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Reply To: Multi-mesh


No, currently there is no GPU support in OpenLB – however this is at the moment the main focus of my work. The next release will also include support for vectorization on CPUs which also delivers significant speedups.

Which parallel mode did you use? OpenMPI or OpenMP? For OpenMPI our efficiency is around ~80% so you should be able to get your desired timesteps per second by parallel execution on CPUs. Of course if you want to do this on a single host then there is no real way around GPUs – which is one of the reasons why I am focusing on it. E.g. a GPU LBM code of my own in some cases easily outperforms simulations on ~12 nodes of a small cluster using just a single GPU. This is also driven by the desire to fully utilize our new supercomputer at KIT.