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GPU Programming page (#325)
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* New version of the GPU programming section.

* Added abstractions.

* Added OneProf

* Added GPU programming wiht Julia.
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isazi committed Aug 8, 2024
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* [Bash](/best_practices/language_guides/bash.md)
* [JavaScript and TypeScript](/best_practices/language_guides/javascript.md)
* [Python](/best_practices/language_guides/python.md)
* [OpenCL and CUDA](/best_practices/language_guides/opencl_cuda.md)
* [GPU](/best_practices/language_guides/opencl_cuda.md)
* [R](/best_practices/language_guides/r.md)
* [C and C++](/best_practices/language_guides/ccpp.md)
* [Fortran](/best_practices/language_guides/fortran.md)
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# OpenCL & CUDA
# GPU Programming Languages

*Page maintainer: Alessio Sclocco* [@isazi](https://github.com/isazi)


## Sources for learning
*please add university courses and informative videos*
* Parallel Reduction [[Slides](http://developer.download.nvidia.com/compute/cuda/1.1-Beta/x86_website/projects/reduction/doc/reduction.pdf)]
* GPU Memory bootcamp - Tony Scudiero [[git repo](https://github.com/tscudiero/MemBootcamp)]
* Best Practices [[Slides](https://github.com/tscudiero/MemBootcamp/blob/master/Slides/S5353_Scudiero_Bootcamp1.pdf)] [[Video](http://on-demand.gputechconf.com/gtc/2015/video/S5353.html)]
* Beyond the Best Practices [[Slides](https://github.com/tscudiero/MemBootcamp/blob/master/Slides/S5376-Scudiero_Bootcamp2.pdf)] [[Video](http://on-demand.gputechconf.com/gtc/2015/video/S5376.html)]
* Collaborative Access Patterns [[Slides](https://github.com/tscudiero/MemBootcamp/blob/master/Slides/S6181-Scudiero_Bootcamp3.pdf)] [[Video](http://on-demand.gputechconf.com/gtc/2016/video/s6181-tony-scudiero-bootcamp-3.mp4)]
* CUB: CUDA Collective primitives library [[Git](https://github.com/NVlabs/cub)] [[Slides](http://on-demand.gputechconf.com/gtc/2015/presentation/S5617-Duane-Merrill.pdf)] [[Video](http://on-demand.gputechconf.com/gtc/2015/video/S5617.html)]
* Best Practices Guide by PRACE [[HTML](https://prace-ri.eu/training-support/best-practice-guides/best-practice-guide-gpgpu/)] [[PDF](https://prace-ri.eu/wp-content/uploads/Best-Practice-Guide_GPGPU.pdf)]

## Learning Resources

* Carpentries GPU Programming course
* [Lesson material](https://carpentries-incubator.github.io/lesson-gpu-programming/)
* Introduction to CUDA C
* [Slides](http://developer.download.nvidia.com/compute/developertrainingmaterials/presentations/cuda_language/Introduction_to_CUDA_C.pptx)
* [Video](http://on-demand.gputechconf.com/gtc/2012/video/S0624-Monday-Introduction-to-CUDA-C.mp4)
* Introduction to OpenACC
* [Slides](http://developer.download.nvidia.com/compute/developertrainingmaterials/presentations/openacc/Introduction_To_OpenACC.pptx)
* Introduction to HIP Programming
* [Video](https://www.youtube.com/watch?v=3ejUwypP0bI)
* SYCL Introduction and Best Practices
* [Video](https://www.youtube.com/watch?v=TbkrODiVDQY)
* CSCS GPU Programming with Julia
* [Course recordings](https://github.com/omlins/julia-gpu-course)

## Documentation
* OpenCL specification [[1.2](https://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/)] [[2.0](https://www.khronos.org/registry/cl/sdk/2.0/docs/man/xhtml/)]
* CUDA Toolkit [[latest](http://docs.nvidia.com/cuda/index.html)]
* [CUDA Programming Guide](http://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html)
* [CUDA Runtime API](http://docs.nvidia.com/cuda/cuda-runtime-api/index.html)


## Source-to-source translation between CUDA and OpenCL
* vtsynergy (https://github.com/vtsynergy)
* This was shown to work on DAS5 after copying /usr/include/limits.h to $PWD and commenting out the lines around # include_next (122-125) :
"cu2cl-tool host_code.cc device_code.cu -- -DGPU_ON -I$PWD:/usr/include -I/usr/lib/gcc/x86_64-redhat-linux/4.8.2/include".
* cutocl (https://github.com/benvanwerkhoven/cutocl)


