CUB 1.17.0

CUB 1.17.0

Summary

CUB 1.17.0 is the final minor release of the 1.X series. It provides a variety of bug fixes and miscellaneous enhancements, detailed below.

Known Issues

“Run-to-run” Determinism Broken

Several CUB device algorithms are documented to provide deterministic results (per device) for non-associative reduction operators (e.g. floating-point addition). Unfortunately, the implementations of these algorithms contain performance optimizations that violate this guarantee. The DeviceReduce::ReduceByKey and DeviceScan algorithms are known to be affected. We’re currently evaluating the scope and impact of correcting this in a future CUB release. See NVIDIA/cub#471 for details.

Bug Fixes

• #444: Fixed DeviceSelect to work with discard iterators and mixed input/output types.
• #452: Fixed install issue when CMAKE_INSTALL_LIBDIR contained nested directories. Thanks to @robertmaynard for this contribution.
• #462: Fixed bug that produced incorrect results from DeviceSegmentedSort on sm_61 and sm_70.
• #464: Fixed DeviceSelect::Flagged so that flags are normalized to 0 or 1.
• #468: Fixed overflow issues in DeviceRadixSort given num_items close to 2^32. Thanks to @canonizer for this contribution.
• #498: Fixed compiler regression in BlockAdjacentDifference. Thanks to @MKKnorr for this contribution.

Other Enhancements

• #445: Remove device-sync in DeviceSegmentedSort when launched via CDP.
• #449: Fixed invalid link in documentation. Thanks to @kshitij12345 for this contribution.
• #450: BlockDiscontinuity: Replaced recursive-template loop unrolling with #pragma unroll. Thanks to @kshitij12345 for this contribution.
• #451: Replaced the deprecated TexRefInputIterator implementation with an alias to TexObjInputIterator. This fully removes all usages of the deprecated CUDA texture reference APIs from CUB.
• #456: BlockAdjacentDifference: Replaced recursive-template loop unrolling with #pragma unroll. Thanks to @kshitij12345 for this contribution.
• #466: cub::DeviceAdjacentDifference API has been updated to use the new OffsetT deduction approach described in #212.
• #470: Fix several doxygen-related warnings. Thanks to @karthikeyann for this contribution.