Parallel RFSAI-BFGS Preconditioners for Large Symmetric Eigenproblems

Table 6

Iterations, timings, and pseudo efficiencies for problem FLOW3D-663.

𝑝	precond	DACG		Newton		Total		𝐸𝑝^(8)
	CPU	CPU	MVP	CPU	MVP	CPU	MVP
8	42.43	238.34	4291	704.78	11112	985.55	15403
16	27.00	131.29	4291	408.05	11681	566.33	15972	0.87
32	18.17	79.85	4292	241.79	11275	339.81	15567	0.73
64	89.32	54.57	4291	166.77	11542	230.67	15833	0.53
128	84.89	40.68	4292	119.82	11177	165.39	15469	0.37