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Nicholas Leippe wrote:
> On Thursday 19 October 2006 11:30, Alex Esplin wrote:
>> Eh? Somebody wanna enlighten a confused young whippersnapper that has
>> no clue what is going on here but would like to learn something?
>
> for(x = 0; x < 10; x++){
> if(fork() > 0){
> MPI_Comm_rank(MPI_COMM_WORLD, &myrank); /* Get my rank
>
> */
> MPI_Comm_size(MPI_COMM_WORLD, &size); /* Get the total
> number of
> processors */
> printf("Processor %d of %d: Running!\n", myrank, size);
> }
> }
>
> - The 1st process will execute the loop 10 times, spawning 10 children. Call
> them generation 1.
> - Each of the 10 generation-1 children continue executing the loop, which at
> this point has 9 iterations left to go, and thus they each spawn 9 children.
> Call them generation 2.
> - Each of the 90 generation-2 children continue executing the loop, which at
> this point now has 8 iterations left to go, and thus they each spawn 8
> children.
> - etc.
It's actually worse than this since x isn't incremented before the fork() call.
- --
[EMAIL PROTECTED] is Doran L. Barton, president/CTO, Iodynamics LLC
Iodynamics: IT and Web services by Linux/Open Source specialists
"We build bodies that last a lifetime."
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