NCCL Release 2.12.12
This is the NCCL 2.12.12 release notes. For previous NCCL release notes, refer to the NCCL Archives.
Compatibility
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Deep learning framework containers. Refer to the Support Matrix for the supported container version.
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This NCCL release supports CUDA 10.2, CUDA 11.0, CUDA 11.6, and CUDA 11.7.
Key Features and Enhancements
This NCCL release includes the following key features and enhancements.
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Improved allreduce performance when you have more than one network interface per GPU and you need to use PXN to close rings.
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Added P2P_DIRECT_DISABLE parameter to disable direct access to pointers within a process.
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Added support for PCI Gen5 on 5.4 kernels.
Fixed Issues
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Fixed hang on cubemesh topologies.
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Fixed random crash in init due to uninitialized struct.
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Fixed crash when setting NCCL_SET_THREAD_NAME.
Updating the GPG Repository Key
To best ensure the security and reliability of our RPM and Debian package repositories, NVIDIA is updating and rotating the signing keys used by apt, dnf/yum, and zypper package managers beginning on April 27, 2022. Failure to update your repository signing keys will result in package management errors when attempting to access or install NCCL packages. To ensure continued access to the latest NCCL release, please follow the updated NCCL installation guide.