On Aug 28, 2012, at 6:47 PM, Tony Raymond <traym...@bcgsc.ca> wrote:
> Hi Ralph, > > Thanks for taking care of this so quick! > > Does this mean that MPI_Init will leave the SIGCHLD handler alone? Yes > Should it be fine to set the handler as I did in the current version of MPI? Yes - no harm done either way, but we shouldn't be messing with the handler (and didn't realize we were). > > Thanks, > Tony > ________________________________________ > From: users-boun...@open-mpi.org [users-boun...@open-mpi.org] On Behalf Of > Ralph Castain [r...@open-mpi.org] > Sent: Tuesday, August 28, 2012 2:40 PM > To: Open MPI Users > Subject: Re: [OMPI users] MPI_Init > > Okay, I fixed this on our trunk - I'll post it for transfer to the 1.7 and > 1.6 series in their next releases. > > Thanks! > > On Aug 28, 2012, at 2:27 PM, Ralph Castain <r...@open-mpi.org> wrote: > >> Oh crud - yes we do. Checking on it... >> >> On Aug 28, 2012, at 2:23 PM, Ralph Castain <r...@open-mpi.org> wrote: >> >>> Glancing at the code, I don't see anywhere that we trap SIGCHLD outside of >>> mpirun and the orte daemons - certainly not inside an MPI app. What version >>> of OMPI are you using? >>> >>> On Aug 28, 2012, at 2:06 PM, Tony Raymond <traym...@bcgsc.ca> wrote: >>> >>>> Hi, >>>> >>>> I have an application that uses openMPI and creates some child processes >>>> using fork(). I've been trying to catch SIGCHLD in order to check the exit >>>> status of these processes so that the program will exit if a child errors >>>> out. >>>> >>>> I've found out that if I set the SIGCHLD handler before calling MPI_Init, >>>> MPI_Init sets the SIGCHLD handler so that my application appears to ignore >>>> SIGCHLD, but if I set my handler after MPI_Init, the application handles >>>> SIGCHLD appropriately. >>>> >>>> I'm wondering if there are any problems that could come up by changing the >>>> SIGCHLD handler, and why MPI_Init modifies the SIGCHLD handler in the >>>> first place. >>>> >>>> Thanks, >>>> Tony >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >> > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