## Overview of libraries
* OpenCL-based libraries
* [CLBlast](https://github.com/CNugteren/CLBlast)
* [clFFT](https://github.com/clMathLibraries/clFFT)
* CUDA-based libraries
* CUDA
* [C programming guide](https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html)
* [Runtime API](https://docs.nvidia.com/cuda/cuda-runtime-api/)
* [Driver API](https://docs.nvidia.com/cuda/cuda-driver-api/index.html)
* [Fortran programming guide](https://docs.nvidia.com/hpc-sdk/compilers/cuda-fortran-prog-guide/index.html)
* HIP
* [Kernel language syntax](https://rocm.docs.amd.com/projects/HIP/en/latest/reference/kernel_language.html)
* [Runtime API](https://rocm.docs.amd.com/projects/HIP/en/latest/.doxygen/docBin/html/modules.html)
* SYCL
* [Specification](https://registry.khronos.org/SYCL/specs/sycl-2020/html/sycl-2020.html)
* [Reference guide](https://www.khronos.org/files/sycl/sycl-2020-reference-guide.pdf)
* OpenCL
* [Guide](https://github.com/KhronosGroup/OpenCL-Guide)
* [API](https://registry.khronos.org/OpenCL/specs/3.0-unified/html/OpenCL_API.html)
* [OpenCL C specification](https://registry.khronos.org/OpenCL/specs/3.0-unified/html/OpenCL_C.html)
* [Reference guide](https://www.khronos.org/files/opencl30-reference-guide.pdf)
* OpenACC
* [Programming guide](https://www.openacc.org/sites/default/files/inline-files/OpenACC_Programming_Guide_0_0.pdf)
* [Reference guide](https://www.openacc.org/sites/default/files/inline-files/API%20Guide%202.7.pdf)
* OpenMP
* [Reference guide](https://www.openmp.org/wp-content/uploads/OpenMPRef-5.0-111802-web.pdf)

## Overview of Libraries

* CUDA
* [cuBLAS](http://docs.nvidia.com/cuda/cublas/index.html)
* [NVBLAS](http://docs.nvidia.com/cuda/nvblas/index.html)
* [cuFFT](http://docs.nvidia.com/cuda/cufft/index.html)
* [cuGRAPH](https://docs.rapids.ai/api/cugraph/stable/)
* [cuRAND](http://docs.nvidia.com/cuda/curand/index.html)
* [cuSPARSE](http://docs.nvidia.com/cuda/cusparse/index.html)
* HIP
* [hipBLAS](https://rocm.docs.amd.com/projects/hipBLAS/en/latest/index.html)
* [hipFFT](https://rocm.docs.amd.com/projects/hipFFT/en/latest/index.html)
* [hipRAND](https://rocm.docs.amd.com/projects/hipRAND/en/latest/index.html)
* [hipSPARSE](https://rocm.docs.amd.com/projects/hipSPARSE/en/latest/index.html)
* SYCL
* [OneAPI BLAS](https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-dpcpp/2024-0/blas-routines.html#GUID-F277361F-49BA-437B-8100-3D2B6BBC3CC1)
* [OneAPI FFT](https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-dpcpp/2024-0/fourier-transform-functions.html#GUID-BB8891E9-D3D3-40B9-BBB1-2390C4340CDA)
* [OneAPI sparse](https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-dpcpp/2024-0/sparse-blas-routines.html#GUID-7123D31B-9C7F-4BA7-9792-02A417293E60)
* [OneAPI random number generators](https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-dpcpp/2024-0/random-number-generators.html#GUID-FFC80D12-C323-4A9F-83E3-D0ACDB686876)
* OpenCL
* [CLBlast](https://github.com/CNugteren/CLBlast)
* [clFFT](https://github.com/clMathLibraries/clFFT)

## Source-to-source Translation

* CUDA to HIP
* [hipify](https://github.com/ROCm/HIPIFY)
* CUDA to SYCL
* [SYCLomatic](https://github.com/oneapi-src/SYCLomatic)
* CUDA to OpenCL
* [cutocl](https://github.com/benvanwerkhoven/cutocl)

