Table 8.

Computational time (in s) and efficiency (eff) according to (58) for a nonlinear elastic problem using a varying number of processing units P. The time is measured for 1 time step with 5 Newton steps for all-floating FETI and the lumped preconditioner.

P	local time	eff	global CG time	eff	total time	eff
16	407.7 s	1.000	1311.7 s	1.000	2028.6 s	1.000
32	203.1 s	1.004	666.4 s	0.984	1054.2 s	0.962
64	101.7 s	1.002	345.4 s	0.949	562.0 s	0.902
128	50.5 s	1.009	184.7 s	0.888	316.7 s	0.801
256	25.3 s	1.007	103.8 s	0.790	192.8 s	0.658
512	12.7 s	1.000	67.6 s	0.606	161.0 s	0.394