Figure 7
From: PKDGRAV3: beyond trillion particle cosmological simulations for the next era of galaxy surveys
Total runtime in node hours ( \(\pmb{\mbox{wall clock} \times \mbox{number}\ \mbox{of nodes}}\) ). The red circles are measurements of a simulation run on Titan with 320 nodes. The dashed lines are predictions based on both weak and strong scaling. The much larger Tödi simulation was run on 214 nodes while the even larger Daint run used 4,900, and later 4,000 nodes. All measurements show excellent agreement with the predictions.