Summary of the Operations

Summary of the Operations#

Basics#

  • transform applies a function to each element of the sequence, equivalent to the functional operation map

  • select takes the first N` elements of the sequence satisfying a condition (via a selection mask or a predicate function)

  • unique returns unique elements within a sequence

  • histogram generates a summary of the statistical distribution of the sequence

Aggregation#

  • reduce traverses the sequence while accumulating some data, equivalent to the functional operation fold_left

  • scan is the cumulative version of reduce which returns the sequence of the intermediate values taken by the accumulator

Differentiation#

  • adjacent_difference computes the difference between the current element and the previous or next one in the sequence

  • discontinuity detects value change between the current element and the previous or next one in the sequence

Rearrangement#

  • sort rearranges the sequence by sorting it. It could be according to a comparison operator or a value using a radix approach

  • exchange rearranges the elements according to a different stride configuration which is equivalent to a tensor axis transposition

  • shuffle rotates the elements

Partition/Merge#

  • partition divides the sequence into two or more sequences according to a predicate while preserving some ordering properties

  • merge merges two ordered sequences into one while preserving the order

Data Movement#

  • store stores the sequence to a continuous memory zone. There are variations to use an optimized path or to specify how to store the sequence to better fit the access patterns of the CUs.

  • load the complementary operations of the above ones.

  • memcpy copies bytes between device sources and destinations

Other operations#

  • run_length_encode generates a compact representation of a sequence

  • binary_search finds for each element the index of an element with the same value in another sequence (which has to be sorted)

  • config selects a kernel’s grid/block dimensions to tune the operation to a GPU

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