Adaptive techniques for clustered N-body cosmological simulations

Table 1 Breakdown of time for 1 step in seconds for 12 billion particle (top half) and 24 billion particle (bottom half) datasets run on Blue Waters with the proposed optimizations

#cores	Gravity	DD	TB	LB	Total time
16,384	77.556	1.299	0.729	0.128	79.712
32,768	39.254	0.698	0.617	0.136	40.705
65,536	19.876	0.496	0.367	0.062	20.801
131,072	9.967	0.181	0.138	0.027	10.313
262,144	5.051	0.109	0.076	0.013	5.249
524,288	2.569	0.073	0.034	0.008	2.684
32,768	75.090	1.553	0.735	0.186	77.564
65,536	37.941	0.787	0.462	0.111	39.301
131,072	19.062	0.428	0.245	0.063	19.798
262,144	9.682	0.232	0.152	0.042	10.108
524,288	4.903	0.146	0.095	0.022	5.166