chundoong-lab-ta/SHPC2023/hw4/matmul/matmul.c

126 lines
4.0 KiB
C

#define _GNU_SOURCE
#include "matmul.h"
#include "util.h"
#include <CL/cl.h>
#include <stdio.h>
#include <stdlib.h>
#define CHECK_ERROR(err) \
if (err != CL_SUCCESS) { \
printf("[%s:%d] OpenCL error %d\n", __FILE__, __LINE__, err); \
exit(EXIT_FAILURE); \
}
static cl_int err;
static cl_platform_id platform;
static cl_device_id device;
static cl_context context;
static cl_command_queue queue;
static cl_program program;
static cl_kernel kernel;
static cl_mem a_d, b_d, c_d;
void matmul(const float *A, const float *B, float *C, int M, int N, int K) {
// TODO: FILL_IN_HERE
}
static void print_platform_info(cl_platform_id platform) {
size_t sz;
char *buf;
CHECK_ERROR(clGetPlatformInfo(platform, CL_PLATFORM_NAME, 0, NULL, &sz));
buf = (char *)malloc(sz);
CHECK_ERROR(clGetPlatformInfo(platform, CL_PLATFORM_NAME, sz, buf, NULL));
printf("Detected OpenCL platform: %s\n", buf);
free(buf);
}
static void print_device_info(cl_device_id device) {
size_t sz;
char *buf;
CHECK_ERROR(clGetDeviceInfo(device, CL_DEVICE_NAME, 0, NULL, &sz));
buf = (char *)malloc(sz);
CHECK_ERROR(clGetDeviceInfo(device, CL_DEVICE_NAME, sz, buf, NULL));
printf("Detected OpenCL device: %s\n", buf);
free(buf);
}
static cl_program create_and_build_program_with_source(cl_context context,
cl_device_id device,
const char *file_name) {
FILE *file = fopen(file_name, "rb");
if (file == NULL) {
printf("Failed to open %s\n", file_name);
exit(EXIT_FAILURE);
}
fseek(file, 0, SEEK_END);
size_t source_size = ftell(file);
rewind(file);
char *source_code = (char *)malloc(source_size + 1);
size_t ntotal = 0;
while (ntotal < source_size) {
int nread = fread(source_code, sizeof(char), source_size, file);
ntotal += nread;
}
source_code[source_size] = '\0';
fclose(file);
cl_program program = clCreateProgramWithSource(
context, 1, (const char **)&source_code, &source_size, &err);
CHECK_ERROR(err);
free(source_code);
err = clBuildProgram(program, 1, &device, "", NULL, NULL);
if (err == CL_BUILD_PROGRAM_FAILURE) {
size_t log_size;
CHECK_ERROR(clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, 0,
NULL, &log_size));
char *log = (char *)malloc(log_size + 1);
CHECK_ERROR(clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG,
log_size, log, NULL));
log[log_size] = 0;
printf("Compile error:\n%s\n", log);
free(log);
}
CHECK_ERROR(err);
return program;
}
void matmul_initialize(int M, int N, int K) {
// Get OpenCL platform
err = clGetPlatformIDs(1, &platform, NULL);
CHECK_ERROR(err);
print_platform_info(platform);
// Get OpenCL device (only 1)
err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL);
CHECK_ERROR(err);
print_device_info(device);
// Create OpenCL context
context = clCreateContext(NULL, 1, &device, NULL, NULL, &err);
CHECK_ERROR(err);
// Create OpenCL command queue
queue = clCreateCommandQueue(context, device, 0, &err);
CHECK_ERROR(err);
// Compile program from "kernel.cl"
program = create_and_build_program_with_source(context, device, "kernel.cl");
// Extract kernel from compiled program
kernel = clCreateKernel(program, "sgemm", &err);
CHECK_ERROR(err);
// Create GPU buffers
a_d = clCreateBuffer(context, CL_MEM_READ_WRITE, M * K * sizeof(float), NULL,
&err);
CHECK_ERROR(err);
b_d = clCreateBuffer(context, CL_MEM_READ_WRITE, K * N * sizeof(float), NULL,
&err);
CHECK_ERROR(err);
c_d = clCreateBuffer(context, CL_MEM_READ_WRITE, M * N * sizeof(float), NULL,
&err);
CHECK_ERROR(err);
}
void matmul_finalize() {}