222 lines
7.7 KiB
C++
222 lines
7.7 KiB
C++
/*
|
|
* Simple OpenCL demo program
|
|
*
|
|
* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* gcc -o cldemo -std=gnu99 -Wall -I/usr/include/nvidia-current cldemo.c
|
|
* -lOpenCL
|
|
*
|
|
*/
|
|
|
|
#include <CL/cl.h>
|
|
#include <fstream>
|
|
#include <iostream>
|
|
#include <sstream>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
//#define NUM_DATA 65536
|
|
#define NUM_DATA 1024
|
|
|
|
#define CL_CHECK(_expr) \
|
|
do { \
|
|
cl_int _err = _expr; \
|
|
if (_err == CL_SUCCESS) \
|
|
break; \
|
|
fprintf(stderr, "OpenCL Error: '%s' returned %d!\n", #_expr, (int)_err); \
|
|
abort(); \
|
|
} while (0)
|
|
|
|
#define CL_CHECK_ERR(_expr) \
|
|
({ \
|
|
cl_int _err = CL_INVALID_VALUE; \
|
|
decltype(_expr) _ret = _expr; \
|
|
if (_err != CL_SUCCESS) { \
|
|
fprintf(stderr, "OpenCL Error: '%s' returned %d!\n", #_expr, (int)_err); \
|
|
abort(); \
|
|
} \
|
|
_ret; \
|
|
})
|
|
|
|
void pfn_notify(const char *errinfo, const void *private_info, size_t cb,
|
|
void *user_data) {
|
|
fprintf(stderr, "OpenCL Error (via pfn_notify): %s\n", errinfo);
|
|
}
|
|
|
|
static int read_kernel_file(const char* filename, uint8_t** data, size_t* size) {
|
|
if (nullptr == filename || nullptr == data || 0 == size)
|
|
return -1;
|
|
|
|
FILE* fp = fopen(filename, "r");
|
|
if (NULL == fp) {
|
|
fprintf(stderr, "Failed to load kernel.");
|
|
return -1;
|
|
}
|
|
fseek(fp , 0 , SEEK_END);
|
|
long fsize = ftell(fp);
|
|
rewind(fp);
|
|
|
|
*data = (uint8_t*)malloc(fsize);
|
|
*size = fread(*data, 1, fsize, fp);
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint8_t *kernel_bin = NULL;
|
|
|
|
///
|
|
// Cleanup any created OpenCL resources
|
|
//
|
|
void Cleanup(cl_context context, cl_command_queue commandQueue,
|
|
cl_program program, cl_kernel kernel, cl_mem memObjects[3]) {
|
|
for (int i = 0; i < 3; i++) {
|
|
if (memObjects[i] != 0)
|
|
clReleaseMemObject(memObjects[i]);
|
|
}
|
|
if (commandQueue != 0)
|
|
clReleaseCommandQueue(commandQueue);
|
|
|
|
if (kernel != 0)
|
|
clReleaseKernel(kernel);
|
|
|
|
if (program != 0)
|
|
clReleaseProgram(program);
|
|
|
|
if (context != 0)
|
|
clReleaseContext(context);
|
|
|
|
if (kernel_bin) free(kernel_bin);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
printf("enter demo main\n");
|
|
|
|
cl_platform_id platform_id;
|
|
cl_device_id device_id;
|
|
size_t kernel_size;
|
|
cl_int binary_status = 0;
|
|
int i;
|
|
|
|
// read kernel binary from file
|
|
if (0 != read_kernel_file("kernel.pocl", &kernel_bin, &kernel_size))
|
|
return -1;
|
|
|
|
// Getting platform and device information
|
|
CL_CHECK(clGetPlatformIDs(1, &platform_id, NULL));
|
|
CL_CHECK(clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_DEFAULT, 1, &device_id, NULL));
|
|
|
|
cl_context context;
|
|
context = CL_CHECK_ERR(clCreateContext(NULL, 1, &device_id, &pfn_notify, NULL, &_err));
|
|
|
|
cl_command_queue queue;
|
|
queue = CL_CHECK_ERR(clCreateCommandQueue(context, device_id, CL_QUEUE_PROFILING_ENABLE, &_err));
|
|
|
|
cl_kernel kernel = 0;
|
|
cl_mem memObjects[2] = {0, 0};
|
|
|
|
// Create OpenCL program - first attempt to load cached binary.
|
|
// If that is not available, then create the program from source
|
|
// and store the binary for future use.
