[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

RE: All packages i686 better performance than i386? [was RE: Kickstart-list digest, Vol 1 #359 - 13 msgs]



> Many thanks for this help.
> Do you know if this also works if you replace i386 packages with
> recompiled i686 ones? If so has anyone actually benchmarked a system
> with a standard install vs the same packages recomiled to i686. 
> The reason I ask is that my requirement for linux is for intensive
> number crunching and so to get a 5% to 10% performance 
> increase would be
> sufficient justification for recompiling - on the other hand 
> no good if
> you can't kickstart from it.
> cheers
>  
> -- 
> Geoff Dolman
> JDRF/WT Diabetes and Inflammation Laboratory
> Cambridge Institute for Medical Research
> University of Cambridge
> http://www-gene.cimr.cam.ac.uk/todd/

You can replace the i386 packages with i686 packages, but I have never seen
any benchmarks that test the difference in speed.  Red Hat uses -march=i386
-mcpu=i686, so a lot of the optimization is already there.  You might also
try using gcc3 or Intel's compiler (icc) to recompile the programs that you
use, and benchmark them.

Forrest





[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]