large other time

Dear all,

Sorry for disturbing you, in my simulation whit lammps (28 Jul 2015), I got following out put for runnin times:

Loop time of 31768.4 on 4 procs (4 MPI x 1 OpenMP) for 16000000 steps with 31298 atoms

Pair time () = 9553.57 (30.0726) Neigh time () = 314.641 (0.990421)
Comm time () = 920.07 (2.89618) Outpt time () = 22.9413 (0.0722142)
Other time (%) = 20957.1 (65.9686)

Nlocal: 7824.5 ave 7896 max 7715 min
Histogram: 1 0 0 0 0 1 0 0 0 2
Nghost: 334.5 ave 339 max 327 min
Histogram: 1 0 0 0 0 0 1 0 1 1
Neighs: 15002.8 ave 15255 max 14686 min
Histogram: 1 0 0 0 1 0 0 1 0 1

Total # of neighbors = 60011
Ave neighs/atom = 1.91741
Neighbor list builds = 108103
Dangerous builds = 4

As you see, pair, neigh, comm and output times are reasonable, but other time is very large,
I read the manual but I can’t find details of other time, is there any Idea about other time and an strategy to reduce this large time?

code::

units cgs
dimension 2
atom_style sphere
boundary p f p
processors 4 1 1
newton off


#************* main run
pair_style gran/hertz/history {Kn} NULL {gam_n} {gam_n} {fric} 1
pair_coeff * *
fix wal all wall/gran {Kn} NULL {gam_n} {gam_n} 0.9 1 yplane 0.0 {y_high}

fix 2D all enforce2d
fix ensmble all nve/sphere
fix gravit all gravity {g_prime} vector 0 -1 0 fix visc all viscous {gamma}

compute 1 all erotate/sphere
neighbor 0.0025 bin
thermo 20000
thermo_style custom step cpu
comm_modify vel yes
timestep 0.0002
run_style verlet
#**************************************** run and dump **************************************************#
dump reza2 all xyz 5000 vmd/*.xyz
run 16000000

Thanks in Advance,
Reza