|
|
std::cout << "Attempting to create program from binary..." << std::endl;
|
|
cl_program program = CL_CHECK_ERR(clCreateProgramWithBinary(
|
|
context, 1, &device_id, &kernel_size, &kernel_bin, &binary_status, &_err));
|
|
if (program == NULL) {
|
|
std::cerr << "Failed to write program binary" << std::endl;
|
|
Cleanup(context, queue, program, kernel, memObjects);
|
|
return 1;
|
|
} else {
|
|
std::cout << "Read program from binary." << std::endl;
|
|
}
|
|
|
|
// Build program
|
|
CL_CHECK(clBuildProgram(program, 1, &device_id, NULL, NULL, NULL));
|
|
|
|
printf("attempting to create input buffer\n");
|
|
fflush(stdout);
|
|
cl_mem input_buffer;
|
|
input_buffer = CL_CHECK_ERR(clCreateBuffer(
|
|
context, CL_MEM_READ_ONLY, sizeof(float) * NUM_DATA, NULL, &_err));
|
|
|
|
printf("attempting to create output buffer\n");
|
|
fflush(stdout);
|
|
cl_mem output_buffer;
|
|
output_buffer = CL_CHECK_ERR(clCreateBuffer(
|
|
context, CL_MEM_WRITE_ONLY, sizeof(float) * NUM_DATA, NULL, &_err));
|
|
|
|
memObjects[0] = input_buffer;
|
|
memObjects[1] = output_buffer;
|
|
|
|
float factor = ((float)rand() / (float)(RAND_MAX)) * 100.0;
|
|
|
|
printf("attempting to create kernel\n");
|
|
fflush(stdout);
|
|
kernel = CL_CHECK_ERR(clCreateKernel(program, "saxpy", &_err));
|
|
printf("setting up kernel args cl_mem:%lx \n", input_buffer);
|
|
fflush(stdout);
|
|
CL_CHECK(clSetKernelArg(kernel, 0, sizeof(input_buffer), &input_buffer));
|
|
CL_CHECK(clSetKernelArg(kernel, 1, sizeof(output_buffer), &output_buffer));
|
|
CL_CHECK(clSetKernelArg(kernel, 2, sizeof(factor), &factor));
|
|
|
|
printf("attempting to enqueue write buffer\n");
|
|
fflush(stdout);
|
|
for (int i = 0; i < NUM_DATA; i++) {
|
|
float in = ((float)rand() / (float)(RAND_MAX)) * 100.0;
|
|
CL_CHECK(clEnqueueWriteBuffer(queue, input_buffer, CL_TRUE,
|
|
i * sizeof(float), 4, &in, 0, NULL, NULL));
|
|
}
|
|
|
|
cl_event kernel_completion;
|
|
size_t global_work_size[] = {NUM_DATA/2,NUM_DATA/2};
|
|
printf("attempting to enqueue kernel\n");
|
|
fflush(stdout);
|
|
CL_CHECK(clEnqueueNDRangeKernel(queue, kernel, 1, NULL, global_work_size,
|
|
NULL, 0, NULL, &kernel_completion));
|
|
printf("Enqueue'd kerenel\n");
|
|
fflush(stdout);
|
|
cl_ulong time_start, time_end;
|
|
CL_CHECK(clWaitForEvents(1, &kernel_completion));
|
|
CL_CHECK(clGetEventProfilingInfo(kernel_completion,
|
|
CL_PROFILING_COMMAND_START,
|
|
sizeof(time_start), &time_start, NULL));
|
|
CL_CHECK(clGetEventProfilingInfo(kernel_completion, CL_PROFILING_COMMAND_END,
|
|
sizeof(time_end), &time_end, NULL));
|
|
double elapsed = time_end - time_start;
|
|
printf("time(ns):%lg\n", elapsed);
|
|
CL_CHECK(clReleaseEvent(kernel_completion));
|
|
|
|
printf("Result:");
|
|
for (int i = 0; i < NUM_DATA; i++) {
|
|
float data;
|
|
CL_CHECK(clEnqueueReadBuffer(queue, output_buffer, CL_TRUE,
|
|
i * sizeof(float), 4, &data, 0, NULL, NULL));
|
|
// printf(" %f", data);
|
|
}
|
|
printf("\n");
|
|
printf("Passed!\n");
|
|
CL_CHECK(clReleaseMemObject(memObjects[0]));
|
|
CL_CHECK(clReleaseMemObject(memObjects[1]));
|
|
|
|
CL_CHECK(clReleaseKernel(kernel));
|
|
CL_CHECK(clReleaseProgram(program));
|
|
CL_CHECK(clReleaseContext(context));
|
|
|
|
return 0;
|
|
}
|