Table 2.
Coupled
εκ
αr-DPD-LAMMPS solver: strong scaling in coupled blood flow simulation in the domain of figure 1. Ncore is the number of cores and CPU-time is the time required for 4,000 DPD-LAMMPS timesteps. The total number of DPD particles is 823,079,981. Efficiency is computed as a gain in CPU-time divided by the expected gain due to increase in Ncore with respect to a simulation with lower core-count. Simulations were performed on IBM Blue-Gene/P computer at Jülich Supercomputing Centre in Forschungszentrum Jülich (FZJ) and on CRAY XT5 computer at the National Institute for Computational Sciences and Oak Ridge National Laboratory.
| Ncore | CPU-time [s] | efficiency |
|---|---|---|
| Blue Gene/P (4 cores/node) | ||
| 32,768 | 3580.34 | – |
| 131,072 | 861.11 | 1.04 |
| 262,144 | 403.92 | 1.07 |
| 294,912 | 389.85 | 0.92 |
| Cray XT5 (12 cores/node) | ||
| 21,396 | 2194 | – |
| 30,036 | 1177 | 1.24 |
| 38,676 | 806 | 1.10 |
| 97,428 | 280 | 1.07 |
| 190,740 | 206 | .68 |