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Add libcu++ dependency; initial round of NV_IF_TARGET ports.
#448
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NV_IF_TARGET ports.
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type: enhancement
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We'll need to use |
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nvc++ will stop defining __NVCOMPILER_CUDA_ARCH__ soon, removing the ability to determine the PTX arch at compile time. This updates agents and collective algorithms to no longer require the PTX_ARCH template parameter, and changes the CUB_WARP_SIZE(PTX_ARCH), etc helpers to ignore their argument. These macros only differed on obsolete arches and have no effect on currently supported architectures.
This fixes the issue reported in NVIDIA#299. There's no clear reason why this should use `RandomBits` unconditionally.
The merge sort test with pow2 >20 fails on GTX 1650. Detect bad_alloc failures and skip those tests. Tests for smaller problem sizes will still fail if there's a bad_alloc.
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Requires NVIDIA/thrust#1605.
This PR contains an initial set of changes necessary to migrate Thrust and CUB to NV_IF_TARGET and remove dependence on
__CUDA_ARCH__. It does not fully remove all usages of__CUDA_ARCH__, but rather focuses on the following:#ifdef __CUDA_ARCH__to useNV_IF_TARGET.This also includes various bug fixes for issues exposed by the above.
Future PRs will address the remaining usages of
__CUDA_ARCH__in the CDP macros and the kernel dispatch infrastructure.Pre-written Release Notes
Breaking Changes
NV_IF_TARGETports. #448 Add libcu++ dependency.NV_IF_TARGETports. #448: The following macros are no longer defined by default. They can be re-enabled by definingCUB_PROVIDE_LEGACY_ARCH_MACROS. These will be completely removed in a future release.CUB_IS_HOST_CODE: Replace withNV_IF_TARGET.CUB_IS_DEVICE_CODE: Replace withNV_IF_TARGET.CUB_INCLUDE_HOST_CODE: Replace withNV_IF_TARGET.CUB_INCLUDE_DEVICE_CODE: Replace withNV_IF_TARGET.Other Enhancements
NV_IF_TARGETports. #448: Removed special case code for unsupported CUDA architectures.NV_IF_TARGETports. #448: Replace several usages of__CUDA_ARCH__with<nv/target>to handle host/device code divergence.NV_IF_TARGETports. #448: Mark unused PTX arch parameters as legacy.