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Simulations, Data Analysis and Algorithms

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

From: Adaptive techniques for clustered N-body cosmological simulations

#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