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

NCCL Release 2.9.9

This is the NCCL 2.9.9 release notes. For previous NCCL release notes, refer to the NCCL Archives.


NCCL 2.9.9 has been tested with the following:

Fixed Issues

The following issues have been resolved in NCCL 2.9.9:
  • Fixed crash when setting NCCL_MAX_P2P_NCHANNELS.

  • Fixed hang during sendrecv dynamic connection on cubemesh topologies.

  • Fixed compilation with TRACE=1.