[Wien] ifort (ifc) 8.0 and mkl 6.1

Peter Blaha pblaha at zeus.theochem.tuwien.ac.at
Wed Jun 9 14:55:07 CEST 2004


> I have some problems with compiling wien2k with ifort8.0.
> We use a 3.2 GHz P4, 512kB L2 with 400MHz. Compiling with ifc7.1 and mkl6.1
> works fine, but the time we reach for the benchmark is 270s, while 228s
> should be possible with ifort8.0 instead of ifc7.1.

I doubt that the differences in speed are due to the compiler. Most likely
they come from the mkl library. Are you sure you use mkl 6.1 ?
There is quite a difference between those two libraries (the newer mkl
should be as good as the "gotolib".

I don't like (use) ifort8.0


                                      P.Blaha
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Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
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