1. What's New

Welcome to the 23.3 version of the NVIDIA HPC SDK, a comprehensive suite of compilers and libraries enabling developers to program the entire HPC platform, from the GPU foundation to the CPU and out through the interconnect. The 23.3 release of the HPC SDK includes new features as well as important functionality and performance improvements.

  • New SUSE Linux Enterprise Server (SLES) RPM packages for Arm Server are now available.
  • The HPC Compilers now include the option -Ofast, which is similar to the same option in GCC and LLVM. It is an alias of options -O3 -Mfprelaxed [-Mstack_arrays]. This option enables aggressive optimizations at the cost of reduced floating point precision. -Mstack_arrays is automatically disabled when -Ofast is combined with -stdpar=gpu.
  • CUDA Fortran extends support for the NVIDIA Hopper GPU architecture with support for thread block clusters and programming for distributed shared memory.
  • The HPC Compilers now provide the -tp=neoverse-v2 option to target code generation on Arm Neoverse-V2 CPUs.
  • The HPC Compilers have added support for the C/C++ pure function attribute: declaring a function with __attribute__((pure)) indicates that the function has no side effects other than the return value. This can allow for optimization pure function calls.
  • Improved color diagnostic messages from CMake may be enabled with the -fdiagnostics-color option.
  • The value of the __cplusplus macro in C++20 or C++23 mode when building against GCC 8 or GCC 9, and the value of the macro in C++23 mode when building against GCC 11 or newer, now matches the value of __cplusplus that GCC uses in those modes.
  • NVC++ no longer demangles mangled names in CCFF info by default. Users of the CCFF info API will need to do this demangling themselves, or add -Mccff=demangle to the nvc++ command line.
  • LLVM 16 is now supported and integrated into the HPC Compilers.

2. Release Component Versions

The NVIDIA HPC SDK 23.3 release contains the following versions of each component:

Table 1. HPC SDK Release Components
  Linux_x86_64 Linux_ppc64le Linux_aarch64
  CUDA 11.0 CUDA 11.8 CUDA 12.0 CUDA 11.0 CUDA 11.8 CUDA 12.0 CUDA 11.0 CUDA 11.8 CUDA 12.0
nvc++ 23.3 23.3 23.3
nvc 23.3 23.3 23.3
nvfortran 23.3 23.3 23.3
nvcc 11.0.221 11.8.89 12.0.146 11.8.89 11.0.221 12.0.146 11.0.221 11.8.89 12.0.146
NCCL 2.17.1 2.17.1 2.17.1 2.17.1 2.17.1 2.17.1 2.17.1 2.17.1 2.17.1
NVSHMEM 2.8.0 2.8.0 2.8.0 2.8.0 2.8.0 2.8.0 N/A N/A N/A
cuFFTMp N/A 11.0.5 11.0.5 N/A 11.0.5 11.0.5 N/A N/A N/A
cuTENSOR 1.6.2 1.6.2 1.6.2 1.6.2 1.6.2 1.6.2 1.6.2 1.6.2 1.6.2
Nsight Compute 2023.1.0 2023.1.0 2023.1.0
Nsight Systems 2023.1.1.127 2023.1.1.127 2023.1.1.127
OpenMPI 3.1.5 3.1.5 3.1.5
HPC-X 2.14 N/A 2.14
OpenBLAS 0.3.20 0.3.20 0.3.20
Scalapack 2.2.0 2.2.0 2.2.0
Thrust 1.9.9 1.15.1 2.0.1 1.9.9 1.15.1 2.0.1 1.9.9 1.15.1 2.0.1
CUB 1.9.9 1.15.1 2.0.1 1.9.9 1.15.1 2.0.1 1.9.9 1.15.1 2.0.1
libcu++ 1.0.0 1.8.1 1.9.0 1.0.0 1.8.1 1.9.0 1.0.0 1.8.1 1.9.0

3. Supported Platforms

3.1. Platform Requirements for the HPC SDK

Table 2. HPC SDK Platform Requirements
Architecture Linux Distributions Minimum gcc/glibc Toolchain Minimum CUDA Driver

CentOS 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9
CentOS 8.0, 8.1, 8.2
Fedora 29, 30, 31, 32, 33, 34
OpenSUSE Leap 15.0, 15.1, 15.2
RHEL 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9
RHEL 8.0, 8.1, 8.4, 8.5, 8.6
SLES 12SP4, 12SP5, 15, 15SP1, 15SP2, 15SP3
Ubuntu 18.04, 20.04, 22.04
Rocky Linux 8.0

C99: 4.8
C11: 4.9
C++03: 4.8
C++11: 4.9
C++14: 5.1
C++17: 7.1
C++20: 10.1


RHEL 7.3, 7.4, 7.5, 7.6, 7.7, 8.0, 8.1, 8.3, 8.4, 8.6
RHEL Pegas 7.5, 7.6
Ubuntu 18.04

C99: 4.8
C11: 4.9
C++03: 4.8
C++11: 4.9
C++14: 5.1
C++17: 7.1
C++20: 10.1


CentOS 8.0, 8.1, 8.2, 8.3, 8.4
RHEL 8.1, 8.2, 8.6
Ubuntu 18.04, 20.04, 22.04
Amazon Linux 2

C99: 4.8
C11: 4.9
C++03: 4.8
C++11: 4.9
C++14: 5.1
C++17: 7.1
C++20: 10.1


Programs generated by the HPC Compilers for x86_64 processors require a minimum of AVX instructions, which includes Sandy Bridge and newer CPUs from Intel, as well as Bulldozer and newer CPUs from AMD. POWER 8 and POWER 9 CPUs from the POWER architecture are supported. The HPC SDK includes support for v8.1+ Server Class Arm CPUs that meet the requirements appendix E specified in the SBSA 7.1 specification.

