Version 450.51.06(Linux)/451.82(Windows)
Release notes for the Release 450 family of NVIDIA® Data Center GPU Drivers for Linux and Windows.
This edition of Release Notes describes the Release 450 family of NVIDIA® Data Center GPU Drivers for Linux and Windows. NVIDIA provides these notes to describe performance improvements, bug fixes and limitations in each documented version of the driver.
1. Version Highlights
This section provides highlights of the NVIDIA Data Center GPU R450 Driver (version 450.51.06 Linux and 451.82 Windows).
This is a hotfix to the 450.51.05 driver release with the fixed issues listed below.
For changes related to the 450 release of the NVIDIA display driver, review the file "NVIDIA_Changelog" available in the .run installer packages.
Driver release date: 07/28/2020
1.1. Software Versions
07/28/2020: For this release, the software versions are listed below.
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CUDA Toolkit 11: 11.0.194 (cudadrt)
Note that starting with CUDA 11, individual components of the toolkit are versioned independently. For a full list of the individual versioned components (e.g. nvcc, CUDA libraries etc.), see the CUDA Toolkit Release Notes
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NVIDIA Data Center GPU Driver: 450.51.06 (Linux) / 451.82 (Windows)
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Fabric Manager: 450.51.06 (Use nv-fabricmanager -v)
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GPU VBIOS:
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92.00.19.00.01 (NVIDIA A100 SKU200 with heatsink for HGX A100 8-way and 4-way)
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92.00.19.00.02 (NVIDIA A100 SKU202 w/o heatsink for HGX A100 4-way)
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NVSwitch VBIOS: 92.10.14.00.01
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NVFlash: 5.641
Due to a revision lock between the VBIOS and driver, VBIOS versions >= 92.00.18.00.00 must use corresponding drivers >= 450.36.01. Older VBIOS versions will work with newer drivers.
1.2. Fixed Issues
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Fixed an issue where using CUDA_VISIBLE_DEVICES environment variable to restrict devices seen by CUDA on a multi-GPU A100 system (such as DGX A100 or HGX A100) may cause an out-of-memory error for some workloads, for example when running with CUDA IPC.
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Fixed an issue with ECC DBE handling on A100 resulting in an incorrect part of GPU memory being retired. The faulty memory would continue to be available even after resetting the GPU/rebooting the system and hitting the same DBE every time could make the GPU unusable.
1.3. Known Issues
General
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By default, Fabric Manager runs as a systemd service. If using DAEMONIZE=0 in the Fabric Manager configuration file, then the following steps may be required.
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Disable FM service from auto starting. (systemctl disable nvidia-fabricmanager)
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Once the system is booted, manually start FM process. (/usr/bin/nv-fabricmanager -c /usr/share/nvidia/nvswitch/fabricmanager.cfg). Note, since the process is not a daemon, the SSH/Shell prompt will not be returned (use another SSH shell for other activities or run FM as a background task).
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There is a known issue with cross-socket GPU to GPU memory consistency that is currently under investigation
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When starting the Fabric Manager service, the following error may be reported: detected NVSwitch non-fatal error 10003 on NVSwitch pci. This error is not fatal and no functionality is affected. This issue will be resolved in a future driver release.
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On NVSwitch systems with Windows Server 2019 in shared NVSwitch virtualization mode, the host may hang or crash when a GPU is disabled in the guest VM. This issue is under investigation.
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In some cases, after a system reboot, the first run of nvidia-smi shows an ERR! for the power status of a GPU in a multi-GPU A100 system. This issue is not observed when running with peristence mode.
GPU Performance Counters
The use of developer tools from NVIDIA that access various performance counters requires administrator privileges. See this note for more details. For example, reading NVLink utilization metrics from nvidia-smi (nvidia-smi nvlink -g 0) would require administrator privileges.
NoScanout Mode
NoScanout mode is no longer supported on NVIDIA Tesla products. If NoScanout mode was previously used, then the following line in the “screen” section of /etc/X11/xorg.conf should be removed to ensure that X server starts on Tesla products:
Option "UseDisplayDevice" "None"
Tesla products now support one display of up to 4K resolution.
Unified Memory Support
Some Unified Memory APIs (for example, CPU page faults) are not supported on Windows in this version of the driver. Review the CUDA Programming Guide on the system requirements for Unified Memory
CUDA and unified memory is not supported when used with Linux power management states S3/S4.
IMPU FRU for Volta GPUs
The driver does not support the IPMI FRU multi-record information structure for NVLink. See the Design Guide for Tesla P100 and Tesla V100-SXM2 for more information.Video Memory Support
For Windows 7 64-bit, this driver recognizes up to the total available video memory on Tesla cards for Direct3D and OpenGL applications.
