[mpich-discuss] debugging mpi without mpiexec -gdb

[Pavan Balaji]

Bill,

You cannot start a parallel program (using more than 1 process) without 
mpiexec. You can try to attach a debugger to just one of the processes 
using:

% mpiexec -n 1 ./foo : -n 1 ddd ./foo : -n 3 ./foo

This will attach ddd only to the second process. Other than that, I 
can't think of any other good way to use a regular debugger.

  -- Pavan

On 04/13/2010 08:44 AM, William Pearson wrote:
> I have an MPICH2 program that works fine with mpiexec -gdb -np 5 ...., but crashes quite quickly without the -gdb.
> 
> Is there some combination of -machinefile and other parameters that I can give directly to my program, so that I can run it under gdb without using mpiexec?
> 
> Bill Pearson
> 
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji