#Ncores=384 and 200 iterations (1s of physical time)
#Epsilon	wall_clock[s]	wall_clock[s]/iteration
1E-06		212.6		1.063		
1E-07		228.1		1.141
1E-08		261.3		1.307
1E-09		344.4		1.722
1E-10		463.9		2.320
1E-11		616.7		3.084
1E-12		758.4		3.792