Add support for multiple data types (remainder of #196) #203
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Oct 9, 2020
Addresses #95 and #111. Follow-up to #198, #199, #201 Trying again, since #130 failed. This time, I made the Model class to be polymorphic. This way, the amount of pointer indirection is minimized. Summary: Model is an opaque container that wraps the polymorphic handle ModelImpl<ThresholdType, LeafOutputType>. The handle in turn stores the list of trees Tree<ThresholdType, LeafOutputType>. To unbox the Model container and obtain ModelImpl<ThresholdType, LeafOutputType>, use Model::Dispatch(<lambda expression>). Also, upgrade to C++14 to access the generic lambda feature, which proved to be very useful in the dispatching logic for the polymorphic Model class. * Turn the Model and Tree classes into template classes * Revise the string templates so that correct data types are used in the generated C code * Rewrite the model builder class * Revise the zero-copy serializer * Create an abstract matrix class that supports multiple data types (float32, float64 for now). * Move the DMatrix class to the runtime. * Extend the DMatrix class so that it can hold float32 and float64. * Redesign the C runtime API using the DMatrix class. * Ensure accuracy of scikit-learn models. To achieve the best results, use float32 for the input matrix and float64 for the split thresholds and leaf outputs. * Revise the JVM runtime.
This was referenced Oct 9, 2020
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Addresses #95 and #111.
Follow-up to #198, #199, #201
Trying again, since #130 failed. This time, I made the
Modelclass to be polymorphic. This way, the amount of pointer indirection is minimized.Summary:
Modelis an opaque container that wraps the polymorphic handleModelImpl<ThresholdType, LeafOutputType>. The handle in turn stores the list of treesTree<ThresholdType, LeafOutputType>. To unbox theModelcontainer and obtainModelImpl<ThresholdType, LeafOutputType>, useModel::Dispatch(<lambda expression>).Also, upgrade to C++14 to access the generic lambda feature, which proved to be very useful in the dispatching logic for the polymorphic
Modelclass.