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Subject: Re: [OMPI users] MPI_Comm_spawn lots of times
From: Nicolas Bock (nicolasbock_at_[hidden])
Date: 2009-12-01 18:38:20


On Tue, Dec 1, 2009 at 16:28, Abhishek Kulkarni <abbyzcool_at_[hidden]> wrote:

> On Tue, Dec 1, 2009 at 6:15 PM, Nicolas Bock <nicolasbock_at_[hidden]>
> wrote:
> > After reading Anthony's question again, I am not sure now that we are
> having
> > the same problem, but we might. In any case, the attached example
> programs
> > trigger the issue of running out of pipes. I don't see how orted could,
> even
> > if it was reused. There is only a very limited number of processes
> running
> > at any given time. Once slave terminates, how would it still have open
> > pipes? Shouldn't the total number of open files, or pipes, be very
> limited
> > in this situation? And yet, after maybe 20 or so iterations in master.c,
> > orted complains about running out of pipes.
> >
> > nick
> >
>
> What version of OMPI are you trying it with? I can easily run it up to more
> than 200 iterations.
>
>
openmpi-1.3.3

> Also, how many nodes are you running this on?
>
> This is on one node with 4 cores. I am using

mpirun -np 1