NVIDIA Deep Learning NCCL Documentation
Release Notes (PDF) - v2.21.5 - Last updated April 5, 2024

NCCL Release 2.6.4

This is the NCCL 2.6.4 release notes. For previous NCCL release notes, refer to the NCCL Archives.

Key Features and Enhancements

This NCCL release includes the following key features and enhancements.
  • Added support for in-network collectives (beta)

  • Added support for adaptive routing on Infiniband

  • Added support for topology dump/injection through XML files

  • Added speed detection for PCI, Infiniband and Ethernet cards

  • Added CPU detection for AMD CPUs and ARM