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cnn.cpp
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cnn.cpp
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#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <unistd.h>
#include <assert.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <CL/opencl.h>
#include <time.h>
#include <sys/time.h>
#include "cnn.h"
int launch_kernel(
cl_command_queue &commands, // compute command queue
cl_kernel &kernel // compute kernel
)
{
/**
* Below is the template code for this lab.
* You should modify the global/local work size and the kernel.cl to optimize your design.
*/
// Step 1 Define the global/local work size
size_t local_size[2] = {1,1};
size_t global_size[2] = {1,1};
// Step 2 Enqueue the kernel
int err = clEnqueueNDRangeKernel(commands, kernel, 2, NULL,
(size_t*)&global_size, (size_t*)&local_size, 0, NULL, NULL);
if (err)
{
printf("Error: Failed to execute kernel! %d\n", err);
printf("Test failed\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int ocl_fpga(
float Cout[NUM][OUTIMROW][OUTIMROW],
float Cin[NUM][INIMROW][INIMROW],
float weight[NUM][NUM][KERNEL][KERNEL],
float bias[NUM],
char** argv
)
{
#if defined(SDX_PLATFORM) && !defined(TARGET_DEVICE)
#define STR_VALUE(arg) #arg
#define GET_STRING(name) STR_VALUE(name)
#define TARGET_DEVICE GET_STRING(SDX_PLATFORM)
#endif
//TARGET_DEVICE macro needs to be passed from gcc command line
const char *target_device_name = TARGET_DEVICE;
int err; // error code returned from api calls
cl_platform_id platforms[16]; // platform id
cl_platform_id platform_id; // platform id
cl_uint platform_count;
cl_device_id device_id; // compute device id
cl_context context; // compute context
cl_command_queue commands; // compute command queue
cl_program program; // compute program
cl_kernel kernel; // compute kernel
char cl_platform_vendor[1001];
cl_mem input_cin; // device memory used for the input array
cl_mem input_bias; // device memory used for the input array
cl_mem input_weight; // device memory used for the input array
cl_mem output_cout; // device memory used for the output array
//
// Get all platforms and then select Xilinx platform
err = clGetPlatformIDs(16, platforms, &platform_count);
if (err != CL_SUCCESS)
{
printf("Error: Failed to find an OpenCL platform!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
printf("INFO: Found %d platforms\n", platform_count);
// Find Xilinx Plaftorm
int platform_found = 0;
for (unsigned int iplat=0; iplat<platform_count; iplat++) {
err = clGetPlatformInfo(platforms[iplat], CL_PLATFORM_VENDOR, 1000, (void *)cl_platform_vendor,NULL);
if (err != CL_SUCCESS) {
printf("Error: clGetPlatformInfo(CL_PLATFORM_VENDOR) failed!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
if (strcmp(cl_platform_vendor, "Xilinx") == 0) {
printf("INFO: Selected platform %d from %s\n", iplat, cl_platform_vendor);
platform_id = platforms[iplat];
platform_found = 1;
}
}
if (!platform_found) {
printf("ERROR: Platform Xilinx not found. Exit.\n");
return EXIT_FAILURE;
}
// Connect to a compute device
// find all devices and then select the target device
cl_device_id devices[16]; // compute device id
cl_uint device_count;
unsigned int device_found = 0;
char cl_device_name[1001];
err = clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_ACCELERATOR,
16, devices, &device_count);
if (err != CL_SUCCESS) {
printf("Error: Failed to create a device group!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
//iterate all devices to select the target device.
for (int i=0; i<(int)device_count; i++) {
err = clGetDeviceInfo(devices[i], CL_DEVICE_NAME, 1024, cl_device_name, 0);
if (err != CL_SUCCESS) {
printf("Error: Failed to get device name for device %d!\n", i);
printf("Test failed\n");
return EXIT_FAILURE;
}
printf("INFO: Found device %s\n", cl_device_name);
if(strcmp(cl_device_name, target_device_name) == 0) {
device_id = devices[i];
device_found = 1;
printf("INFO: Selected %s as the target device\n", cl_device_name);
}
}
if (!device_found) {
printf("ERROR: Target device %s not found. Exit.\n", target_device_name);
return EXIT_FAILURE;
}
err = clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_ACCELERATOR,
1, &device_id, NULL);
if (err != CL_SUCCESS)
{
printf("Error: Failed to create a device group!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Create a compute context
//
context = clCreateContext(0, 1, &device_id, NULL, NULL, &err);
if (!context)
{
printf("Error: Failed to create a compute context!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Create a command commands
//
commands = clCreateCommandQueue(context, device_id, 0, &err);
if (!commands)
{
printf("Error: Failed to create a command commands!\n");
printf("Error: code %i\n",err);
printf("Test failed\n");
return EXIT_FAILURE;
}
int status;
// Load binary from disk
unsigned char *kernelbinary;
char *xclbin=argv[1];
printf("INFO: Loading %s\n", xclbin);
