PPPM/electrode initialization ...
  using 12-bit tables for long-range coulomb (src/kspace.cpp:342)
  G vector (1/distance) = 0.45131303
  grid = 16 16 32
  stencil order = 5
  estimated absolute RMS force accuracy = 0.016771921
  estimated relative force accuracy = 5.0508141e-05
  using double precision FFTW3
  3d grid and FFT values/proc = 2475 256