nccl¶
Description¶
The NVIDIA Collective Communication Library (NCCL) implements multi-GPU and multi-node communication primitives optimized for NVIDIA GPUs and Networking. NCCL provides routines such as all-gather, all-reduce, broadcast, reduce, reduce-scatter as well as point-to-point send and receive that are optimized to achieve high bandwidth and low latency over PCIe and NVLink high-speed interconnects within a node and over NVIDIA Mellanox Network across nodes.
Environment Modules¶
Run module spider nccl to find out what environment modules are available for this application.
Environment Variables¶
- HPC_NCCL_DIR - Installation Directory
- HPC_NCCL_BIN - Executable Directory
- HPC_NCCL_LIB - Library Directory
- NCCL_HOME - HPC_NVHPC_DIR
Categories¶
programming, library, gpu