Hi Cristobal, Note that the pic in http://dl.dropbox.com/u/6380744/clusterLibs.png shows that Scalapack is based on what; it only shows which packages Scalapack uses; hence no OpenMP is there.
Also be clear about the difference: "OpenMP" is for shared memory parallel programming, while "OpenMPI" is an implantation of MPI standard (this list is about OpenMPI obviously). best AA. On Thu, Jul 22, 2010 at 5:06 PM, Cristobal Navarro <axisch...@gmail.com>wrote: > Thanks > > im looking at the manual, seems good. > i think now the picture is more clear. > > i have a very custom algorithm, local problem of research, > paralelizable, thats where openMPI enters. > then, at some point on the program, all the computation traduces to > numeric (double) matrix operations, eigenvalues and derivatives. thats > where a library like PETSc makes its appearance. or a lower level > solution would be GSL and manually implement paralelism with MPI. > > in case someone chooses, a highlevel library like PETSc and some low > level openMPI for its custom algorithms, is there a race for MPI > problem? > > On Thu, Jul 22, 2010 at 3:42 PM, Gus Correa <g...@ldeo.columbia.edu> wrote: > > Hi Cristobal > > > > You may want to take a look at PETSc, > > which has all the machinery for linear algebra that > > you need, can easily attach a variety of Linear Algebra packages, > > including those in the diagram you sent and more, > > builds on top of MPI, and can even build MPI for you, if you prefer. > > It has C and Fortran interfaces, and if I remember right, > > you can build it alternatively with a C++ interface. > > You can choose from real or complex scalars, > > depending on your target problem (e.g. if you are going to do > > signal/image processing with FFTs, you want complex scalars). > > I don't know if it has high level commands to deal with > > data structures (like trees that you mentioned), but it may. > > > > http://www.mcs.anl.gov/petsc/petsc-as/ > > > > My $0.02 > > Gus Correa > > --------------------------------------------------------------------- > > Gustavo Correa > > Lamont-Doherty Earth Observatory - Columbia University > > Palisades, NY, 10964-8000 - USA > > --------------------------------------------------------------------- > > > > Cristobal Navarro wrote: > >> > >> Hello, > >> > >> i am designing a solution to one of my programs, which mixes some tree > >> generation, matrix operatons, eigenvaluies, among other tasks. > >> i have to paralellize all of this for a cluster of 4 nodes (32 cores), > >> and what i first thought was MPI as a blind choice, but after looking > >> at this picture > >> > >> http://dl.dropbox.com/u/6380744/clusterLibs.png ( On the picture, > >> openMP is missing.) > >> > >> i decided to take a break and sit down, think what best suits to my > needs. > >> Adittionally, i am not familiar with Fortran, so i search for C/C++ > >> libraries. > >> > >> what are your experiences, what aspects of your proyect do you > >> consider when choosing, is a good practice to mix these libraries in > >> one same proyect? > >> _______________________________________________ > >> users mailing list > >> us...@open-mpi.org > >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
