0
當使用clSetKernelArg(memory_object)設置內核參數並使用clEnqueueNDKernelRangeKernel()多次調用內核時,您以前在內核的clSetKernelArg()中將參數設置爲的memory_object是從主機傳輸到GPU,每次調用內核?opencl中的多個內核調用
status = clSetKernelArg(kernel, 0, sizeof(cl_mem), &inbuf);
size_t num_total_wi = M * N;
size_t num_wg = num_elem/N + ((num_elem/N == 0) ? 0 : 1);
size_t num_iter = num_elem/(num_total_wi) + (((num_elem % (num_total_wi)) == 0) ? 0 : 1);
for(i = 0; i < num_iter; i++) {
size_t global_work_size[3] = {num_total_wi, 1, 1};
size_t local_ws[3] = {N, 1, 1};
size_t global_offset[3] = {i * num_total_wi, 0, 0};
clEnqueueNDRangeKernel(queue, kernel, 1, global_offset, global_work_size, local_ws, 0, NULL, NULL);
}