c - Error in signal handling in OpenMPI -

i'm working understand signal handling in openmpi. read "open mpi forward sigusr1 , sigusr2 mpiexec other processes". question is feature enabled default installation.

the scenario 1 mpi process raises sigusr1, has detected 'orted' forwarded other processes.

in test code, define custom signal handler sigusr1 , register signal handler accordingly. send signal using kill() or raise(). assume orte daemon receive signal , has forward signal remaining processes.

// test.c

void handle_signal(int signal){ if(signal==sigusr1) printf("received sigusr1 signal \n"); } int main(){ mpi_init(null, null);     int my_rank;    mpi_comm_rank(mpi_comm_world, &my_rank);  signal(sigusr1, handle_signal);  if(my_rank == 1) // process rank 1 raises sigusr1      kill(getpid(), sigusr1);  mpi_finalize(); return 0; } 

if run mpirun -np 3 ./test

i expect have statement printed twice other 2 processes. when run code, prints once, , orte hnp, unlike application processes. need call other api on orted explicitly pass signal, application processes receive sigusr1.

- marc

you cannot use signal forwarding way describe:

open mpi forward sigusr1 , sigusr2 from mpiexec other processes

you can't send signal yourself, have find mpiexec process. process can run on different node, cannot send signal anyway.

i cannot think of reasonable way interrupt other mpi ranks that, except mpi_abort, not want. depending on actual goal, have chose asynchronous point point communication, one-side communication or threads.