EC/CUDA One-shot Kernel with Cooperative Launch

NVIDIA HPC-X Software Toolkit Rev 2.19.0

This feature improves GPU collective performance by utilizing the CUDA cooperative launch feature. It enables the use of a single CUDA kernel for CUDA operations in UCC GPU collectives.

This feature can be activated by enabling the UCC environment variable UCC_EC_CUDA_USE_COOPERATIVE_LAUNCH as follows:

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UCC_EC_CUDA_USE_COOPERATIVE_LAUNCH=1

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