[Beowulf] Re: the comparison between OpenMP and MPI

Toon Moene toon at moene.indiv.nluug.nl
Mon May 21 12:00:51 PDT 2007

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: 

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