[Beowulf] Athlon64 / Opteron test

[Mikhail Kuzminsky]

According to Joe Griffin
> 
>  ... 
> Below is a web site comparing IA32, IA64 (linux and HPUX),  Opteron
> and an IBM P655 running AIX.   The site should only be used to
> compare hardare platforms when running our software.   I am sure
> that Fluent, LSTC/Dyna, Star-CD have similar sites.  I recomend
> finding out about the software that you will be using.
> 
> MSC.Nastran Hardware comparison:
> 
> http://www.mscsoftware.com/support/prod_support/nastran/performance/v04_sngl.cfm
> 
> Regards,
> Joe Griffin
> 
  This page contains very interesting tables w/description of hardware
used, but at first look I found only the data about OSes, not about compilers/run time libraries used. The (relative bad) data for IBM e325/Opteron 2 Ghz
looks "nontrivial"; I beleive some interptretation of "why?" will be helpful.
May be some applications used are relative cache-friendly and have working set
placing in large Itanium 2 cache? 

May be it depends from compiler and Math library used ? BTW, for LGQDF test:
I/O is relative small (compare pls elapsed and CPU times which are very close);
but Windows time for Dell P4/3.2 Ghz (4480 sec) is much more worse than
for Linux on the same hardware (3713 sec). IMHO, in this case they
 must be very close in the case of using same comlilers&libraries
 (I don't like Windows, but this result is too bad for this OS :-))

Yours
Mikhail Kuzminsky
Zelinsky Institute of Organic Chemistry
Moscow