Developer Guide and Reference

Intel® oneAPI Collective Communications Library

Intel® oneAPI Collective Communications Library (oneCCL) provides an efficient implementation of communication patterns used in deep learning.
oneCCL features include:
  • Built on top of lower-level communication middleware – Intel® MPI Library and libfabrics.
  • Optimized to drive scalability of communication patterns by allowing to easily trade off compute for communication performance.
  • Enables a set of DL-specific optimizations, such as prioritization, persistent operations, or out-of-order execution.
  • Works across various interconnects: Intel(R) Omni-Path Architecture, InfiniBand*, and Ethernet.
  • Provides common API sufficient to support communication workflows within Deep Learning / distributed frameworks (such as PyTorch*, Horovod*).
oneCCL package comprises the oneCCL Software Development Kit (SDK) and the Intel(R) MPI Library Runtime components.

Product and Performance Information

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Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.