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Full Discussion: (MPI) Segmentation fault with dynamic allocated 2D array
Top Forums Programming (MPI) Segmentation fault with dynamic allocated 2D array Post 302150770 by porter on Wednesday 12th of December 2007 03:17:03 PM
Old 12-12-2007
Quote:
Originally Posted by lancer6238
Please advise. Thank you.
Firstly, make a backup.

Then remove all the code that refers to arrays of ints and just prove that you can pass a buffer of characters around, effectively an MPI Hello World. Confirm that this cleanly exits.

Then be careful with your type casting whereever there is a void *, for instance the first argument to MPI_Send.

If you want to send 'ints' then change that to a

Code:
int *mySendData=&(cell[i][0]);
MPI_Send(mySendData,.....

and similarly on the read, this lets the compiler do type checking for you.

Also, run the thing under a debugger or use the core dump to find out where the thing is failing. Have you not closed the library down correctly? Is this a build issue? Is it compiler options or selection of libraries?
 

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