JOCL中的CL_INVALID_KERNEL_ARGS (OpenCL绑定)。
JOCL中的CL_INVALID_KERNEL_ARGS (OpenCL绑定)。
提问于 2015-08-05 15:57:09
有人在JOCL中做矩阵乘法时遇到这样的错误吗？
Exception in thread "main" org.jocl.CLException: CL_INVALID_KERNEL_ARGS
at org.jocl.CL.checkResult(CL.java:787)
at org.jocl.CL.clEnqueueNDRangeKernel(CL.java:20802)
at org.jocl.samples.JOCLSample.main(JOCLSample.java:147)我编辑了他们的示例HelloJOCL.java来做矩阵乘法计算，同时也做了matrixMul.cl (内核代码)。下面是导致错误的内核参数：
// Create the kernel
cl_kernel kernel = clCreateKernel(program, "matrixMul", null);
long time = nanoTime();
// Set the arguments for the kernel
clSetKernelArg(kernel, 0,
Sizeof.cl_mem, Pointer.to(memObjects[0]));
clSetKernelArg(kernel, 1,
Sizeof.cl_mem, Pointer.to(memObjects[1]));
clSetKernelArg(kernel, 2,
Sizeof.cl_mem, Pointer.to(memObjects[2]));工作项维度代码：
// Set the work-item dimensions
long global_work_size[] = new long[]{n};
long local_work_size[] = new long[]{1};
// Execute the kernel
clEnqueueNDRangeKernel(commandQueue, kernel, 1, null,
global_work_size, null, 0, null, null);和核心代码：
private static String programSource =
"__kernel void "+
"matrixMul(__global float* C,"+
" __global float* A,"+
" __global float* B,"+
" int wA, int wB)"+
"{"+
"int x = get_global_id(0);"+
"int y = get_global_id(1);"+
"float value = 0;"+
"for (int k = 0; k < wA; ++k)"+
"{"+
" float elementA = A[y * wA + k];"+
" float elementB = B[k * wB + x];"+
" value += elementA * elementB;"+
"}"+
"C[y * wA + x] = value;"+
"}";回答 2
Stack Overflow用户
回答已采纳
发布于 2015-08-07 15:28:04
核函数被定义为
__kernel void matrixMul(__global float* C,
__global float* A,
__global float* B,
int wA, int wB)因此需要五个论点。您只提供前三个参数，即表示float*值的内存对象。为了启动这个内核，您必须传递所有参数的值。在您的例子中，这可能大致如下所示：
int a=0;
clSetKernelArg(kernel, a++,
Sizeof.cl_mem, Pointer.to(memObjects[0]));
clSetKernelArg(kernel, a++,
Sizeof.cl_mem, Pointer.to(memObjects[1]));
clSetKernelArg(kernel, a++,
Sizeof.cl_mem, Pointer.to(memObjects[2]));
// These have been missing:
clSetKernelArg(kernel, a++,
Sizeof.cl_int, Pointer.to(new int[]{ wA }));
clSetKernelArg(kernel, a++,
Sizeof.cl_int, Pointer.to(new int[]{ wB }));Stack Overflow用户
发布于 2015-08-05 20:37:18
内核代码显示了5个输入参数，C、A、B、wA wB。但我只看到这里列出了3个clSetKernelSrg调用。
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原文链接：
https://stackoverflow.com/questions/31837360
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