Overview

The TauREx-CUDA plugin supplies drop-in models and contribution functions that allow for the exploitation of nVidia CUDA hardware.

Warning

TauREx-CUDA is only compatible with the cross-section opacity method.

To make use of the plugin, you can simply replace existing models and contributions with the CUDA-enabled ones. For example if we have a transit spectrum input file:

[Model]
model_type = transmission
    [[Absorption]]

    [[CIA]]
    cia_pairs = H2-H2, H2-He

    [[Rayleigh]]

The CUDA enabled version is simply:

[Model]
model_type = transmission_cuda
    [[AbsorptionCUDA]]

    [[CIACUDA]]
    cia_pairs = H2-H2, H2-He

    [[RayleighCUDA]]

The CUDA forward models can function with non-CUDA enabled contribution functions. We can mix the C++ Mie scattering code for the eclipse version:

[Model]
model_type = emission_cuda
    [[AbsorptionCUDA]]

    [[CIACUDA]]
    cia_pairs = H2-H2, H2-He

    [[RayleighCUDA]]

    [[BHMie]]

When non-CUDA contributions are included, they are first computed on the CPU before their results are transferred and the model is continued on the GPU.

Warning

The oppisite is not true. CUDA contributions are only compatible with CUDA forward models. Attempting to use them in non-CUDA forward models will result in an error.