我使用安装此软件包附带的示例中的HelloWorld示例
问题是我因为错误而无法运行任何示例。
cl_uint numPlatforms; //the NO. of platforms
cl_platform_id platform = NULL; //the chosen platform
cl_int status = clGetPlatformIDs(0, NULL, &numPlatforms);
以下代码块会产生错误。在此声明的末尾，状态设置为-858993460。抛出异常说
"Unhandled exception at 0x7429C9F5 in AtomicCounters.exe: 0xC0000005: Access violation executing location 0x00000000."
我正在使用visual studio 2012，Windows 7 64-BIT和AMD GPU
我找不到足够的资源来解决错误。请帮帮我。
/**********************************************************************
Copyright ©2013 Advanced Micro Devices, Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************/
// For clarity,error checking has been omitted.
#include <CL/cl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string>
#include <fstream>
#define SUCCESS 0
#define FAILURE 1
using namespace std;
/* convert the kernel file into a string */
int convertToString(const char *filename, std::string& s)
{
size_t size;
char* str;
std::fstream f(filename, (std::fstream::in | std::fstream::binary));
if(f.is_open())
{
size_t fileSize;
f.seekg(0, std::fstream::end);
size = fileSize = (size_t)f.tellg();
f.seekg(0, std::fstream::beg);
str = new char[size+1];
if(!str)
{
f.close();
return 0;
}
f.read(str, fileSize);
f.close();
str[size] = '\0';
s = str;
delete[] str;
return 0;
}
cout<<"Error: failed to open file\n:"<<filename<<endl;
return FAILURE;
}
int main(int argc, char* argv[])
{
/*Step1: Getting platforms and choose an available one.*/
cl_uint numPlatforms; //the NO. of platforms
cl_platform_id platform = NULL; //the chosen platform
cl_int status = clGetPlatformIDs(0, NULL, &numPlatforms);
if (status != CL_SUCCESS)
{
cout << "Error: Getting platforms!" << endl;
return FAILURE;
}
/*For clarity, choose the first available platform. */
if(numPlatforms > 0)
{
cl_platform_id* platforms = (cl_platform_id* )malloc(numPlatforms* sizeof(cl_platform_id));
status = clGetPlatformIDs(numPlatforms, platforms, NULL);
platform = platforms[0];
free(platforms);
}
/*Step 2:Query the platform and choose the first GPU device if has one.Otherwise use the CPU as device.*/
cl_uint numDevices = 0;
cl_device_id *devices;
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
if (numDevices == 0) //no GPU available.
{
cout << "No GPU device available." << endl;
cout << "Choose CPU as default device." << endl;
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 0, NULL, &numDevices);
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, numDevices, devices, NULL);
}
else
{
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, numDevices, devices, NULL);
}
/*Step 3: Create context.*/
cl_context context = clCreateContext(NULL,1, devices,NULL,NULL,NULL);
/*Step 4: Creating command queue associate with the context.*/
cl_command_queue commandQueue = clCreateCommandQueue(context, devices[0], 0, NULL);
/*Step 5: Create program object */
const char *filename = "HelloWorld_Kernel.cl";
string sourceStr;
status = convertToString(filename, sourceStr);
const char *source = sourceStr.c_str();
size_t sourceSize[] = {strlen(source)};
cl_program program = clCreateProgramWithSource(context, 1, &source, sourceSize, NULL);
/*Step 6: Build program. */
status=clBuildProgram(program, 1,devices,NULL,NULL,NULL);
/*Step 7: Initial input,output for the host and create memory objects for the kernel*/
const char* input = "GdkknVnqkc";
size_t strlength = strlen(input);
cout << "input string:" << endl;
cout << input << endl;
char *output = (char*) malloc(strlength + 1);
cl_mem inputBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY|CL_MEM_COPY_HOST_PTR, (strlength + 1) * sizeof(char),(void *) input, NULL);
cl_mem outputBuffer = clCreateBuffer(context, CL_MEM_WRITE_ONLY , (strlength + 1) * sizeof(char), NULL, NULL);
/*Step 8: Create kernel object */
cl_kernel kernel = clCreateKernel(program,"helloworld", NULL);
/*Step 9: Sets Kernel arguments.*/
status = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&inputBuffer);
status = clSetKernelArg(kernel, 1, sizeof(cl_mem), (void *)&outputBuffer);
/*Step 10: Running the kernel.*/
size_t global_work_size[1] = {strlength};
status = clEnqueueNDRangeKernel(commandQueue, kernel, 1, NULL, global_work_size, NULL, 0, NULL, NULL);
/*Step 11: Read the cout put back to host memory.*/
status = clEnqueueReadBuffer(commandQueue, outputBuffer, CL_TRUE, 0, strlength * sizeof(char), output, 0, NULL, NULL);
output[strlength] = '\0'; //Add the terminal character to the end of output.
cout << "\noutput string:" << endl;
cout << output << endl;
/*Step 12: Clean the resources.*/
status = clReleaseKernel(kernel); //Release kernel.
status = clReleaseProgram(program); //Release the program object.
status = clReleaseMemObject(inputBuffer); //Release mem object.
status = clReleaseMemObject(outputBuffer);
status = clReleaseCommandQueue(commandQueue); //Release Command queue.
status = clReleaseContext(context); //Release context.
if (output != NULL)
{
free(output);
output = NULL;
}
if (devices != NULL)
{
free(devices);
devices = NULL;
}
std::cout<<"Passed!\n";
return SUCCESS;
}
答案 0 :(得分：1)
我在W7 32bit，nVIDIA和VS2010下遇到了同样的问题。 （具有相同返回码的相同函数中的相同精确错误）
我不知道造成这种情况的原因，但以管理员身份运行应用并启用了Windows XP兼容性修复了问题。
我认为是对操作系统/驱动程序的某种权限。或者也许与VS2010相关的东西，以及它们与DLL的关系
答案 1 :(得分：1)
http://www.khronos.org/registry/cl/sdk/1.0/docs/man/xhtml/clGetPlatformIDs.html
cl_int clGetPlatformIDs (cl_uint num_entries,
cl_platform_id *platforms, cl_uint *num_platforms)
clGetPlatformIDs (0, NULL, &numPlatforms);
如果num_entries等于零且平台不为NULL，或者如果num_platforms和platforms都为NULL，则函数“返回CL_INVALID_VALUE”，但如果num_platforms不是，则不检查平台是否为NULL，因此它会尝试读取0x00000000，并给出此错误。它应该与clGetPlatformIDs (1, &platform, &numPlatforms);一起使用。
答案 2 :(得分：1)
相同的错误，在Windows Vista 64位，VS2008下。
还从命令提示符运行clinfo，它崩溃了。
我已经解决了更新视频驱动程序的问题。 我希望它可以帮助：）