[Mageia-dev] i686 must be Pentium II ?

Sun Sep 26 19:16:49 CEST 2010

On Sun, Sep 26, 2010 at 7:05 AM, Thomas Backlund <tmb at iki.fi> wrote:
+
+(...)
+
+> So, where does that leave us?
+>
+> Simple.
+> For 32bit installs, we will still support i586 as base.
+> For 64bit installs, it's simple as x86_64 is SSE2 by default.
+
+(...)
+
+> And many of the users wanting i686/sse2 already have hardware capable of
+> running x86_64, so that's what they should do, as there is where the future
+> is.
+
+I've been reading this thread all along, and this is the most sensible option:
+
+* leave i586 for 32-bit CPUs
+* if you want real change, use 64 bit x86_64
+
+This is the only realistic target for compilers.
+
+The differences between i586 vs i686 vs using SSE or SSE2 or.....
+leaves out of Mageia way too many supported CPUs, with no clear
+advantage in performance with the new compiler target.
+
+For a real difference, go 64 bits and that's it.
+
+I remember a review made before 64bits compilers that uncovered that:
+
+i586 was noticeable faster than i386
+i686 made no real difference to i586
+Gentoo laser-precission target made no real difference to i586
+
+
+Salut,
+Sinner
+-- 
+Sinner from the Prairy - http://sinnerbofh.blogspot.com/ -
+http://www.ibiblio.org/sinner/
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+