(keeping the user's list in the CC)
> On Mar 24, 2017, at 4:05 AM, gzzh...@buaa.edu.cn wrote:
>
> hi jeff:
> I tried to call MPI_Comm_spawn("./child", MPI_ARGV_NULL, 1,
> MPI_INFO_NULL, root, MPI_COMM_WORLD, &newcomm, &errs)
> in order every MPI process in MPI_COMM_WORLD can spawn one child
It's likely a lot more efficient to MPI_COMM_SPAWN *all* of your children at
once, and then subdivide up the resulting newcomm communicator as desired.
It is *possible* to have a series MPI_COMM_SPAWN calls that spawn a single
child process, and then later join all of those children into a singl
