On Oct 30, 2007, at 9:42 AM, Jorge Parra wrote:
Thank you for your reply. Linux does not freeze. The one that
freezes is
OpenMPI. Sorry for my unaccurate choice of words that led to
confusion.
Therefore dmesg does not show anything abnormal (I attached to this
email
a full dmesg log, captured when openmpi freezes).
When openmpi ferezes I can, from another terminal, see that the
node on
which openmpi is originaly run (the local one) has two processes:
orted
and mpirun. The remote node has one: orted. This seems to be normal.
However, in both nodes there are not any openmpi activity. There is
only
an initial "calling init" printout in the local node (I included it in
the greetins.c program for testing purposes).
Unfortunately, I have not been able to compile openmpi 1.2.4 or any
of the
1.2 trunk versions. Trunks 1.0 and 1.1 copiled well in my system. I
already opened a case for this, but I received a message that the
person
it was assigned is in paternal leave. So I think I need to wait a
bit for
help on that :). So I am stuck with version 1.1.5.
Are you referring to this thread:
http://www.open-mpi.org/community/lists/users/2007/10/4218.php
There's currently only one person on paternal leave, and although he
is the powerpc guy :-), he's not really the build system guy (I'm
kinda *guessing* that either OMPI or libltdl is choosing to build or
link the wrong object -- but that's a SWAG without seeing any
additional information).
I sent you a reply on 24 Oct asking for a bit more information:
http://www.open-mpi.org/community/lists/users/2007/10/4310.php
I am running openmpi as root because my system has some special
conditions. This is an attempt to make an embedded Massive Parallel
Processor (MPP), so the nodes are running embedded versions of linux,
where normally there is just one user (root). Since this is an
isolated
system, I did not thing this could be a problem (I don't care about
security issues too).
Again, thank you for all your help,
Jorge
On Tue, 30 Oct 2007, Rainer Keller wrote:
Hello Jorge,
On Monday 29 October 2007 18:27, Jorge Parra wrote:
When running openMPI my system freezes when initializing MPI
(function
MPI_init). This happens only when I try to run the process in
multiples
nodes in my cluster. Running multiple instances of the testing code
locally (i.e ./mpirun -np 2 greetings) is succesful.
would it be possible to repeat the tests with the latest Open
MPI-1.2.4
version?
Even though nothing in Open MPI should make Your system freeze.
Could You check the logs on the nodes and possibly have a dmesg
created just
before the MPI_Init...
- rsh runs well, and is configured to full access. (i.e. rsh
"192.168.1.103 date" is succesful, so they are "rsh AFRLMPPBM2
date" or
"rsh AFRLMPPBM2.MPPdomain.com"). Security is not an issue in this
system.
- uname -n and hostname return a valid hostname
- The testing code (attached to this email) is run (and fails) as:
./mpirun --hostfile /root/hostfile -np 2 greetings . The hostfile
has the
names of the localnode (first entry:AFRLMPPBM1) and the remote node
(second entry: AFRLMPPBM2). This file is also attached to this
email.
- The environment variables seem to be properly set (see env.log
attached
file). Local mpi programs (i.e. ./mpirun -np 2 greetings) run well.
-.profile has the path information for both the executables and the
libraries
- orted runs in the remote node, however it does not print
anything in
console. The only output in the remote node is:
pam_rhosts_auth[235]: user root has a `+' user entry
pam_rhosts_auth[235]: allowed to r...@afrlmppbm1.mppdomain.com as
root
PAM_unix[235]: (rsh) session opened for user root by (uid=0)
in.rshd[236]: r...@afrlmppbm1.mppdomain.com as root: cmd='( ! [ -e
./.profile ]
|| . ./.profile; orted --bootproxy 1 --name 0.0.1 --num_procs 3
You're running as root? Why is that?
Then the remote process returns command prompt. However orted is
in the
background. The local process is frozen, and just prints:
"Calling init",
which is just before MPI_Init (see greetings.c).
I believe the COMM WORLD cannot be correctly initialized. However
I can't
see which part of my configuration is wrong.
Any help is greatly appreciated.
With best regards,
Rainer
_______________________________________________
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Jeff Squyres
Cisco Systems
