[gmx-users] ibm regatta p690 (power4) / illegal instruction
spoel at xray.bmc.uu.se
Wed Nov 27 07:01:15 CET 2002
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.
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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