openmp, Intel Fortran compiler 11.0 mkl library, Rocks 5.1

[mittelmann__renate]

We run a Rocks quad core cluster, Rocks 5.1 with the Intel roll 11.0, and Infiniband

We can compile our programs and they run fine with up to 8 threads.

But as soon as we want to increase the number of threads the program aborts without any error message.

I assume the mkl stacksize limit or ulimit or some other stacksize default parameter needs to be changed.

Can someone give me a hint?

Renate

[TimP]

You touch on several apparently separate issues at once. MKL is unlikely to benefit from more than 1 thread per core. Are you running mkl sequential library, using ifort openmp for threading?
You would be running under MPI in order to run across multiple nodes, if you are counting an aggregate number of threads on the cluster. There is a forum section for MKL, and one for clusters and HPC, in case you could be specific about what questions you may have in those areas.