[Wien] Wrong compiling option ?

[Stefaan Cottenier]

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
>
>



-- 
Stefaan Cottenier
Instituut voor Kern- en Stralingsfysica
K.U.Leuven
Celestijnenlaan 200 D
B-3001 Leuven (Belgium)

tel: + 32 16 32 71 45
fax: + 32 16 32 79 85
e-mail: stefaan.cottenier at fys.kuleuven.be


Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm