[gmx-users] ibm regatta p690 (power4) / illegal instruction

[David]

On Tue, 2002-11-26 at 17:33, Erik Lindahl wrote:
> 
> 
> Erik Wensink wrote:
> 
> >
> > Hi all,
> >
> > Trying to launch a pme job on an ibm regatta p690 (power4).
> > That ends like below, same job with cut-off goes OK.
> > Thus something with the fft libs may cause this.
> > Tried to use --enable-threads when compiling fftw,
> > since the load leveler of the machine requires thread safe compilaiton,
> > but this gave no relieve. Anyone dealt with this problem?
> >
> > best regards,
> > Erik
> 
> 
> Hmm.... check the compiler flags used for FFTW; are they for some 
> special power generation
> (like pwr2)?
> 
I think it actually compiles for power4, but the FFTW tests run, even in
parallel. We'll try to debug it today.

> You don't need to enable threads; non-threaded code is threadsafe! (And 
> the next generation
> of Gromacs will handle threads above the FFTW level).
> 
For some reason the load leveller on that machine is configured such
that it is necessary to compile with the threaded MPI library, otherwise
programs will not run.

-- 
Groeten, David.
________________________________________________________________________
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://zorn.bmc.uu.se/~spoel
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