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

[Erik Lindahl]

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)?

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).

Cheers,

Erik