int n_i = load_file_to_memory(xclbin, (char **) &kernelbinary);
if (n_i < 0) {
printf("failed to load kernel from xclbin: %s\n", xclbin);
printf("Test failed\n");
return EXIT_FAILURE;
}
size_t n = n_i;
// Create the compute program from offline
program = clCreateProgramWithBinary(context, 1, &device_id, &n,
(const unsigned char **) &kernelbinary, &status, &err);
if ((!program) || (err!=CL_SUCCESS)) {
printf("Error: Failed to create compute program from binary %d!\n", err);
printf("Test failed\n");
return EXIT_FAILURE;
}
// Build the program executable
//
err = clBuildProgram(program, 0, NULL, NULL, NULL, NULL);
if (err != CL_SUCCESS)
{
size_t len;
char buffer[2048];
printf("Error: Failed to build program executable!\n");
clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, sizeof(buffer), buffer, &len);
printf("%s\n", buffer);
printf("Test failed\n");
return EXIT_FAILURE;
}
// Create the compute kernel in the program we wish to run
//
kernel = clCreateKernel(program, "cnn_kernel", &err);
if (!kernel || err != CL_SUCCESS)
{
printf("Error: Failed to create compute kernel!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Create the input and output arrays in device memory for our calculation
//
input_cin = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(float) * NUM * INIMROW * INIMROW, NULL, NULL);
input_weight = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(float) * NUM * NUM * KERNEL * KERNEL, NULL, NULL);
input_bias = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(float) * NUM, NULL, NULL);
output_cout = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(float) * NUM * OUTIMROW * OUTIMROW, NULL, NULL);
if (!input_cin || !input_weight || !input_bias || !output_cout)
{
printf("Error: Failed to allocate device memory!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Write our data set into the input array in device memory
//
err = clEnqueueWriteBuffer(commands, input_cin, CL_TRUE, 0, sizeof(float) * NUM * INIMROW * INIMROW, Cin, 0, NULL, NULL);
if (err != CL_SUCCESS)
{
printf("Error: Failed to write to source array Cin!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Write our data set into the input array in device memory
//
err = clEnqueueWriteBuffer(commands, input_weight, CL_TRUE, 0, sizeof(float) * NUM * NUM * KERNEL * KERNEL, weight, 0, NULL, NULL);
if (err != CL_SUCCESS)
{
printf("Error: Failed to write to source array weight!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Write our data set into the input array in device memory
//
err = clEnqueueWriteBuffer(commands, input_bias, CL_TRUE, 0, sizeof(float) * NUM, bias, 0, NULL, NULL);
if (err != CL_SUCCESS)
{
printf("Error: Failed to write to source array bias!\n");
printf("Test failed\n");
return EXIT_FAILURE;
}
// Set the arguments to our compute kernel
//
err = 0;
err = clSetKernelArg(kernel, 0, sizeof(cl_mem), &input_cin);
err |= clSetKernelArg(kernel, 1, sizeof(cl_mem), &input_weight);
err |= clSetKernelArg(kernel, 2, sizeof(cl_mem), &input_bias);
err |= clSetKernelArg(kernel, 3, sizeof(cl_mem), &output_cout);
if (err != CL_SUCCESS)
{
printf("Error: Failed to set kernel arguments! %d\n", err);
printf("Test failed\n");
return EXIT_FAILURE;
}
err = launch_kernel(commands, kernel);
// Read back the results from the device to verify the output
if (err == EXIT_FAILURE)
{
printf("Error: Failed to launch kernel! %d\n", err);
printf("Test failed\n");
return EXIT_FAILURE;
}
cl_event readevent;
err = clEnqueueReadBuffer( commands, output_cout, CL_TRUE, 0, sizeof(int) * NUM * OUTIMROW * OUTIMROW, Cout, 0, NULL, &readevent );
if (err != CL_SUCCESS)
{
printf("Error: Failed to read output array! %d\n", err);
printf("Test failed\n");
return EXIT_FAILURE;
}
clWaitForEvents(1, &readevent);
// Shutdown and cleanup
//
clReleaseMemObject(input_cin);
clReleaseMemObject(input_weight);
clReleaseMemObject(input_bias);
clReleaseMemObject(output_cout);
clReleaseKernel(kernel);
clReleaseProgram(program);
clReleaseCommandQueue(commands);
clReleaseContext(context);
return EXIT_SUCCESS;
}
int main(int argc, char** argv)
{
static float Cout[NUM][OUTIMROW][OUTIMROW];
static float Cin[NUM][INIMROW][INIMROW];
static float weight[NUM][NUM][KERNEL][KERNEL];
static float bias[NUM];
if (argc != 2){
printf("%s <inputfile>\n", argv[0]);
return EXIT_FAILURE;
}
LoadData(Cin, weight, bias);
// OpenCL host program
fprintf(stderr, "Start cnn computation\n");
struct timeval t1, t2;
gettimeofday(&t1, NULL);
int err = ocl_fpga(Cout, Cin, weight, bias, argv);
if (err == EXIT_FAILURE){
return err;
}
gettimeofday(&t2, NULL);
float elapsed_time = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) / 1e6;
fprintf(stderr, "time(s): %f\n", elapsed_time);
fprintf(stderr, "GOPs: %f\n", (float)NUM * NUM * IMROW * IMROW * KERNEL * KERNEL * 2 / elapsed_time / 1e9);
int error = Verify(Cout);
if(error != 0) {
fprintf(stderr, "error ocurrs %d\n", error);
return EXIT_FAILURE;
}
else {
fprintf(stderr, "all right!\n");
return EXIT_SUCCESS;
}
}