[Wien] Wrong compiling option ?

[zhao]

Dear Stefaan,

   Thank you very much for your suggestion. The essl library do speed up
my computation.


Zhao 
在 2007-09-30日的 09:49 +0200，Stefaan Cottenier写道：
> That's probably normal. Check the wien2k benchmark page at  
> http://www.wien2k.at/reg_user/benchmark/, where you see e.g.:
> 
> P4D dual-core (820), 3.2 GHz     128 sec    ifort9 + cmkl8.0 OMP_NUM_THREADS=2
> IBM p655 1.50GHz Power4+         206 sec    xlf 8.1.1,-q64 -O5,ESSL4.1
> 
> That's not yet the factor 4 you have, but probably the two above ones  
> are not exactly your machines either. Did you link with the essl  
> library on your IBM? If not, that could speed up quite a bit.
> 
> Stefaan
> 
> 
> Quoting zhao <yongh_zhao518 at 163.com>:
> 
> > Dear Peter Blaha:
> >
> >    I have compiled wien2k_0703 on an ibm machine(power 4; aix; xlf90)
> > and a cluster(Intel(R) Pentium(R) D CPU 3.40GHz; suse 10; ifort).I found
> > that the ibm machines consume more than four times computing time to
> > accomplish the same work than my cluster. I wonder if this is a normal
> > phenomenon, or I have use the wrong compiling option on the ibm machine.
> > Next I give my compiling options on the ibm machine.
> >
> > -------------------------------------------------
> > -------------------------------------------------
> > Current settings:
> >  O   Compiler options:        -O -q64 -qmaxmem=-1
> >  L   Linker Flags:            -L../SRC_lib -q64
> >  P   Preprocessor flags       '-WF,-DParallel'
> >  R   R_LIB (LAPACK
> > +BLAS):     /usr/lib/liblapack64.a /usr/lib/libblas64.a -qipa
> > ---------------------------------------------------
> > ---------------------------------------------------
> >
> > Thank you very much.
> >
> > Sincerely
> >
> > Yonghong Zhao
> >
> >
> > _______________________________________________
> > Wien mailing list
> > Wien at zeus.theochem.tuwien.ac.at
> > http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
> >
> >
> 
> 
>