I have been breaking my head over the following code since morning, I get a segmentation error everytime!
Apparently, there is some problem in the pointer that I am passing through MPI_Isend and MPI_Ireceive that gives me a segmentation fault. I really donot know what. I have also tried passing &world[start][0] and so on.
Last edited by confused_coder; 09-07-2009 at 09:35 PM.
Do you plan to return anything from your initialize function?
yes...since I am allocating space to the 2D array in the intialize function, I need to return the pointer to the space
Good. Then do so.Originally Posted by confused_coder
I have a "return world; " statement at the end of the function!
Oh, so that's an indentation error and not an actual error. Ah.
Anyway, I can pretty much personally guarantee that "world+((start)*(N+2))" is so far out of range that it's not even funny. The only time that's valid is if start is zero; if start is one it points to one past your array, and if start is bigger it's even worse. (Remember that world is not actually a two-dimensional array, so trying to do pointer arithmetic as though it were is Just Not Going to Work.)
Hi...i solved it
I am supposed to send &request, and not request. I was declaring it as MPI_Request *request and sending request.
After all those pointer considerations!
Thanks a lot for your time, I am deleting the code since this is an assignment for me!
