Appendix

Levenberg-Marquardt algorithm

A flowchart of the implementation of the Levenberg-Marquardt algorithm is given in Fig. 2.

Fig. 2 Levenberg-Marquardt algorithm flow as implemented in the Gpufit library.

Performance comparison to other GPU benchmarks

Using the bundled application (initial release created with CUDA runtime 8.0) to estimate the fitting speed per second of 10 million fits for various CUDA capable graphics cards of various architectures (on different computers with different versions of graphics drivers) we can compare to the results of Passmark G3D. By and large, the results seem to correlate, i.e. a high Passmark G3D score also relates to a high Gpufit fitting speed.

Fig. 3 Performance of Gpufit vs Passmark G3D