## Foreign Function Interfaces

* C++
* CUDA
* [cudawrappers](https://github.com/nlesc-recruit/cudawrappers)
* OpenCL
* [CLHPP](https://github.com/KhronosGroup/OpenCL-CLHPP)
* Python
* CUDA
* [PyCuda](https://mathema.tician.de/software/pycuda/)
* [CuPy](https://cupy.dev/)
* [cuda-python](https://nvidia.github.io/cuda-python/)
* HIP
* [PyHIP](https://github.com/jatinx/PyHIP)
* SYCL
* [dpctl](https://github.com/IntelPython/dpctl)
* OpenCL
* [PyOpenCL](https://mathema.tician.de/software/pycuda/)
* Julia
* CUDA
* [CUDA.jl](https://github.com/JuliaGPU/CUDA.jl)
* HIP
* [AMDGPU.jl](https://github.com/JuliaGPU/AMDGPU.jl)
* SYCL
* [oneAPI.jl](https://github.com/JuliaGPU/oneAPI.jl)
* Java
* CUDA
* [JCuda](http://www.jcuda.org/)
* OpenCL
* [JOCL](http://www.jocl.org/)

## High-Level Abstractions

* C++
* [Kokkos](https://github.com/kokkos/kokkos)
* [Raja](https://github.com/LLNL/RAJA)
* Python
* [Numba](https://numba.pydata.org/)
* [pykokkos](https://github.com/kokkos/pykokkos)

## Foreign Function Interfaces for CUDA and OpenCL
* C++: [[Cuda](https://github.com/eyalroz/cuda-api-wrappers/)], [[OpenCL](https://github.com/KhronosGroup/OpenCL-CLHPP)]
* Python: [[PyCuda](https://mathema.tician.de/software/pycuda/)], [[PyOpenCL](https://mathema.tician.de/software/pycuda/)]
* Java: [[JCuda](http://www.jcuda.org/)], [[JOCL](http://www.jocl.org/)]

## Debugging and Profiling Tools

## Testing
* Unit Testing
* Example of a unit test for CUDA kernel using the [Kernel Tuner](https://github.com/benvanwerkhoven/kernel_tuner/blob/master/examples/cuda/test_vector_add.py)
* [comparing floating-point results](http://docs.nvidia.com/cuda/floating-point/index.html)
* CUDA
* [Nsight Systems](https://developer.nvidia.com/nsight-systems)
* [Nsight Compute](https://developer.nvidia.com/nsight-compute)
* [CUDA-GDB](http://docs.nvidia.com/cuda/cuda-gdb/index.html)
* [compute-sanitizer](https://docs.nvidia.com/compute-sanitizer/index.html)
* HIP
* [omniperf](https://github.com/AMDResearch/omniperf)
* [rocprof](https://github.com/ROCm/rocprofiler)
* SYCL
* [oneprof](https://github.com/intel/pti-gpu/tree/master/tools/oneprof)
* [onetrace](https://github.com/intel/pti-gpu/tree/master/tools/onetrace)

## Performance Optimization

## Debugging and Profiling Tools
* [Nvidia Visual Profiler](https://developer.nvidia.com/nvidia-visual-profiler) [[User Guide](http://docs.nvidia.com/cuda/profiler-users-guide)]
* [CUDA-GDB](http://docs.nvidia.com/cuda/cuda-gdb/index.html)
* [compute-sanitizer](https://docs.nvidia.com/cuda/compute-sanitizer/index.html)
* [PRACE best practice guide on modern accelerators](https://zenodo.org/records/5839488)
* [CUDA best practices](https://docs.nvidia.com/cuda/cuda-c-best-practices-guide/index.html)
* [OneAPI SYCL best practices](https://www.intel.com/content/www/us/en/docs/oneapi/programming-guide/2023-2/optimize-your-sycl-applications.html)

## Auto-tuning

## Performance Optimization
* Resources:
* Better Performance at Lower Occupancy [[Slides](http://www.nvidia.com/content/gtc-2010/pdfs/2238_gtc2010.pdf)] [[Video](http://on-demand.gputechconf.com/gtc/2010/video/S12238-Better-Performance-at-Lower-Occupancy.mp4)]
* [Maxwell Tuning Guide](http://docs.nvidia.com/cuda/maxwell-tuning-guide)
* [Pascal Tuning Guide](http://docs.nvidia.com/cuda/pascal-tuning-guide)

* Generic Auto Tuners:
* [Kernel Tuner](https://github.com/benvanwerkhoven/kernel_tuner) (Python)
* [CLTune](https://github.com/CNugteren/CLTune) (C++)
* Kernel Tuner
* [GitHub repository](https://github.com/KernelTuner/kernel_tuner)
* [Documentation](https://kerneltuner.github.io/kernel_tuner/stable/)
* [Tutorial](https://github.com/KernelTuner/kernel_tuner_tutorial)

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