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Subject: Re: [OMPI users] Shared-memory problems
From: Bogdan Costescu (bcostescu_at_[hidden])
Date: 2011-11-03 11:50:15


On Thu, Nov 3, 2011 at 15:54, Blosch, Edwin L <edwin.l.blosch_at_[hidden]> wrote:
> -    /dev/shm is 12 GB and has 755 permissions
> ...
> % ls –l output:
>
> drwxr-xr-x  2 root root         40 Oct 28 09:14 shm

This is your problem: it should be something like drwxrwxrwt. It might
depend on the distribution, f.e. the following show this to be a bug:

https://bugzilla.redhat.com/show_bug.cgi?id=533897
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=317329

and surely you can find some more on the subject with your favorite
search engine. Another source could be a paranoid sysadmin who has
changed the default (most likely correct) setting the distribution
came with - not only OpenMPI but any application using shmem would be
affected..

Cheers,
Bogdan