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Figure 7
Architecture of GPU-accelerated chunk computation for large-scale multi-parameter problems. In this figure, we assume M = 2 and denote the two scattering vectors by qx and qy. Chunking is performed along these two dimensions. All the model-parameter dimensions are conceptually represented by the p dimension. Left: given a SAS model and its parameter space, we compute G in chunks on a GPU and store it on disk if needed. Right: to compute any term in [\|{\boldepsilon}\|^{2}], Js or Hs that requires successive inner products with G, we chunk it along the q dimensions and load the corresponding chunk of G on a GPU to perform the inner products; the assembled results are then fed to the trust-region method to update the variables.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 55| Part 4| August 2022| Pages 966-977
https://doi.org/10.1107/S1600576722006379
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