FC3 and Pentium 4 optimization?

Satish Balay balay at fastmail.fm
Fri Jan 7 19:35:48 UTC 2005

On Fri, 7 Jan 2005, Steve Bergman wrote:

> I am seeking clarification of a point made in the release notes.  It states
> that FC3 is optimized for Pentium 4.  However the kernels and glibc available
> are labeled as i686 and i386.  I assume, since Pentium 1 is the minimum
> hardware requirement, that the instruction set used is Pentium 1.  So:
> 1. What optimization and instruction set are the general packages actually
> compiled with?
> 2. What optimization and instruction set are glibc-i686 and  kernel-i686
> compiled with? (I seem to recall that the kernel is now optimized for size.)
> 3. How important is this to someone running a different processor? (Say Athlon
> XP.) IIRC p4 has very specific optimization requirements.

Plenty of mails on this topic in the fedora-devel-list archives. You might
want to check there..

The FC3 .i386 rpms are built with

-O2 -g -pipe -m32 -march=i386 -mtune=pentium4


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