MPI_Abort

[Tobias Burnus]

On 07/13/2011 03:01 PM, Daniel Carrera wrote:
> For example, I think it might be nice to try to free the coarrays 
> before aborting.

Well, one could - but on the other hand, the operating system will clean 
up ;-)

The idea of a more graceful abort is to send all other images a message 
with an "error stop" tag, wait for a few seconds for them to close down. 
If it successes, write the error and call MPI_FINALIZE. If they didn't 
answer, pull the plug by calling MPI_ABORT.

In order to implement this scheme, one needs the message queue, which we 
do not yet have.

Hence, for the moment, I would stick to a simple MPI_abort.


If one wants to do a cleanup, one could free the memory (as in 
caf_finalize). That will miss those of allocatable arrays, but who cares 
- after all, one does an error abort. Additionally, the state of the 
program when doing an error abort might be not the best.

Tobias