Hi Raymond, Raymond wrote:
> > Hi Heitor, > > > Heitor Florido wrote: > > I have installed OpenMPI on both computers and my application works on on > > both of them, but when I try to communicate between them, the method > > MPI_Lookup_name can't resolve the name published by the other machine. > > > > I've tried to run the example from mpi-forum that uses MPI_Open_port too, > > but it didn't work either. > > After reading about it on some FAQs e some other threads from the forum, > I > > believe that I need to config my ssh options. > > > > > > Honestly, when I installed Open MPI, I didn't perform any configuration > of the ssh options, as far as I can remember. I'm not sure if someone > else can help you. I can imagine networks being set up incorrectly, but > I can't imagine what incorrect ssh option there would be to prevent one > computer from finding another. In addition to some FAQs, Gus suggested > running a simple example called hello_c.c. Have you tried that? > Yes, I've tried to execute hello_c.c and it worked fine. Here's the outcome : heitor@heitor-desktop:~/Desktop/untitled folder$ mpiexec -n 3 hello Hello, world, I am 1 of 3 Hello, world, I am 0 of 3 Hello, world, I am 2 of 3 It might help if you ran some existing code > (such as http://mpi.deino.net/mpi_functions/MPI_Lookup_name.html), too. > > Ray > I've executed the code example from http://mpi.deino.net/mpi_functions/MPI_Lookup_name.html and it didn't wrote anything on the terminal. Reading the code I've realized that it shouldn't be any printf. I believe that's OK. <http://mpi.deino.net/mpi_functions/MPI_Lookup_name.html> > > > It is hard to give any suggestions unless you give more information such > as a shortened version of your source code and what is the command line > that you ran mpirun with. Here's some pieces of my code: Server: void Servidor::iniciaServidor(){ bool sair = false; int valorRecebido, valorEnviado; MPI_Status s; char porta[MPI_MAX_PORT_NAME]; char nomeServico[25]; strcpy (nomeServico,"GEAR-TRAINING_CENTER" ); MPI_Open_port(MPI_INFO_NULL, porta); MPI_Publish_name(nomeServico, MPI_INFO_NULL, porta); printf ("%s\n", porta); while (true){ MPI_Comm_accept(porta, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &comunicadorInterface); printf ("Conexao aceitada!\n"); ... } Client: void InterfaceUsuario::conectaServidor (){ char porta[MPI_MAX_PORT_NAME]; char nomeServico[25]; strcpy (nomeServico, "GEAR-TRAINING_CENTER"); MPI_Lookup_name(nomeServico, MPI_INFO_NULL, porta); MPI_Comm_connect( porta, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &this->comunicadorServidor ); } If you need the rest of the code, just tell me and I will post it. :D []s Heitor
