Parallel RFSAI-BFGS Preconditioners for Large Symmetric Eigenproblems

Table 5

Comparison between DACG and Newton-DACG for the four test problems on 𝑝=64 processors. Results on problem LONG-1103 are obtained using 𝜏_DACG=0.5.

Matrix name	DACG		Newton-DACG
	MVP	CPU time	𝑘max	MVP	CPU time
FLOW3D-663	51427	658.55	10	15833	229.33
EMILIA-923	13404	410.93	20	10649	346.83
LONG-1103	15222	390.05	20	8857	256.59
GEO-1438	12667	354.63	20	10441	326.99