[mpich-discuss] (mpich2nemesis.dl

[Junchao Zhang]

You need to use disp[]
<     MPI_Scatterv(&a, rcounts, 0, MPI_INT, &b, 100, MPI_INT, 0,
MPI_COMM_WORLD);
---
>     MPI_Scatterv(&a, rcounts, disp, MPI_INT, &b, 100, MPI_INT, 0,
MPI_COMM_WORLD);

--Junchao Zhang

On Wed, Nov 12, 2014 at 5:23 AM, Chafik sanaa <san.chafik at gmail.com> wrote:

> when i running the following program, i have this error (Exception non
> gérée à 0x00B54BE2 (mpich2nemesis.dll) dans samedi1.exe : 0xC0000005 :
> Violation d'accès lors de la lecture de l'emplacement 0x00000000.)
> program :
> #include <stdio.h>
> #include "mpi.h"
>
> int main(int argc, char *argv[])
> {
>
> int a[8] = { 1, 2, 3, 4, 5, 6, 7, 8 };
> int rcounts[4] = { 2, 2, 2, 2 };
> int disp[4] = { 0, 2, 4, 6 };
> int b[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
> int procid;
> MPI_Init(&argc, &argv);
> MPI_Comm_rank(MPI_COMM_WORLD, &procid);
>  MPI_Scatterv(&a, rcounts, 0, MPI_INT, &b, 100, MPI_INT, 0,
> MPI_COMM_WORLD);
> printf("%d", b[0]);
> printf("sanaa");
> MPI_Finalize();
> return 0;
> }
>
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