Hmmm….I haven’t heard of that specific use-case, but I have seen some similar things. Did you want the processes to be paused, or killed, when you scale down? Obviously, I’m assuming they are not MPI procs, yes?
I can certainly see a way to make mpirun do it without too much fuss, though it would require a message as opposed to a signal so you can indicate how many procs to “idle/kill”. > On Mar 17, 2016, at 3:22 PM, Andrus, Brian Contractor <bdand...@nps.edu> > wrote: > > All, > > I have an mpi-based program that has a master process that acts as a ‘traffic > cop’ in that it hands out work to child processes. > > I want to be able to dynamically throttle how many child processes are in use > at any given time. > > For instance, if I start it with “mpirun -n 512” I could send a signal to > tell it to only use 256 of them for a bit and then tell it to scale back up. > The upper limit being the number of processes mpirun was launched with. > > > Has anyone done anything like this? Maybe a better way to do it? > Basically my program is crunching through a large text file, examining each > line for various things. > > Thanks in advance for any insight, > > Brian Andrus > > _______________________________________________ > users mailing list > us...@open-mpi.org <mailto:us...@open-mpi.org> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > <http://www.open-mpi.org/mailman/listinfo.cgi/users> > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/03/28744.php > <http://www.open-mpi.org/community/lists/users/2016/03/28744.php>
