On Thu, Apr 24, 2008 at 08:25:44AM -0400, Alberto Giannetti wrote: > > I am using one of the nodes as a desktop computer. Therefore it is > > most important for me that the mpi program is not so greedily > > acquiring cpu time.
> From a performance/usability stand, you could set interactive > applications on higher priority to guarantee your desktop > applications work as expected. What you really mean is to renice the MPI program to 10 or even 19. It's usually not a good idea to raise the priority of any program below 0, as this could lock up your machine (that's why nice-levels below 0 are reserved for privileged users (root)) (note that lower nice levels actually mean higher priority. Just to avoid confusion. I guess I don't have to mention "man nice" on a technical mailing list.) Anyway, I suggest you set mpi_yield_when_idle=1 in your mca-params.conf. -- Cluster and Metacomputing Working Group Friedrich-Schiller-Universität Jena, Germany private: http://adi.thur.de
