[mpich-discuss] mpich problem.... net_send: could not write tofd=4, errno = 32

[Rajeev Thakur]

Can't say. You should hopefully get a better error message if you use
MPICH2.
 
Rajeev


  _____  

From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Luís Miranda
Sent: Wednesday, February 04, 2009 11:30 AM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] mpich problem.... net_send: could not write
tofd=4, errno = 32


 Could it possible be anything related with network. I'm running this on a
cluster...


2009/2/4 Rajeev Thakur <thakur at mcs.anl.gov>


Your code looks innocuous enough. Not sure why it should fail. I would
suggest using MPICH2 instead of MPICH-1. MPICH-1 is an old implementation
that is not actively supported.
 
Rajeev


  _____  


From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Luís Miranda

Sent: Wednesday, February 04, 2009 10:40 AM 

To: mpich-discuss at mcs.anl.gov

Subject: [mpich-discuss] mpich problem.... net_send: could not write to
fd=4,errno = 32





Hi. I'm trying to run this:
 /opt/mpich/gnu/bin/mpirun -v -np 2    -machinefile program

but i get this error:

i'm process 0 de 2...
ROOT:  trying to send message...
p0_26706:  p4_error: interrupt SIGSEGV: 11
Killed by signal 2.
p0_26706: (0.113281) net_send: could not write to fd=4, errno = 32


This is the code:

#include <stdio.h>
#include "mpi.h"


int main(int argc, char **argv){
    
    int message,
        rank,
        size,
        i,
        tag = 0,
        namelen;
    
    char processor_name[MPI_MAX_PROCESSOR_NAME];
        
    MPI_Status status;
    
    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &size);
    
    printf("i'm process %d de %d...\n", rank, size);
    
    MPI_Barrier(MPI_COMM_WORLD);
    
    if(rank == 0){
        message = 1;
        for (i=1; i<size; i++){
            printf("ROOT: trying to send message...\n");
            MPI_Ssend(&message, 1, MPI_INT, i, tag, MPI_COMM_WORLD);        
        }
    }else{
        printf("SLAVE %d: trying to receive message...\n", rank);
        MPI_Get_processor_name(processor_name,&namelen);
        MPI_Recv(&message, 1, MPI_INT, MPI_ANY_SOURCE, tag , MPI_COMM_WORLD,
&status);
        printf("SLAVE %d MAQUINA %s: receive message %d\n ",rank,
processor_name, message);
    }
    
    MPI_Finalize();    
    return 0;
}

And this is my machine file:

beta.something.com
compute-1-0.local
compute-1-1.local
compute-1-2.local

Any solution?


Thank you.




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