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Kenneth Moreland authored
The `DeviceAdapter` provides an abstract interface to the accelerator devices worklets and other algorithms run on. As such, the programmer has less control about how the device launches each worklet. Each device adapter has its own configuration parameters and other ways to attempt to optimize how things are run, but these are always a universal set of options that are applied to everything run on the device. There is no way to specify launch parameters for a particular worklet. To provide this information, VTK-m now supports `Hint`s to the device adapter. The `DeviceAdapterAlgorithm::Schedule` method takes a templated argument that is of the type `HintList`. This object contains a template list of `Hint` types that provide suggestions on how to launch the parallel execution. The device adapter will pick out hints that pertain to it and adjust its launching accordingly. These are called hints rather than, say, directives, because they don't force the device adapter...
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