Hi Nathan Sorry for the long, long delay in responding - no reasonable excuse (just busy, switching over support areas, etc.). Hopefully, you already found the solution.
You can specify the signals to forward to children using an MCA parameter: OMPI_MCA_ess_base_forward_signals=SIGINT should do what you are seeking. You can get a list of these using the "ompi_info" program that comes with OpenMPI. In this case, you would find the above param with the following help output: Comma-delimited list of additional signals (names or integers) to forward to application processes [\"none\" => forward nothing]. Signals provided by default include SIGTSTP, SIGUSR1, SIGUSR2, SIGABRT, SIGALRM, and SIGCONT HTH Ralph > On Sep 28, 2019, at 4:42 AM, Nathan GREINER via users > <users@lists.open-mpi.org> wrote: > > Dear open-mpi users, > > I am using open-mpi in conjunction with the mpi4py package to run parallel > simulations using python on my local machine. > > I use the following idiom: > > mpiexec -np 4 python myscript.py > > When I hit ^C during the execution of the above command, the mpi program is > interrupted, and the python programs are also interrupted. > > However, I get no traceback from the python programs, and more > problematically, the cleanup functions of these programs are not executed as > they should when these programs get interrupted. > > The open-mpi documentation states that: "When orterun (<=> mpiexec <=> > mpirun) receives a SIGTERM and SIGINT, it will attempt to kill the entire job > by sending all processes in the job a SIGTERM, waiting a small number of > seconds, then sending all processes in the job a SIGKILL." > > Thus, the python programs receive a SIGTERM signal instead of the SIGINT > signal that they would receive upon hitting ^C during an execution launched > with the idiom: > > python myscript.py > > I know that there is a way to make the python programs handle the SIGTERM > signal as if it was a SIGINT signal (namely, raising a KeyboardInterrupt), > but I would prefer to be able to configure mpiexec to propagate the SIGINT > signal it receives instead of sending a SIGTERM signal to its children > processes. > > Would you know how this could be achieved? > > Thank you very much for your time and help, > > Nathan GREINER > > PS: I am new to the open-mpi users mailing list: is this the right place and > way to ask such a question? > >
