Introduction to 
             OpenCL 
              Ezio	
  Bartocci	
  
        Vienna	
  University	
  of	
  Technology	
  
                                                          Overview 
                 •       Overview of OpenCL for NVIDIA GPUs 
                 •       API and Languages 
                 •       Sample codes walkthrough  
                 •       OpenCL Information and Resources 
               OpenCL – Open Computing Language 
                 •       OpenCL is an Open, royalty-free C-language extension 
                 •       It is a framework designed for parallel programming of 
                         heterogeneous systems using GPUs, CPUs, FPGA, DSP’s 
                         and other processors including embedded mobile devices 
                 •       It was initially introduced by Apple, now is supported by 
                         NVIDIA, Intel, AMD, IBM….(that are in the OpenCL working 
                         group) 
                  
                 •       Managed by Khronos Group 
                   OpenCL versions and history (1) 
         OpenCL 1.0 (2008) 
         •        OpenCL 1.0 has been released with Mac OS X Snow Leopard 
                  
         OpenCL 1.1 (2010) 
         •        The Khronos Group adds significant functionality for enhanced parallel 
                  programming flexibility, functionality, and performance including: 
                 •         New data types including 3-component vectors and additional image formats; 
                 •         Handling commands from multiple host threads and processing buffers across 
                          multiple devices;  
                 •         Operations on regions of a buffer including read, write and copy of 1D, 2D, or 3D 
                          rectangular regions; 
                 •           
                 •         Enhanced use of events to drive and control command execution; 
                   
                 •         Additional OpenCL built-in C functions such as integer clamp, shuffle, and 
                          asynchronous strided copies; 
                 •         Improved OpenGL interoperability through efficient sharing of images and buffers 
                          by linking OpenCL and OpenGL events.