[Pw_forum] Re: Problems running PWscf in parallel - MPI_ALLreduce

[stewart at cnf.cornell.edu]

Hi Sergey, 

  Thanks for the suggestion.  It does appear to be a standard input issue.  
I found that I could make a short batch file (pw.run) with a single run line 

pw.x < in.file > out.file 

and get mpirun to run through that with mpirun -np 1 pw.run.  The -inp 
option also allows me to read in the input file.  Thanks for that tip. 

However, when I move to calculations with more than one process, I am now 
getting the following error: 

MPI_Allreduce: invalid operation: Invalid argument (rank 0, MPI_COMM_WORLD)
Rank (0, MPI_COMM_WORLD): Call stack within LAM:
Rank (0, MPI_COMM_WORLD):  - MPI_Allreduce()
Rank (0, MPI_COMM_WORLD):  - main()
 ---------------------------------------------------------------------------- 
 -
One of the processes started by mpirun has exited with a nonzero exit
code.  This typically indicates that the process finished in error.
If your process did not finish in error, be sure to include a "return
0" or "exit(0)" in your C code before exiting the application. 

PID 25962 failed on node n0 (192.168.198.104) with exit status 22. 

I am using lam-mpi (7.1.1) and the intel fortran compilers (version 8.1).  I 
dug through the espresso archive and it appears that this error has come up 
before.  However, I didn't see a resolution to the problem listed.  Has 
anyone found a solution to this problem? 

Thanks, 

Derek 

################################
Derek Stewart, Ph. D.
Scientific Computation Associate
250 Duffield Hall
Cornell Nanoscale Facility (CNF)
Ithaca, NY 14853
stewart (at) cnf.cornell.edu 

 

Sergey Lisenkov writes: 

> Dear Derek, 
> 
>>mpirun -np 8 pw.x < run.in > run.out  
>>
>>mpirun C pw.x < run.in > run.out 
>  
> 
> Try  mpirun -np 8 pw.x -inp run.in > run.out  
> 
> instead. Some implementations of MPI doesn't know how to read from standart input. 
> 
> Sergey
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