The HPC Compilers are compatible with gcc and g++ and use the GCC C and C++ libraries; the minimum compatible versions of GCC are listed in Table 2. The minimum system requirements for CUDA and NVIDIA Math Library requirements are available in the NVIDIA CUDA Toolkit documentation.

3.2. Supported CUDA Toolchain Versions

The NVIDIA HPC SDK uses elements of the CUDA toolchain when building programs for execution with NVIDIA GPUs. Every HPC SDK installation package puts the required CUDA components into an installation directory called [install-prefix]/[arch]/[nvhpc-version]/cuda.

An NVIDIA CUDA GPU device driver must be installed on a system with a GPU before you can run a program compiled for the GPU on that system. The NVIDIA HPC SDK does not contain CUDA Drivers. You must download and install the appropriate CUDA Driver from NVIDIA , including the CUDA Compatibility Platform if that is required.

The nvaccelinfo tool prints the CUDA Driver version in its output. You can use it to find out which version of the CUDA Driver is installed on your system.

The NVIDIA HPC SDK 23.3 includes the following CUDA toolchain versions:
  • CUDA 11.0
  • CUDA 11.8
  • CUDA 12.0
The minimum required CUDA driver versions are listed in the table in Section 3.1.

4.  Known Limitations

  • The -Mipa option has been disabled for the 23.3 version of the HPC Compilers.
  • The latest version of cuSolverMp ( bundled with this release has two new dependencies on UCC and UCX libraries. To execute a program linked against cuSolverMP, please use the “nvhpc-hpcx” environment module for the HPC-X library, or set the environment variable LD_LIBRARY_PATH as follows: LD_LIBRARY_PATH=${NVHPCSDK_HOME}/comm_libs/hpcx/latest/ucc/lib:${NVHPCSDK_HOME}/comm_libs/hpcx/latest/ucx/lib:$LD_LIBRARY_PATH
  • When using the bundled OpenMPI 4 or HPC-X on Hopper-based systems, CUDA P2P is disabled.
  • The 2.14 version of HPC-X shipped in HPC SDK 23.3 does not support CUDA 12.0.
  • If not using the provided modulefiles, prior to using HPC-X, users should take care to source the hpcx-init.sh script: $ . /[install-path]/Linux_x86_64/dev/comm_libs/hpcx/hpcx-2.11/hpcx-init.sh Then, run the hpcx_load function defined by this script: $ hpcx_load These actions will set important environment variables that are needed when running HPC-X. The following warning from HPC-X while running an MPI job – “WARNING: Open MPI tried to bind a process but failed. This is a warning only; your job will continue, though performance may be degraded” – is a known issue, and may be worked around as follows: export OMPI_MCA_hwloc_base_binding_policy=""
  • Fortran derived type objects with zero-size derived type allocatable components that are used in sourced allocation or allocatable assignment may result in a runtime segmentation violation.
  • When using -⁠stdpar to accelerate C++ parallel algorithms, the algorithm calls cannot include virtual function calls or function calls through a function pointer, cannot use C++ exceptions, can only dereference pointers that point to the heap, and must use random access iterators (raw pointers as iterators work best).

5.  Deprecations and Changes

  • Support for the Ubuntu 18.04 operating system will be removed in the HPC SDK version 23.5, corresponding with the upstream end-of-life (EOL).
  • Corresponding with the release of new upcoming CUDA Toolkit versions, all three bundled CUDA versions included in the HPC SDK "multi" packages will be updated.
  • Support for CUDA Fortran textures is deprecated in CUDA 11.0 and 11.8, and has been removed from CUDA 12.
  • cudaDeviceSynchronize() in CUDA Fortran has been deprecated, and support has been removed from device code. It is still supported in host code.
  • Starting with the 21.11 version of the NVIDIA HPC SDK, the HPC-X package is no longer shipped as part of the packages made available for the POWER architecture.
  • Starting with the 21.5 version of the NVIDIA HPC SDK, the -cuda option for NVC++ and NVFORTRAN no longer automatically links the NVIDIA GPU math libraries. Please refer to the -cudalib option.
  • HPC Compiler support for the Kepler architecture of NVIDIA GPUs was deprecated starting with the 21.3 version of the NVIDIA HPC SDK.
  • Support for the KNL architecture of multicore CPUs in the NVIDIA HPC SDK was removed in the HPC SDK version 21.3.




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