Parallel RFSAI-BFGS Preconditioners for Large Symmetric Eigenproblems

Table 7

Iterations, timings, and pseudo efficiencies for problem EMILIA-923.

𝑝	precond	DACG		Newton		Total		𝐸𝑝^(16)
	CPU	CPU	MVP	CPU	MVP	CPU	MVP
16	85.91	478.29	5379	527.05	5616	1091.24	10995
32	55.44	254.57	5377	286.06	5620	596.07	10997	0.92
64	35.47	149.71	5378	164.18	5616	349.36	10994	0.78
128	22.30	88.96	5378	98.61	5618	209.87	10996	0.65
256	13.53	58.98	5378	66.68	5616	139.19	10994	0.49