... | ... | @@ -6,8 +6,11 @@ We provide a list of the performance variables that enhance or modify the code |
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- **GPU**=[x] (Default: 0) Set to 1 to enable GPU usage, set to 0 to use only the CPU. The GPU will be used to calculate the probabilities for all particle-images. The preparation of projections and PSF convolutions will be processed by the CPU. This is arranged in a pipeline to ensure continuous GPU utilization.
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- **GPUDEVICE**=[x] (Default: fastest) Only relevant if GPU=1
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– If this is not set, BioEM will autodetect the fastest GPU. Only possible if MPI is not used.
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– If x >= 0, BioEM will use GPU number x. Only possible if MPI is not used.
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– If x = -1, BioEM runs with N MPI threads, and the system has G GPUs, then BioEM will use GPU with number (N % G). The idea is that one can place multiple MPI processes on one node, and each will use a different GPU. For a multi-node configuration, one must make sure that consecutive MPI ranks are placed on the same node, i.e. four processes on two nodes (node0 and node1) must be placed as (node0, node0, node1, node1) and not as (node0, node1, node0, node1), because in the latter case only 1 GPU per node will be used (by two MPI processes each).
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