[Beowulf] Sempron compile optimization
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Erwan Velu erwan at seanodes.comWed Nov 23 13:04:01 PST 2005
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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? > You must be careful, the sempron product line owns some x86 and some x86_64 processors ! Mine is a pure x86 so trying to use some x86_64 code will fails. Have a look at http://www.amdcompare.com/us-en/desktop/Default.aspx to find what your processor is. Erwan,
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