Michael wrote:
> 
> On Mon, Mar 04, 2002 at 06:51:10PM +0100, Dieter Nützel wrote:
> > On Monday, 4. März 2002 16:30:33, Thomas Dodd wrote:
> > > Dieter Nützel wrote:
> > > > On Sonntag, 3. März 2002 18:09:18, Gareth Hughes wrote:
> > > >> Dieter Nützel wrote:
> > >
> > > >> > CDEBUGFLAGS = -O -mcpu=k6 -pipe -mpreferred-stack-boundary=2
> > > >> > -malign-functions=4 -fschedule -insns2 -fexpensive-optimizations
> > > >>
> > > >> Hmmm, I'm not really sure that's legal (in terms of having reportable
> > > >> results with a binary compiled like that) :-)
> > > >
> > > > He asked about self compiling...;-)))
> > >
> > > Are these with the default CFLAGS or the K7 optimized?
> >
> > My K7. I found them during "heavy" Mesa testing since 26. August 1999...;-)
> > Running all Linux kernels with them.
> 
> What speedup do you get? I'd have thought that in both cases
> (mesa and kernel) that the biggest gains are already done explicitly,
> with things like 3dnow and fast_copy/clear_page?
> 
> Have you tried gcc-3's --march=athlon?
> 
> (which as an aside intrigued me, is MESA_NO_3DNOW required to run
> veiwperf 'legally'? What exactly is cheating about such general purpose
> optimisations like mcpu=k6?)

I don't really see it as cheating either.  I'm sure that when compaq runs it
on alpha they use uptodate instruction sets, likewise for Sun on sparc.  

Keith

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