Install Petsc with MPI in Ubuntu

[moquita]

Hello:
I would like to install PETSC 2.3.3-p8 (last release) with MPI in a PIV Dual Core with Ubuntu 7.10.
(This is just for a training process before put the code running in a cluster!)

I followed the instructions in PETSC home page, and i did an install with:
./config/configure.py --with-cc=gcc --with-fc=g77
--download-mpich=ifneeded

and after that i ran the make test and it was all OK (apparently).
The problem is, when i try to run an code with 2 or more processors, like,

mpiexec -np 2 ./ex1
the computer just runs twice the ex1, instead of paralelizing the data. (I tryed this line in another machine and it worked fine!)



I've also tryed:
./config/configure.py --with-cc=gcc --with-fc=g77
--with-mpi-dir=/usr/lib/mpich/

but when i do
make test

I get
%%%%%%%%%%%
> Running test examples to verify correct installation
> C/C++ example src/snes/examples/tutorials/ex19 run successfully with
> 1 MPI
> process
> Possible error running C/C++ src/snes/examples/tutorials/ex19 with 2
MPI processes
See http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html
ssh: connect to host localhost port 22: Connection refused
p0_2875: p4_error: Child process exited while making connection to
remote
process on localhost: 0
p0_2875: (2.404214) net_send: could not write to fd=4, errno = 32
Graphics example src/snes/examples/tutorials/ex19 run successfully
with 1
MPI process
Fortran example src/snes/examples/tutorials/ex5f run successfully
with 1
MPI process
Completed test examples
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Does anybody know how to solve it?

Thanks in advance,
M

[Deeprachu]

Hmm..I am also working on PETSc since few months, but not in ubuntu..I am planning to work on ubuntu very soon. I don't have an exact solution of your problem, but a couple of suggestion.
-.Why don't you try some individual examples in examples directory present in petsc and see what you get.
-.Are you executing your program in cluster or in a single (or dual) core machine?
-. Have you created the mpd.hosts file and started the mpd deamon? (This could be a possible issue.)

[lkness]

Hi. I'm working on getting PETSC runing in ubuntu, but my problem is with the mpd process. When i look at your error message, isn't it saying that it is using ssh and could not connect? So either sshd isn't running or a firewall is in the way, right? Can you ssh to yourself? When you do a "-np 2" on a single cpu machine, doesn't it spawn 2 processes and then use ssh to connect them together to simulate the requested 2 cpus?

Lanny