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ocl.c
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ocl.c
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#include <CL/cl.h>
#include <stdio.h>
#include "ocl.h"
static const gchar* opencl_error_msgs[] = {
"CL_SUCCESS",
"CL_DEVICE_NOT_FOUND",
"CL_DEVICE_NOT_AVAILABLE",
"CL_COMPILER_NOT_AVAILABLE",
"CL_MEM_OBJECT_ALLOCATION_FAILURE",
"CL_OUT_OF_RESOURCES",
"CL_OUT_OF_HOST_MEMORY",
"CL_PROFILING_INFO_NOT_AVAILABLE",
"CL_MEM_COPY_OVERLAP",
"CL_IMAGE_FORMAT_MISMATCH",
"CL_IMAGE_FORMAT_NOT_SUPPORTED",
"CL_BUILD_PROGRAM_FAILURE",
"CL_MAP_FAILURE",
"CL_MISALIGNED_SUB_BUFFER_OFFSET",
"CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST",
/* next IDs start at 30! */
"CL_INVALID_VALUE",
"CL_INVALID_DEVICE_TYPE",
"CL_INVALID_PLATFORM",
"CL_INVALID_DEVICE",
"CL_INVALID_CONTEXT",
"CL_INVALID_QUEUE_PROPERTIES",
"CL_INVALID_COMMAND_QUEUE",
"CL_INVALID_HOST_PTR",
"CL_INVALID_MEM_OBJECT",
"CL_INVALID_IMAGE_FORMAT_DESCRIPTOR",
"CL_INVALID_IMAGE_SIZE",
"CL_INVALID_SAMPLER",
"CL_INVALID_BINARY",
"CL_INVALID_BUILD_OPTIONS",
"CL_INVALID_PROGRAM",
"CL_INVALID_PROGRAM_EXECUTABLE",
"CL_INVALID_KERNEL_NAME",
"CL_INVALID_KERNEL_DEFINITION",
"CL_INVALID_KERNEL",
"CL_INVALID_ARG_INDEX",
"CL_INVALID_ARG_VALUE",
"CL_INVALID_ARG_SIZE",
"CL_INVALID_KERNEL_ARGS",
"CL_INVALID_WORK_DIMENSION",
"CL_INVALID_WORK_GROUP_SIZE",
"CL_INVALID_WORK_ITEM_SIZE",
"CL_INVALID_GLOBAL_OFFSET",
"CL_INVALID_EVENT_WAIT_LIST",
"CL_INVALID_EVENT",
"CL_INVALID_OPERATION",
"CL_INVALID_GL_OBJECT",
"CL_INVALID_BUFFER_SIZE",
"CL_INVALID_MIP_LEVEL",
"CL_INVALID_GLOBAL_WORK_SIZE"
};
const gchar* opencl_map_error(int error)
{
if (error >= -14)
return opencl_error_msgs[-error];
if (error <= -30)
return opencl_error_msgs[-error-15];
return NULL;
}
gchar *
ocl_read_program(const gchar *filename)
{
FILE *fp = fopen(filename, "r");
if (fp == NULL)
return NULL;
fseek(fp, 0, SEEK_END);
const size_t length = ftell(fp);
rewind(fp);
gchar *buffer = (gchar *) g_malloc0(length+1);
if (buffer == NULL) {
fclose(fp);
return NULL;
}
size_t buffer_length = fread(buffer, 1, length, fp);
fclose(fp);
if (buffer_length != length) {
g_free(buffer);
return NULL;
}
return buffer;
}
cl_program
ocl_get_program(opencl_desc *ocl, const gchar *filename, const gchar *options)
{
gchar *buffer = ocl_read_program(filename);
if (buffer == NULL)
return FALSE;
int errcode = CL_SUCCESS;
cl_program program = clCreateProgramWithSource(ocl->context, 1, (const char **) &buffer, NULL, &errcode);
if (errcode != CL_SUCCESS) {
g_free(buffer);
return NULL;
}
errcode = clBuildProgram(program, ocl->num_devices, ocl->devices, options, NULL, NULL);
if (errcode != CL_SUCCESS) {
const int LOG_SIZE = 4096;
gchar* log = (gchar *) g_malloc0(LOG_SIZE * sizeof(char));
CHECK_ERROR(clGetProgramBuildInfo(program, ocl->devices[0], CL_PROGRAM_BUILD_LOG, LOG_SIZE, (void*) log, NULL));
g_print("\n=== Build log for %s===%s\n\n", filename, log);
g_free(log);
g_free(buffer);
return NULL;
}
g_free(buffer);
return program;
}
