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

NCCL Release 2.12.10

This is the NCCL 2.12.10 release notes. For previous NCCL release notes, refer to the NCCL Archives.


NCCL 2.12.10 has been tested with the following:

Key Features and Enhancements

This NCCL release includes the following key features and enhancements.

  • Improved error messages for network errors, with hostname instead of IP address.

Fixed Issues

The following issues have been resolved in NCCL 2.12.10:
  • Fixed bug with collNet.

  • Fixed bug with zero-byte send/recv operations.

  • Fixed NCCL_PARAM implementation taking a lock every time a parameter value was queried.

  • Fixed bug when setting NCCL_IB_QPS_PER_CONNECTION to more than one.