Maybe not...
I do not remember how Java treats 2dims array (e.g. matrix or array of
array)
at first, you can try
int[][]m = new int [2][3];
and print m.length
it could be 2, 3 or 6 ...
bottom line, you might have to use one send per row, or use a datatype, or
pack and send
Cheers,
Gilles
On Thursday, November 5, 2015, Ibrahim Ikhlawi <ibrahim_...@hotmail.com>
wrote:
> Thanks for the answer.
> Isn't that the same thing by the 2-dim arrays?
> I mean m1.length*m1.length, for example:
> MPI.COMM_WORLD.send(m1, m1.length*m1.length , MPI.INT, 1,
> tag);
> But I get this exception: ArrayIndexOutOfBoundsException.
> What should I write to avoid this exception?
>
> Best regards
>
> Ibrahim
>
>
>
>
> Ibrahim,
>
> if you want to send the full array, then please replace
> MPI.COMM_WORLD.send(m1, 1, MPI.INT, 1, tag);
> with
> MPI.COMM_WORLD.send(m1, m1.length, MPI.INT, 1, tag);
>
> and do similar changes in recv
>
> Cheers,
>
> Gilles
>
> On 11/5/2015 2:57 AM, Ibrahim Ikhlawi wrote:
>
>
>
> Hello,
>
> I want to send an array from process to another one. I send the array but
> I get only the first element of the array.
> This is a section from my code:
>
> int[] m1= new int[5];
> if (0 == myrank) {
> for(int i= 0; i<m1.length ; i++){
> m1[i] = 100;
> System.out.println("m1["+i+"]"+m1[i]);
> }
> MPI.COMM_WORLD.send(m1, 1, MPI.INT, 1, tag);
>
> }else{
> MPI.COMM_WORLD.recv(m1 , 1 , MPI.INT , 0 ,tag);
> for(int i= 0; i<m1.length ; i++){
> m2[i] = 3*m1[i];
> System.out.println("m1["+i+"]"+m1[i]+" m2["+i+"]"+m2[i]);
> }
> MPI.COMM_WORLD.send(m2, 1 , MPI.INT, 0, tag);
>
> }
>
> if(0 == myrank){
> MPI.COMM_WORLD.recv(m2, 1 , MPI.INT, 1 ,tag);
> System.out.println(Arrays.toString(m2));
> }
>
> the result of this program is:
> m1[0]100
> m1[1]100
> m1[2]100
> m1[3]100
> m1[4]100
> [300, 0, 0, 0, 0]
> m1[0]100 m2[0]300
> m1[1]0 m2[1]0
> m1[2]0 m2[2]0
> m1[3]0 m2[3]0
> m1[4]0 m2[4]0
>
>
> Thanks in advance
>
>
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