That's really weird: I know that mpirun works (at least the old mpirun
coming with PGI's compiler's MPICH1), and I've make installed the new
Openmp 1.6.5. I've installed it in a custom folder (under
/home/Software/) so it may be that it's not a path in which the OS
looks for the MPI libraries: should I set some environmental variable
and/or source commands for pointing the bash shell to the installed
Openmp?
Ralph Castain <r...@open-mpi.org> ha scritto:
Given what you report, you don't even have MPI installed on your
machine. The output you provided indicates that no mpicc and no
mpiexec have been installed on your machine, and so none of the MPI
implementations have actually been installed.
On Aug 29, 2013, at 2:49 AM, Reuti <re...@staff.uni-marburg.de> wrote:
Am 29.08.2013 um 10:41 schrieb Federico Carotenuto:
Kind Reuti,
the output of which mpicc is that such program may be found in
various packages (which can be installed with apt-get), while
which mpiexec outputs nothing (goes back to the prompt).
You can compile and install Open MPI directly from source - even
without being root. You are not limited to what the distribution
offers at all.
-- Reuti
Seems like no mpicc and mpiexec are set on the system...
Reuti <re...@staff.uni-marburg.de> ha scritto:
Hi,
Am 26.08.2013 um 18:10 schrieb Federico Carotenuto:
Kind Reuti,
as you suggested I proceeded to install Openmpi 1.6.5
Good.
and changed the environmental variable MPI_ROOT
No, there is no such variable necessary to be set (at least from
Open MPI points of view).
to the new folder, should I know source the commands in .bashrc
to be sure to be able to execute the right mpirun and mpiexec
(something like source
Please check with:
which mpicc
which mpiexec
which you are using. It's also necessary to recompile the
application with the new MPI library.
-- Reuti
/home/modelstation/Software/openmpi1.6.5/mpirun, where the
directory is the installation directory)?
Thanks!
Reuti <re...@staff.uni-marburg.de> ha scritto:
Am 26.08.2013 um 14:33 schrieb Federico Carotenuto:
Kind Reuti,
I'm start thinking I've got some compilation issue with MPI:
I'm afraid I've got the MPICH 1 coming with the PGI compiler
installation, because if I try to run mpiexec the terminal
answers with "The program 'mpiexec' can be found in the
following packages: *lam-runtime *mpich2 *openmpi-bin
*openmpi1.6-bin. Try: sudo apt-get install <selected package>".
I've also tried to modify the machinefile that comes by
default under
/opt/pgi/linux86-64/13.4/mpi/mpich/share/machinefile.LINUX
adding the line "modelstation:8", but still mpirun prompts for
the password 8 times.
This was normal at that time: one rsh/ssh per parallel
instance. Nowadays Open MPI and MPICH2/3 will use only one
`rsh`/`ssh` per host and start all other parallel tasks as
thread (i.e: on a local machine they don't need a local `rsh`
or `ssh` at all). Although you could either adjust `rsh` to
disregard passwords (deprecated) or route `rsh` to `ssh` and
enable passphraseless login:
MPICH(1) is outdated (released 2005) and I suggested already to
Portland to exclude it from the package. IMO this adds more
confusion than it help.
Hence, please install a recent version of Open MPI or MPICH2/3
and then we can look into it again on the appropriate list.
-- Reuti
PS: The above mentioned LAM/MPI is outdated too.
Thanks for your help and patience
Reuti <re...@staff.uni-marburg.de> ha scritto:
Am 26.08.2013 um 12:53 schrieb Federico Carotenuto:
Kind Reuti,
Thanks for your quick reply!
I'm afraid I didn't set a machinefile...that may be the
problem: I'm fairly new to MPI and SSH and I'm still quite
confused even after reading some tutorials.
There is a default. But you can also specify it on the
command line to test it:
mpiexec -host modelstation -np 2 mpihello
-- Reuti
My etc/hosts contains: 127.0.0.1 localhost and 127.0.1.1
modelstation (modelstation is the machine name I was
mentioning in the previous mail)
if I type hostname the terminal returns modelstation
Cheers
Reuti <re...@staff.uni-marburg.de> ha scritto:
Am 26.08.2013 um 12:15 schrieb Federico Carotenuto:
I'm currently having this issue with mpirun: I want to
launch a program only on the cores of the local machine,
but every time I run an mpi program it says that the host
127.0.0.1 <local_machine_name> with it's associated key is
unkown and asks me if I want to add it to the list of ssh
known hosts.
By chowing/chmodding the .ssh file I was able to
permanently add this "host" to the list of known hosts,
but my problem is that every program that I try to run ask
me to insert a password (the actual local user password) n
times where n is equal to the -np parameter (i.e.: if I
run the program on 8 cores I receive 8 successive password
pronts).
If I insert the password everything runs fine, but it's
quite annoying and I wish to bypass such step: is there a
way to have mpirun memorize the password? Or make him
understand that the 8 nodes are actually 8 cores on the
local machine and not 8 different hosts?
Which hostname do you specify in your machinefile?
Which hostnames are set in /etc/hosts for your local machine?
What is the output of `hostname`? Does it match the one in
the machinefile?
For systemd there is a new command `hostnamectl --static
set-hostname [NAME]` to set it.
-- Reuti
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