I have no idea what you mean by "cell sizes per core". Certainly not any terminology within OMPI...
On Dec 15, 2010, at 3:47 PM, Vaz, Guilherme wrote: > > Dear all, > > I have a problem with openmpi1.3, ifort+mkl v11.1 in Ubuntu10.04 systems (32 > or 64bit). My code worked in Ubuntu8.04 and works in RedHat based systems, > with slightly different version changes on mkl and ifort. There were no > changes in the source code. > The problem is that the application works for small cell sizes per core, but > not for large cell sizes per core. And it always works for 1 core. > Example: a grid with 1.2Million cells does not work with mpiexec -n 4 > <my_app> but it works with mpiexec -n 32 <my_app>. It seems that there is a > maximum of cell/core. And it works with <my_app>. > > Is this a stack size (or any memory problem)? Should I set the ulimit -s > unlimited not only on my bashrc but also in the ssh environment (and how)? Or > is something else? > Any clues/tips? > > Thanks for any help. > > Gui > > > > > <imagec393d1.JPG><image4c4685.JPG> > dr. ir. Guilherme Vaz > > CFD Researcher > > Research & Development > > > > MARIN > > > > 2, Haagsteeg > E g....@marin.nl P.O. Box 28 T +31 317 49 39 11 > 6700 AA Wageningen F +31 317 49 32 45 > T +31 317 49 33 25 The Netherlands I www.marin.nl > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
