Parallel Rayleigh Quotient Optimization with FSAI-Based Preconditioning

Table 3

Performance of BFSAI-DACG for matrix PO-878 with 2 to 8 processors and different parameter values.

𝑑	𝜌𝐵	𝜀	𝜌𝐿	𝑝=2		𝑝=4		𝑝=8
				iter	𝑇tot	iter	𝑇tot	iter	𝑇tot
2	10	0.01	10	2333	385.76	2877	286.24	3753	273.77
2	10	0.05	10	2345	415.81	2803	245.42	3815	142.93
2	10	0.05	20	2186	370.86	2921	276.41	3445	257.18
2	10	0.00	10	2328	445.16	2880	241.23	3392	269.41
2	20	0.05	10	2340	418.20	2918	224.32	3720	253.98
3	10	0.05	10	2122	375.17	2638	228.39	3366	149.59
3	10	0.05	20	1946	433.04	2560	304.43	3254	263.51
3	10	0.05	30	1822	411.00	2481	321.30	3176	179.67
3	10	0.05	40	1729	439.47	2528	346.82	3019	188.13
4	10	0.05	10	2035	499.45	2469	350.03	3057	280.31