Changing CFLAGS for i386 packages on x86_64 (benchmarks included)
davej at redhat.com
Sun Jul 16 12:15:46 UTC 2006
On Sun, Jul 16, 2006 at 02:10:22PM +0200, dragoran wrote:
> I did same benchmarks using flops.c (attached) the results are attached
> to it seems that
> -march=k8 -mtune=k8 -m32 is the fastes but not by much ...
> the last one (-m64) is weird (much slower!!) no -OX was used.
If you were running a recent kernel from rawhide, you may want
to re-run these tests, as there was an fpu optimisation in there
that may have been responsible for spurious sigfpe's that some
apps have been getting. If that patch was to blame, then it's
possible there may have been other side-effects.
Todays rawhide has it reverted.
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