Source file misc.M

• Subroutine energy:

The subroutine energy calculates and prints the total energy contained in the system. It is used to monitor energy conservation as a test for numerical reliability.
• Subroutine load_balance:

The subroutine load_balance prints the average, the minimum and the maximum number of particles per processor. It also shows how which fraction of the particle buffer is in use at present. The code aborts when the particle buffer turns out to be too small. For best performance all processors should treat a similar number of particles, since all processors have to wait until the last one has finished processing the particle data. This goal, however, may conflict with the criteria for optimal multigrid performance (nx=ny) and for minimum communication over head.
• Subroutine subtract_average:

This routine is used to subtract the total average from a global data field. It is called from source file p3d.F90 to subtract the average charge in case the switch subtract_average_rho is in use.