[Beowulf] Sempron compile optimization
Robert G. Brown
rgb at phy.duke.edu
Wed Nov 23 09:39:41 EST 2005
On Wed, 23 Nov 2005, Alan Ward wrote:
> Hello everybody.
> Since 64-bit CPU architecture is cheap these days in a Semperon (3000+ version), I've been trying to optimize some of my C code. As for compile switches on the gcc, do
> -march=x86-64 -mfpmath=sse -m3dnow
> look reasonable? Any reason why the -m64 switch does not work for me?
I don't think the -m switches have done much for some time now. But I
could be wrong. I think they may even be deprecated. Check the primary
compiler docs or compiler developer website.
> Best regards,
> Alan Ward
Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb at phy.duke.edu
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