[mpich-discuss] hydra proxy questions

[Steve Krueger]

It's not really a problem. I just wanted to know what the expected behavior is.

What should happen if you kill the mpirun process? Are there any MPI calls
that talk to the hydra proxy process?



> -----Original Message-----
> From: Pavan Balaji [mailto:balaji at mcs.anl.gov]
> Sent: Monday, February 27, 2012 11:07 PM
> To: mpich-discuss at mcs.anl.gov
> Cc: Steve Krueger
> Subject: Re: [mpich-discuss] hydra proxy questions
> 
> 
> No, it's not expected.  Can you try out the latest version of MPICH2 to
> see if this problem still exists?
> 
>   -- Pavan
> 
> On 02/27/2012 08:39 AM, Steve Krueger wrote:
> > I am using MPICH2 1.3.2p1 with hydra launcher and sock device.
> >
> > I've noticed that when I start a job via mpirun, the follow processes
> >
> > are started on my behalf.
> >
> > 1) mpirun
> >
> > 2) ssh to all the machines
> >
> > 3) hydra_pmi_proxy on all the machine
> >
> > 4) my exe on all the machines
> >
> > If I kill the mpirun process, 1,2 and 3 are all terminated, but my exe (4)
> >
> > continues to function normally.
> >
> > My questions:
> >
> > 1) Is this expected behavior?
> >
> > 2) Should killing the mpirun process kill all the ranks?
> >
> > 3) Is there any operation that the ranks could do that require the proxy
> > process?
> >
> > I'm asking, as I've noticed strange hangs in my exe potentially related
> > to creating new
> >
> > MPI_Comm's, but only after I kill the mpirun process.
> >
> > sk
> >
> >
> >
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> 
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji