Hello,
I seem to be unable to get Lam/Mpi to work with Rmpi on Debian 5. Following the
readme file, I installed the packages r-cran-rmpi and lam3 lam3-dev lam-runtime
. The lam-bhost.def is configured like this:
hn01
cn01 cpu=4
cn02 cpu=4
Lam seems to be fine with this:
>lamboot -v
n-1<13746> ssi:boot:base:linear: booting n0 (hn01)
n-1<13746> ssi:boot:base:linear: booting n1 (cn01)
n-1<13746> ssi:boot:base:linear: booting n2 (cn02)
n-1<13746> ssi:boot:base:linear: finished
However, Rmpi 0.5.5 is not:
> library("Rmpi")
[hn01:30424] mca: base: component_find: unable to open osc pt2pt: file
not found (ignored)
> mpi.spawn.Rslaves()
1 slaves are spawned successfully. 0 failed.
master (rank 0, comm 1) of size 2 is running on: hn01
slave1 (rank 1, comm 1) of size 2 is running on: hn01
> mpi.remote.exec(paste("I am",mpi.comm.rank(),"of",mpi.comm.size()))
$slave1
[1] "I am 1 of 2"
> mpi.close.Rslaves()
[1] 1
> mpi.quit()
Note how only one slave is spawned. Trials with mpiexec -n 3 R --no-save -q and
the .Rprofile in place started R on multiple nodes, but produced this output:
[hn01:04612] mca: base: component_find: unable to open osc pt2pt: file not
found (ignored)
> [cn01:30306] mca: base: component_find: unable to open osc pt2pt: file not
> found (ignored)
[cn01:30304] mca: base: component_find: unable to open osc pt2pt: file not
found (ignored)
[cn01:30305] mca: base: component_find: unable to open osc pt2pt: file not
found (ignored)
>
[1]>
[1]>
[1] "Please use mpi.quit() to quit R"
"Please use mpi.quit() to quit R"
"Please use mpi.quit() to quit R"
-----------------------------------------------------------------------------
It seems that [at least] one of the processes that was started with
mpirun did not invoke MPI_INIT before quitting (it is possible that
more than one process did not invoke MPI_INIT -- mpirun was only
notified of the first one, which was on node n0).
mpirun can *only* be used with MPI programs (i.e., programs that
invoke MPI_INIT and MPI_FINALIZE). You can use the "lamexec" program
to run non-MPI programs over the lambooted nodes.
-----------------------------------------------------------------------------
mpirun failed with exit status 252
Do you have any suggestions?
Cheers,
Ingeborg Schmidt
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