processor type.

[Wilko Bulte]

On Fri, Jan 14, 2005 at 02:25:07PM -0500, John Baldwin wrote..
> On Friday 14 January 2005 01:26 pm, Wilko Bulte wrote:
> > On Fri, Jan 14, 2005 at 10:43:00AM -0500, John Baldwin wrote..
> >
> > > On Friday 14 January 2005 02:43 am, Wilko Bulte wrote:
> > > > On Thu, Jan 13, 2005 at 04:26:51PM -0800, David O'Brien wrote..
> > > >
> > > > > On Mon, Jan 10, 2005 at 08:16:06AM -0500, David Gilbert wrote:
> > > > > > I see in the compiler lines crawling by that gcc is asked to
> > > > > > optimize for 'EV5' while being compatible with 'EV4'.  My Alpha is
> > > > > > an EV4 --- I'm wondering if I would see better performance with a
> > > > > > different flag there, but the gcc manual doesn't even acknowledge

[snip]

> > I sort of expect the settings in /etc/make.conf to only apply to building
> > world and not to building release. Correct?
> 
> Yes, a release is built in a "clean-room" chroot where make.conf doesn't 
> affect what happens.  In that case, the default values quoted at the top of 

AH, of course.. silly me.

> this thread are used (tune for an ev5, but only use instructions on an ev4).  
> The idea is that the GENERIC kernel for a release should be optimized to run 
> on "common" machines while still supporting older models.  There's certainly 
> no harm in bumping the default -mtune to ev6 if we feel that most Alpha users 
> are ev6 rather than ev5.

Hm, I suppose I could do this in HEAD. 

I'll run an experiment with a worldstone built using an ev5 world and compare
that to a worldstone built using an ev6 world.  Stay tuned.

-- 
Wilko Bulte				wilko at FreeBSD.org