[Users] Printing values when using MPI

[Chris Stevens]

Hi everyone,

I am currently debugging some code and have been printing out (using 
either CCTK_INFO and/or printf) debugging information at particular grid 
points (LOCAL mode).

 From what I can tell, Cactus only allows output from one process, say 
rank 0, to stop flooding of the output by printing everything once per 
process. However if I am wanting data from a particular grid point, and 
this grid point is not in the printing process, nothing will output.

I have been getting around this by turning off MPI (fine for one 
iteration or so) but now I am doing longer runs I need to be able to 
print out this information with MPI.

Thus my question:

How can you force Cactus to print out a statement from any process?

Cheers,

Chris

-- 
Dr Chris Stevens

Claude Leon Postdoctoral Fellow

Department of Mathematics

Rhodes University

Room 5

Ph: +27 46 603 8932

Web: www.chrisdoesmaths.com <http://www.chrisdoesmaths.com>

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