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Re: Changing the default 32-bit x86 arch for Fedora 12 (#2)



On Wed, Jun 17, 2009 at 01:52:26PM -0400, Bill Nottingham wrote:
> - Build all packages for i686 (this requires cmov)

This cuts out AMD Geode ...

and for what ...

> 		P4 2.4Ghz	Athlon 3400+	Core2Duo E6850	Atom N270
> march=i686/	-1.1%		+2.0%		+0.9%		+0.6%
>  mtune=generic
> march=i586/	+0.3%		-0.3%		-0.2%		+1.3%
>  mtune=atom
> march=i686/	-1.5%		+1.2%		+0.5%		+1.7%
>  mtune=atom

This just doesn't look worthwhile at all.

My proposal is that we actually start to 'downgrade' x86, start
compiling for baseline i386, and try to support people running Fedora
on really old hardware, through projects like the Minimal Platform
feature.

Rich.

-- 
Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
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