  The first number was while
building running a EV5 optimised world to do so, the second used the EV6
world.

I have not tried to build an EV5 buildworld using the EV6 world
(so in other words an empty /etc/make.conf).  The machine is currently
churning on RC3 for re@ so I cannot go try it.

> One should also consider that compiling binaries with more optimization
> usually takes additional cycles too.

True.

> I wouldn't have been surprised if the result would have been taken
> longer also the binaries were faster.

That one would hope yes.

-- 
Wilko Bulte				wilko at FreeBSD.org