mpiexec makes a couiple of serial jobs on each node

["Masahiro TATSUMI (巽]

Hi Pete,
 
> But it got the right answer three times in a row, and did all that
> faster than the parallel version of cpi!  :)

You right! :)  That's the point I want to use mpiexec :)
 
(snip)

> Short anwser: I suspect you used the default configuration options for
> mpiexec, which makes it expect an MPICH/GM job, but you gave it an
> executable (cpi) which was compiled using an MPICH/P4 MPI library.  You
> have a couple of options here:
> 
>     1.  Tell mpiexec explicitly what communication library you have:
> 
> 	mpiexec --comm=mpich-p4 /usr/local/mpi/examples/cpi

That's it. I thoght MPICH/P4 was the default communication lib in mpiexec.
(Now I understand how mpiexec try to invoke a job)

Thank you very much.

---
Masahiro TATSUMI, Ph.D.  <tatsumi at nfi.co.jp>   // Parallel, it works!
Fuel Engineering and Develpment Dpt.,  Nuclear Fuel Industries, Ltd.
950 Ohaza Noda, Kumatori-cho, Sennan-gun, Osaka 590-0481 JAPAN 
          Tel.: +81-724-52-8111   Fax: +81-724-52-8117