[mpich-discuss] MPICH not executing more than 1 process on Windows 7

[Jose Marques]

Nick,

What sort of core does yr laptop have ? I suppose it will have more than 
1 cpu.

When you're using just one machine there's no need for the machine file, 
etc.
Just try mpiexec -np x www, where x is the number of processes and www 
is the code.

I also found useful to make (before) mpiexec -register, to save the 
password for the current user; must match the windows password for that 
user. For this you should open a command window, with "run as 
administrator".

Please note that the User Account Control must be off; this feature is 
poorly documented and can lead to several error messages, apparently 
uncorrelated.

Jose

On 27-02-2012 3:14, Nicholas Goodman wrote:
> Hi,
>    I have just installed MPICH2 on my Windows 7 Professional (64-bit) laptop.  I am using the current stable, 32-bit MPICH2 installation and Microsoft Visual Studio 2010.  I have run into a problem running any MPI program with more than 1 process.  If I run either my own hello-world code or the cpi.exe example with "-n 1", the program completes successfully.  If I run an MPI program with "-n 2", it hangs and does not do anything unless I kill the program.  I have included the output of my console below (the #### lines are my comments about what's going on).  Do you have any suggestions?
>
>
>
> #### Using -n 1, the program returns correctly
> C:\Program Files (x86)\MPICH2\examples>mpiexec -machinefile hosts -n 1 -user AYBABTU\nick cpi.exe
> Please specify an authentication passphrase for smpd:
> Please specify an authentication passphrase for smpd:
> Enter the number of intervals: (0 quits) 1
> pi is approximately 3.2000000000000002, Error is 0.0584073464102071
> wall clock time = 0.000041
> Enter the number of intervals: (0 quits) 0
>
> #### If -n 2 used, nothing happens:
> C:\Program Files (x86)\MPICH2\examples>mpiexec -machinefile hosts -n 2 -user AYBABTU\nick cpi.exe
> Please specify an authentication passphrase for smpd:
> Please specify an authentication passphrase for smpd: Please specify an authentication passphrase for smpd:
>
> #### If I<CTRL>-<C>  the program (after 30 seconds), the following happens
> mpiexec aborting job...
>
>
> job aborted:
> rank: node: exit code[: error message]
> 0: 127.0.0.1: 123: mpiexec aborting job
> 1: 127.0.0.1: 123
>
>
>
>
> thanks,
>    Nick
>
> ------------------------------
>   Nick Goodman
>   MS Candidate, Computer Science
>   University of Colorado
>
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-- 
Dr. Jose G. Marques
Reactor Manager
Instituto Tecnologico e Nuclear     phone:  (+351) 219 946 115
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P-2686-953 Sacavem, Portugal