static cl_platform_id
get_nvidia_platform(void)
{
cl_platform_id *platforms = NULL;
cl_uint num_platforms = 0;
cl_platform_id nvidia_platform = NULL;
cl_int errcode = clGetPlatformIDs(0, NULL, &num_platforms);
if (errcode != CL_SUCCESS)
return NULL;
platforms = (cl_platform_id *) g_malloc0(num_platforms * sizeof(cl_platform_id));
errcode = clGetPlatformIDs(num_platforms, platforms, NULL);
gchar result[256];
for (int i = 0; i < num_platforms; i++) {
clGetPlatformInfo(platforms[i], CL_PLATFORM_VENDOR, 256, result, NULL);
if (g_strstr_len(result, -1, "NVIDIA") != NULL) {
nvidia_platform = platforms[i];
break;
}
}
g_free(platforms);
return nvidia_platform;
}
opencl_desc *
ocl_new (gboolean enable_profiling)
{
opencl_desc *ocl = g_malloc0(sizeof(opencl_desc));
cl_platform_id platform = get_nvidia_platform();
if (platform == NULL)
return NULL;
int errcode = CL_SUCCESS;
CHECK_ERROR(clGetDeviceIDs(platform, CL_DEVICE_TYPE_ALL, 0, NULL, &ocl->num_devices));
ocl->devices = g_malloc0(ocl->num_devices * sizeof(cl_device_id));
CHECK_ERROR(clGetDeviceIDs(platform, CL_DEVICE_TYPE_ALL, ocl->num_devices, ocl->devices, NULL));
ocl->context = clCreateContext(NULL, ocl->num_devices, ocl->devices, NULL, NULL, &errcode);
CHECK_ERROR(errcode);
ocl->cmd_queues = g_malloc0(ocl->num_devices * sizeof(cl_command_queue));
cl_command_queue_properties queue_properties = enable_profiling ? CL_QUEUE_PROFILING_ENABLE : 0;
const size_t len = 256;
char string_buffer[len];
CHECK_ERROR(clGetPlatformInfo(platform, CL_PLATFORM_VERSION, len, string_buffer, NULL));
printf("# Platform: %s\n", string_buffer);
for (int i = 0; i < ocl->num_devices; i++) {
CHECK_ERROR(clGetDeviceInfo(ocl->devices[i], CL_DEVICE_NAME, len, string_buffer, NULL));
printf("# Device %i: %s\n", i, string_buffer);
ocl->cmd_queues[i] = clCreateCommandQueue(ocl->context, ocl->devices[i], queue_properties, &errcode);
CHECK_ERROR(errcode);
}
return ocl;
}
void
ocl_free(opencl_desc *ocl)
{
for (int i = 0; i < ocl->num_devices; i++)
clReleaseCommandQueue(ocl->cmd_queues[i]);
CHECK_ERROR(clReleaseContext(ocl->context));
g_free(ocl->devices);
g_free(ocl->cmd_queues);
g_free(ocl);
}
void
ocl_show_event_info(FILE *fp, const gchar *kernel, guint num_events, cl_event *events)
{
for (int i = 0; i < num_events; i++) {
cl_ulong param;
cl_event event;
cl_command_queue queue;
event = events[i];
clGetEventInfo (event, CL_EVENT_COMMAND_QUEUE, sizeof (cl_command_queue), &queue, NULL);
fprintf (fp, "%s %p", kernel, queue);
CHECK_ERROR(clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_QUEUED, sizeof(cl_ulong), ¶m, NULL));
fprintf (fp, " %ld", param);
CHECK_ERROR(clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_SUBMIT, sizeof(cl_ulong), ¶m, NULL));
fprintf (fp, " %ld", param);
CHECK_ERROR(clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_START, sizeof(cl_ulong), ¶m, NULL));
fprintf (fp, " %ld", param);
CHECK_ERROR(clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_END, sizeof(cl_ulong), ¶m, NULL));
fprintf (fp, " %ld\n", param);
}
}