[Beowulf] Re: the comparison between OpenMP and MPI

[Toon Moene]

Florent Calvayrac wrote:

> Without optimization no registers were used so the code was giving
> correct results and at O1 code was optimized on a line per line basis
> and not procedure-wide.
> 
> So even commercial code can be wrong...

As a former boss of mine put it, some 25 years ago:  "You think the 
compiler is perfect ?   Hah, it's just another large program with its 
own bugs !"

-- 
Toon Moene - e-mail: toon at moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.indiv.nluug.nl/~toon/
Who's working on GNU Fortran: 
http://gcc.gnu.org/ml/gcc/2007-01/msg00059.html