Thank you and this makes sense. In fact we've been trying to avoid serialization as much as possible because we found it to be a bottleneck.
Anyway I wonder if there are some samples illustrating the use of complex structures in OpenMPI Thank you, Saliya On Jan 17, 2014 5:20 PM, "Oscar Vega-Gisbert" <ov...@dsic.upv.es> wrote: > MPI.OBJECT is no longer supported because of it was based on > serialization, and it made the java bindings more complicated. It brought > more problems than benefits. For example, it was necessary a shadow > communicator... > > You can define complex struct data using direct buffers and avoiding > serialization. MPI.OBJECT could be implemented in a higher level layer, but > serialization is very bad for performance... > > Regards, > Oscar > > Quoting Saliya Ekanayake <esal...@gmail.com>: > > Thank you Oscar. I was using an earlier nightly tarball and in it there >> was >> MPI.OBJECT datatype, which I could use with any serializable complex >> object. It seems this is no longer supported as per your answer or did I >> get it wrong? >> >> Thank you, >> Saliya >> >> >> On Thu, Jan 16, 2014 at 5:22 PM, Oscar Vega-Gisbert <ov...@dsic.upv.es >> >wrote: >> >> Hi, >>> >>> If you are talking about types as ArrayList<Double>, it is not possible, >>> because the Double (D uppercase) is an object which encapsulates a >>> double. >>> And the elements of an ArrayList are references (pointers) to Java >>> objects. >>> >>> You can use complex types but you must create them with the Datatype >>> methods (createVector, createStruct,...). And the buffers that hold the >>> data must be arrays of a primitive type or direct buffers. >>> >>> Regards, >>> Oscar >>> >>> >>> Quoting Saliya Ekanayake <esal...@gmail.com>: >>> >>> Hi, >>> >>>> >>>> Is it possible to use non-primitive types with MPI operations in >>>> OpenMPI's >>>> Java binding? At the moment in the trunk I only see Datatypes for >>>> primitive >>>> kinds. >>>> >>>> Thank you, >>>> Saliya >>>> >>>> -- >>>> Saliya Ekanayake esal...@gmail.com >>>> >>>> >>>> >>> >>> ---------------------------------------------------------------- >>> This message was sent using IMP, the Internet Messaging Program. >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >> >> >> -- >> Saliya Ekanayake esal...@gmail.com >> Cell 812-391-4914 Home 812-961-6383 >> http://saliya.org >> >> > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
