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three buffers in the host memory Float * buf1 = 0; Float * buf2 = 0; Float * buf = 0; Buf1 = (float *) malloc (BUFSIZE * sizeof (float )); Buf2 = (float *) malloc (BUFSIZE * sizeof (float )); Buf = (float *) malloc (BUFSIZE * sizeof (float )); // Initialize buf1 and buf2 with some random values Int I; Srand (unsigned) time (NULL )); For (I = 0; I Buf1 [I] = rand () %65535; Srand (unsigned) time (NULL) + 1000 ); For (I = 0; I Buf2 [I] = rand () %65535; // Compute the sum of buf1, buf2, and cpu

work group size, which may be 256. // Run the kernel command. The range value is 1 dimension, and the work itmes size is bufsize. Cl_event EV; Size_t global_work_size = bufsize; Clenqueuendrangekernel (queue, Kernel, 1, Null, Global_work_size, Null, 0, null, eV ); Status = clflush (Queue ); Waitforeventandrelease ( eV ); // Copy data back to host memory Cl_float * PTR; Cl_event mapevt; PTR = (cl_float *

transferred from: http://www.cnblogs.com/mikewolf2002/archive/2012/09/05/2671261.html Author: Mike Old Wolf Now, we begin to write a simple OpenCL program that calculates the sum of two arrays and puts them in another array. The program calculates the CPU and GPU separately, and finally verifies that they are equal. The process of the OPENCL program is roughly as follows: The following are the main codes

the AMD's OpenCL SDK is installed directly, like Workstation-1, has installed AMD OpenCL for the video card The SDK can therefore use the CPU directly, and like workstation-2 if you intend to run the program on a multi-core CPU, you also need to install an AMD OpenCL SDK fo

Welcome to repost, please note Http://blog.csdn.net/leonwei/article/details/8893796 1 Hello opencl Compile a simple example program to demonstrate the basic usage of opencl: 1. You can download an opencl SDK from the developer we

1. opencl Architecture Opencl can implement parallel computing on hybrid devices, including CPU, GPU, and Other Processors, such as cell processors and DSPs. With opencl programming, you can achieve portable parallel acceleration code. [However, due to the different hardware performance of each

The amd opencl university course is a very good entry-level opencl tutorial. by reading the PPT In the tutorial, we can quickly learn about the opencl mechanism and programming methods. : Http://developer.amd.com/zones/OpenCLZone/universities/Pages/default.aspx The English in the tutorial is very simple. I believe that anyone who learns

uses device visible memory as global memory. The following describes how to transmit data between system memory and device memory: When the data in system memory is to be copied to device memory, opencl runtime performs the following operations: 1. When the transmitted data is less than 32 KB, the CPU copies the data to the pinned memory buffer that can be accessed by the runtime, And the DMA engine ex

CPUVoid cpu_histgo (){Int I, J;For (I = 0; I {For (j = 0; j {// Printf ("data: % d \ n", data [I * width + J]);Hostbin [DATA [I * width + J] ++;// Printf ("hostbin % d = % d \ n", data [I * width + J], hostbin [DATA [I * width + J]);}}} How to Use opencl to calculate grayscale images is not that easy. We know that the advantage of GPU is parallel computing. How to partition images to calculate histograms in parallel is the focus of our discussion. Th

Now we use the method in the previous tutorial to count the number of pixels in a pair of rgba images (This pixel satisfies the arbitrary components of R, G, B, And a> = 5 )? The method I want to consider is to create a histogram of 256 bin. For a pixel, calculate max (R, G, B, A) and use this value to determine the pixel to enter the bin, after obtaining the histogram, the width * Height-hostbin [0]-hostbin [1]-hostbin [

1. The first method is simple to download using struts. Downloadaction must be inherited. Then rewrite the getstreaminfo method. You just need to exile inputstream into the internal class. Package CN. finefuture. common. faxserver. struts; 2. Write the output stream by yourself. /**

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paramht = new hasptable ();/** Arraylist */Private arraylist updfilearr = new arraylist ();/*** Set the request object.** @ Param request* Httpservletrequest request object*/Public void setrequest (httpservletrequest request ){This. Request = request;}/*** Set the File Upload path.** @ Param path* File Upload path specified by the user.*/Public void setuploadpath (string path ){This. uploadpath = path;}/*** File Upload Handler Program . ���� B** @ Return int operation result 0 file operation su

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Java Web file download 1-File Download implementation and garbled Processing File upload and download are common problems in web development. In the past few days, I have used file downloads for a project. I have also separated some notes and made some preparations today. File Upload is pending for further testing. Her

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