NVIDIA OpenCL SDK Code Samples

The GPU Computing SDK includes 100+ code samples, utilities, whitepapers, and additional documentation to help you get started developing, porting, and optimizing your applications for the CUDA architecture. You can get quick access to many of the SDK resources on this page, SDK documentation, or download the complete SDK.

Please note that you may need to install the latest NVIDIA drivers and CUDA Toolkit to compile and run the code samples.

Refer to the SDK release notes for more information.


Using Inline PTX with OpenCL A simple test application that demonstrates a new CUDA 4.0 driver ability to embed PTX in a OpenCL kernel.		or later Browse Files


Marching Cubes Isosurfaces This sample extracts a geometric isosurface from a volume dataset using the marching cubes algorithm. It uses the scan (prefix sum) function from the oclScan SDK sample to perform stream compaction.		or later Browse Files


OpenCL Tridiagonal Efficient matrix solvers for large number of small independent tridiagonal linear systems. OpenCL implementation of 3 different solvers: Parallel Cyclic Reduction, Cyclic Reduction, Sweep (Gauss elimination + reordering optimization for full coalescing).		or later Browse Files


OpenCL Device Query This sample enumerates the properties of the OpenCL devices present in the system.		or later Browse Files


OpenCL Bandwidth Test This is a simple test program to measure the memcopy bandwidth of the GPU. It currently is capable of measuring device to device copy bandwidth, host to device and host to device copy bandwidth for pageable and page-locked memory, memory mapped and direct access.		or later Browse Files


OpenCL Vector Addition Element by element addition of two 1-dimensional arrays. Implemented in OpenCL for CUDA GPU's, with functional comparison against a simple C++ host CPU implementation.		or later Browse Files


OpenCL Dot Product Dot Product (scalar product) of set of input vector pairs. Implemented in OpenCL for CUDA GPU's, with functional comparison against a simple C++ host CPU implementation.		or later Browse Files


OpenCL Matrix Vector Multiplication Simple matrix-vector multiplication example showing increasingly optimized implementations.		or later Browse Files


OpenCL Overlapped Copy/Compute Sample Element by element hypotenuse for two 1-dimensional arrays. Implemented in OpenCL for CUDA GPU's, with functional comparison against a simple C++ host CPU implementation. Demonstrates overlapped copy/compute in 2 command queues		or later Browse Files


OpenCL Simple Multi-GPU This application demonstrates how to make use of multiple GPUs in OpenCL.		or later Browse Files


OpenCL Simple OpenGL Interop Simple program which demonstrates interoperability between OpenCL and OpenGL. The program modifies vertex positions with OpenCL and uses OpenGL to render the geometry.		or later Browse Files


OpenCL Scan This example demonstrates an efficient OpenCL implementation of parallel prefix sum, also known as "scan". Given an array of numbers, scan computes a new array in which each element is the sum of all the elements before it in the input array.		or later Browse Files


OpenCL Parallel Reduction A parallel sum reduction that computes the sum of large arrays of values. This sample demonstrates several important optimization strategies for parallel algorithms like reduction.		or later Browse Files


OpenCL Matrix Transpose Efficient matrix transpose.		or later Browse Files


OpenCL Matrix Multiplication This sample implements matrix multiplication and is exactly the same as Chapter 6 of the programming guide. It has been written for clarity of exposition to illustrate various OpenCL programming principles, not with the goal of providing the most performant generic kernel for matrix multiplication. CUBLAS provides high-performance matrix multiplication.		or later Browse Files


OpenCL 3D FDTD This sample applies a finite differences time domain progression stencil on a 3D surface.		or later Browse Files


OpenCL DCT 8x8 This sample demonstrates how Discrete Cosine Transform (DCT) for 8x8 blocks can be implemented in OpenCL.		or later Browse Files


OpenCL DirectX Texture Compressor (DXTC) High Quality DXT Compression using OpenCL. This example shows how to implement an existing computationally-intensive CPU compression algorithm in parallel on the GPU, and obtain an order of magnitude performance improvement.		or later Whitepaper Browse Files


OpenCL Radix Sort This sample demonstrates a very fast and efficient parallel radix sort implemented in OpenCL for CUDA GPUs.		or later Browse Files


OpenCL Sorting Networks This sample implements bitonic sort algorithm for batches of short arrays		or later Browse Files


OpenCL Black-Scholes Option Pricing This sample evaluates fair call and put prices for a given set of European options by Black-Scholes formula.		or later Whitepaper Browse Files


OpenCL Hidden Markov Model This sample implements a Hidden Markov Model in OpenCL for the GPU.		or later Browse Files


OpenCL Quasirandom Generator This sample implements Niederreiter quasirandom number generator and Moro's Inverse Cumulative Normal Distribution generator.		or later Browse Files


OpenCL Mersenne Twister This sample implements Mersenne Twister random number generator and Cartesian Box-Muller transformation on the GPU.		or later Browse Files


OpenCL 64-bin and 256-bin Histogram This sample demonstrates efficient implementation of 64-bin and 256-bin histograms.		or later Whitepaper Browse Files


OpenCL Post-Process OpenGL-Rendered Image This sample shows how to post-process an image rendered in OpenGL using OpenCL.		or later Browse Files


OpenCL Simple Texture 3D Simple example that demonstrates use of 3D textures in OpenCL.		or later Browse Files


OpenCL Box Filter Linear 2-dimensional variable-width Box Filter of RGBA image. Implemented in OpenCL for CUDA GPU's, with performance comparison against simple C++ on host CPU. Each of the R, G, B and A channels are treated independently with results computed concurrently for each.		or later Browse Files


OpenCL Sobel Filter 2-dimensional 3x3 Sobel Magnitude Filter of RGBA image. Implemented in OpenCL for CUDA GPU's, with performance comparison against simple C++ on host CPU. Gradient magnitude for each of the R, G & B channels is computed concurrently and independently, then combined into a single gradient intensity with linear weighting factors.		or later Browse Files


OpenCL Median Filter Multi-GPU enabled, 2-dimensional 3x3 Median Filter of RGBA image. Implemented in OpenCL for CUDA GPU's, with performance comparison against simple C++ on host CPU. Each of the R, G & B channels are treated independently with results computed concurrently for each.		or later Browse Files


OpenCL Separable Convolution This sample implements convolution filter of a 2D image with arbitrary separable kernel.		or later Browse Files


OpenCL Recursive Gaussian Filter 2-dimensional Gaussian Blur Filter of RGBA image using IRF method. Implemented in OpenCL for CUDA GPU's, with performance comparison against simple C++ on host CPU. Each of the R, G, B and A channels are treated independently with results computed concurrently for each.		or later Browse Files


OpenCL Volume rendering This sample demonstrates basic volume rendering using 3D textures.		or later Browse Files


OpenCL Particle Collision Simulation Simulation of elastic collisions of a large # of bodies. Implemented in OpenCL for CUDA GPU's.		or later Browse Files


OpenCL N-Body Physics Simulation Gravitational Simulation of a large # of bodies. Implemented in OpenCL for CUDA GPU's.		or later Browse Files