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Subject: Re: [OMPI users] MPI_Comm_spawn lots of times
From: Abhishek Kulkarni (abbyzcool_at_[hidden])
Date: 2009-12-02 18:37:46


On Wed, Dec 2, 2009 at 5:00 PM, Ralph Castain <rhc_at_[hidden]> wrote:
> Indeed - that is very helpful! Thanks!
> Looks like we aren't cleaning up high enough - missing the directory level.
> I seem to recall seeing that error go by and that someone fixed it on our
> devel trunk, so this is likely a repair that didn't get moved over to the
> release branch as it should have done.
> I'll look into it and report back.

You are probably referring to
https://svn.open-mpi.org/trac/ompi/changeset/21498

There was an issue about orte_session_dir_finalize() not
cleaning up the session directories properly.

Hope that helps.

Abhishek

> Thanks again
> Ralph
> On Dec 2, 2009, at 2:45 PM, Nicolas Bock wrote:
>
>
> On Wed, Dec 2, 2009 at 14:23, Ralph Castain <rhc_at_[hidden]> wrote:
>>
>> Hmm....if you are willing to keep trying, could you perhaps let it run for
>> a brief time, ctrl-z it, and then do an ls on a directory from a process
>> that has already terminated? The pids will be in order, so just look for an
>> early number (not mpirun or the parent, of course).
>> It would help if you could give us the contents of a directory from a
>> child process that has terminated - would tell us what subsystem is failing
>> to properly cleanup.
>
> Ok, so I Ctrl-Z the master. In
> /tmp/.private/nbock/openmpi-sessions-nbock_at_mujo_0 I now have only one
> directory
>
> /tmp/.private/nbock/openmpi-sessions-nbock_at_mujo_0/857
>
> I can't find that PID though. mpirun has PID 4230, orted does not exist,
> master is 4231, and slave is 4275. When I "fg" master and Ctrl-Z it again,
> slave has a different PID as expected. I Ctrl-Z'ed in iteration 68, there
> are 70 sequentially numbered directories starting at 0. Every directory
> contains another directory called "0". There is nothing in any of those
> directories. I see for instance:
>
> /tmp/.private/nbock/openmpi-sessions-nbock_at_mujo_0/857 $ ls -lh 70
> total 4.0K
> drwx------ 2 nbock users 4.0K Dec  2 14:41 0
>
> and
>
> nbock_at_mujo /tmp/.private/nbock/openmpi-sessions-nbock_at_mujo_0/857 $ ls -lh
> 70/0/
> total 0
>
> I hope this information helps. Did I understand your question correctly?
>
> nick
>
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