For Windows 7 32-bit, this driver recognizes only up to 4 GB of video memory on Tesla cards for DirectX, OpenGL, and CUDA applications.
Experimental OpenCL Features
Select features in OpenCL 2.0 are available in the driver for evaluation purposes only.
The following are the features as well as a description of known issues with these features in the driver:
Device side enqueue
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The current implementation is limited to 64-bit platforms only.
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OpenCL 2.0 allows kernels to be enqueued with global_work_size larger than the compute capability of the NVIDIA GPU. The current implementation supports only combinations of global_work_size and local_work_size that are within the compute capability of the NVIDIA GPU. The maximum supported CUDA grid and block size of NVIDIA GPUs is available at http://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#computecapabilities. For a given grid dimension, the global_work_size can be determined by CUDA grid size x CUDA block size.
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For executing kernels (whether from the host or the device), OpenCL 2.0 supports non-uniform ND-ranges where global_work_size does not need to be divisible by the local_work_size. This capability is not yet supported in the NVIDIA driver, and therefore not supported for device side kernel enqueues.
Shared virtual memory
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The current implementation of shared virtual memory is limited to 64-bit platforms only.
2. Virtualization
To make use of GPU passthrough with virtual machines running Windows and Linux, the hardware platform must support the following features:
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A CPU with hardware-assisted instruction set virtualization: Intel VT-x or AMD-V.
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Platform support for I/O DMA remapping.
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On Intel platforms the DMA remapper technology is called Intel VT-d.
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On AMD platforms it is called AMD IOMMU.
Support for these feature varies by processor family, product, and system, and should be verified at the manufacturer's website.
Supported Hypervisors
The following hypervisors are supported:
3. Hardware and Software Support
Support for these feature varies by processor family, product, and system, and should be verified at the manufacturer's website.
Supported Operating Systems for NVIDIA Data Center GPUs
The Release 450 driver is supported on the following operating systems:
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Windows x86_64 operating systems:
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Microsoft Windows® Server 2019
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Microsoft Windows® Server 2016
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Microsoft Windows® 10
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The table below summarizes the supported Linux 64-bit distributions. For a complete list of distributions, kernel versions supported, see the CUDA Linux System Requirements documentation.
Distribution x86_64 POWER Arm64 Server OpenSUSE Leap 15.1 Yes No No Red Hat Enterprise Linux / CentOS 8.y (where y <= 2) Yes Yes Yes Red Hat Enterprise Linux / CentOS 7.y (where y <= 8) Yes No No SUSE Linux Enterprise Server 15.1 Yes No Yes (see note) Ubuntu 20.04 LTS Yes No No Ubuntu 18.04.z LTS (where z <= 4) Yes Yes Yes Ubuntu 16.04.z LTS (where z <= 6) Yes No No Note that SUSE Linux Enterprise Server (SLES) 15.1 is provided as a preview for Arm64 server since there are known issues when running some CUDA applications related to dependencies on glibc 2.27.
Supported Operating Systems and CPU Configurations for HGX A100
The Release 450 driver is validated with HGX A100 on the following operating systems and CPU configurations:
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Linux 64-bit distributions:
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Red Hat Enterprise Linux 8.1 (in 4/8/16-GPU configurations)
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CentOS Linux 7.7 (in 4/8/16-GPU configurations)
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Ubuntu 18.04.4 LTS (in 4/8/16-GPU configurations)
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SUSE SLES 15.1 (in 4/8/16-GPU configurations)
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Windows 64-bit distributions:
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Windows Server 2019 (in 4/8/16-GPU configurations)
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Supported Virtualization Configurations
The Release 450 driver is validated with HGX A100 on the following configurations:
API Support
This release supports the following APIs:
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NVIDIA® CUDA® 11.0 for NVIDIA® KeplerTM, MaxwellTM, PascalTM, VoltaTM, TuringTM and NVIDIA Ampere architecture GPUs
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OpenGL® 4.5
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Vulkan® 1.1
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DirectX 11
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DirectX 12 (Windows 10)
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Open Computing Language (OpenCLTM software) 1.2
Note that for using graphics APIs on Windows (i.e. OpenGL, Vulkan, DirectX 11 and DirectX 12) or any WDDM 2.0+ based functionality on Tesla GPUs, vGPU is required. See the vGPU documentation for more information.
Supported NVIDIA Data Center GPUs
The NVIDIA Data Center GPU driver package is designed for systems that have one or more Tesla products installed. This release of the driver supports CUDA C/C++ applications and libraries that rely on the CUDA C Runtime and/or CUDA Driver API.
NVIDIA Server Platforms | |
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Product | Architecture |
NVIDIA HGX A100 | A100 and NVSwitch |
NVIDIA HGX-2 | V100 and NVSwitch |
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