Hello Riccardo, I basically have to implement a 4D vector. An additional goal of my project is to support char, int, float and double datatypes in the vector. I figured that the only way to do this is through a template. Up to this point I was only supporting doubles in my vector, and I was sending each element individually from node to node. Since MPI_Send and MPI_Recv require the programmer to specify which datatype to use, and since I would only use doubles in the initial version of my project, using MPI_Send and MPI_Recv was easy. However if I am to declare my 4D vector like this std::vector<T> , there will be no way for me to know which datatype to specify in the MPI_Send and MPI_Recv commands.
No I haven't looked at Boost.MPI . I did a quick Ctrl-F of Boost.MPI in the MPI 2.2 doc that i found here: http://www.mpi-forum.org/docs/docs.html , but i was unable to find it. Could you point me to some resources about it? It would be a lot easier to use that rather than send every element 1 by 1. Thank you very much for your help. Alex On Mon, Aug 9, 2010 at 4:09 PM, Riccardo Murri <riccardo.mu...@gmail.com>wrote: > Hello Alexandru, > > On Mon, Aug 9, 2010 at 6:05 PM, Alexandru Blidaru <alexs...@gmail.com> > wrote: > > I have to send some vectors from node to node, and the vecotrs are built > > using a template. The datatypes used in the template will be long, int, > > double, and char. How may I send those vectors since I wouldn't know what > > MPI datatype i have to specify in MPI_Send and MPI Recv. Is there any way > to > > do this? > > > > I'm not sure I understand what your question is about: are you asking > what MPI datatypes you should use to send C types "long", "int", etc., > or are you trying to send a more complex C type ("vector")? > Can you send some code demonstrating the problem you are trying to solve? > > Besides, your wording suggests that you are trying to send a C++ > std::vector<T> over MPI: have you already had a look at Boost.MPI? It > has out-of-the-box support for STL containers. > > Cheers, > Riccardo > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > -- Alexandru Blidaru University of Waterloo - Electrical Engineering '15 University email: asbli...@uwaterloo.ca Twitter handle: @G_raph Blog: http://alexblidaru.wordpress.com/
