Stopping tolerance of energy- Energy minimization

Dear LAMMPS developers,

In the minimize command of lammps, it has been mentioned that etol (stopping tolerance of energy) is unitless, I’m wondering if this unitless energy addresses the dE/E for every single atom inside the system or if it refers to the dE/E of the total energy of the system.

LAMMPS command :
minimize etol ftol maxiter maxeval

Many thanks,
Best regards,
Mohammad Ebrahim Izadi

The total energy.
After all, you are minimizing the total energy and that does not mean that the potential energy for all atoms must go down.