OpenCL Device Information

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 
 4 #ifdef __APPLE__
 5 #include <OpenCL/opencl.h>
 6 #else
 7 #include <CL/cl.h>
 8 #endif
 9 
10 
11 
12 #define MEM_SIZE (128)
13 #define MAX_SOURCE_SIZE (0x100000)
14 
15 int main()
16 {
17     cl_platform_id platform_id = NULL;
18     cl_device_id device_id = NULL;
19     cl_uint ret_num_devices;
20     cl_uint ret_num_platforms;
21     cl_int ret;
22     cl_uint work_item_dim;
23     size_t work_item_sizes[3];
24     size_t work_group_size;
25     cl_uint ucomput_uint = 0;
26     cl_uint uconstant_args = 0;
27     cl_ulong uconstant_buffer_size = 0;
28 
29     /* ??·§??, μe1ùàì?o á€o??? ?òà? */
30     ret = clGetPlatformIDs(1, &platform_id, &ret_num_platforms);
31     ret = clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_DEFAULT, 1, &device_id, &ret_num_devices);
32 
33     clGetDeviceInfo(device_id, CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS, sizeof(cl_uint), (void *)&work_item_dim, NULL);
34     clGetDeviceInfo(device_id, CL_DEVICE_MAX_WORK_ITEM_SIZES, sizeof(work_item_sizes),(void *)work_item_sizes, NULL);
35     clGetDeviceInfo(device_id, CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(size_t), (void *)&work_group_size, NULL);
36     clGetDeviceInfo(device_id, CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(cl_uint), (void *)&ucomput_uint, NULL);
37     clGetDeviceInfo(device_id, CL_DEVICE_MAX_CONSTANT_ARGS, sizeof(cl_uint), (void *)&uconstant_args, NULL);
38     clGetDeviceInfo(device_id, CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE, sizeof(cl_ulong), (void *)&uconstant_buffer_size, NULL);
39 
40     printf("Max work-item dimensions   : %d\n", work_item_dim);
41     printf("Max work-item sizes        : %d %d %d\n", work_item_sizes[0],work_item_sizes[1], work_item_sizes[2]) ;
42     printf("Max work-group sizes       : %d\n", work_group_size);
43     printf("Max comput_uint            : %u\n", ucomput_uint);
44     printf("Max constant_args          : %u\n", uconstant_args);
45     printf("Max constant_buffer_size   : %u\n", uconstant_buffer_size);
46 
47 
48     return 0;
49 }

 1 #Makefile
 2 TARGETS:=$(notdir $(PWD))
 3 CFLAGS=-Wall -W -O2
 4 
 5 PATH_TO_NVIDIA_INC=/usr/local/cuda/include/ 6                    -I/usr/local/cuda/include/CL
 7 PATH_TO_NVIDIA_LIB=/usr/local/cuda/lib64/
 8 
 9 OBJECTS=$(patsubst %.cpp,%.o, $(wildcard *.cpp))
10 
11 .SUFFIXES:.o .cpp
12 .cpp.o:
13     g++ $(CFLAGS) -I$(PATH_TO_NVIDIA_INC) -c -g -o $@ $<
14 
15 all:$(TARGETS)
16 
17 $(TARGETS):$(OBJECTS)
18     g++ $(CFLAGS) -I$(PATH_TO_NVIDIA_INC) -L$(PATH_TO_NVIDIA_LIB) -g -o $@ $^ -lOpenCL
19 
20 run:
21     ./$(TARGETS)
22 clean:
23     rm -f *.o $(TARGETS)