That won't grow any hair on your chest. [Hope you are not a woman
]
I have to lookup what that means...
I've been able to get started with an OpenCL AMD environment, but haven't studied yet what the cl-demo is doing at all
as it asks for 2 numeric args, have given 64 and 32 without knowing yet what it might represent
But I see it thinks "MAX_CLOCK_FREQUENCY: 1400", but this is incorrect; it's just the current setting done by the cpu governor, max is 2500 MHz for each of the 4 cores.
$ make
gcc -std=gnu99 -ocl-demo cl-demo.c cl-helper.c -lrt -lOpenCL
gcc -std=gnu99 -oprint-devices print-devices.c cl-helper.c -lrt -lOpenCL
$ ./print-devices
platform 0: vendor 'Advanced Micro Devices, Inc.'
device 0: 'AMD A10-5750M APU with Radeon(tm) HD Graphics'
$ ./cl-demo 64 32
Choose platform:
[0] Advanced Micro Devices, Inc.
Enter choice: 0
Choose device:
[0] AMD A10-5750M APU with Radeon(tm) HD Graphics
Enter choice: 0
---------------------------------------------------------------------
NAME: AMD A10-5750M APU with Radeon(tm) HD Graphics
VENDOR: AuthenticAMD
PROFILE: FULL_PROFILE
VERSION: OpenCL 1.2 AMD-APP (1800.11)
EXTENSIONS: cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_spir cl_khr_gl_event
DRIVER_VERSION: 1800.11 (sse2,avx,fma4)
Type: CPU
EXECUTION_CAPABILITIES: Kernel Native
GLOBAL_MEM_CACHE_TYPE: Read-Write (2)
CL_DEVICE_LOCAL_MEM_TYPE: Global (2)
SINGLE_FP_CONFIG: 0xbf
QUEUE_PROPERTIES: 0x2
VENDOR_ID: 4098
MAX_COMPUTE_UNITS: 4
MAX_WORK_ITEM_DIMENSIONS: 3
MAX_WORK_GROUP_SIZE: 1024
PREFERRED_VECTOR_WIDTH_CHAR: 16
PREFERRED_VECTOR_WIDTH_SHORT: 8
PREFERRED_VECTOR_WIDTH_INT: 4
PREFERRED_VECTOR_WIDTH_LONG: 2
PREFERRED_VECTOR_WIDTH_FLOAT: 8
PREFERRED_VECTOR_WIDTH_DOUBLE: 4
MAX_CLOCK_FREQUENCY: 1400
ADDRESS_BITS: 64
MAX_MEM_ALLOC_SIZE: 2147483648
IMAGE_SUPPORT: 1
MAX_READ_IMAGE_ARGS: 128
MAX_WRITE_IMAGE_ARGS: 64
IMAGE2D_MAX_WIDTH: 8192
IMAGE2D_MAX_HEIGHT: 8192
IMAGE3D_MAX_WIDTH: 2048
IMAGE3D_MAX_HEIGHT: 2048
IMAGE3D_MAX_DEPTH: 2048
MAX_SAMPLERS: 16
MAX_PARAMETER_SIZE: 4096
MEM_BASE_ADDR_ALIGN: 1024
MIN_DATA_TYPE_ALIGN_SIZE: 128
GLOBAL_MEM_CACHELINE_SIZE: 64
GLOBAL_MEM_CACHE_SIZE: 16384
GLOBAL_MEM_SIZE: 7475437568
MAX_CONSTANT_BUFFER_SIZE: 65536
MAX_CONSTANT_ARGS: 8
LOCAL_MEM_SIZE: 32768
ERROR_CORRECTION_SUPPORT: 0
PROFILING_TIMER_RESOLUTION: 1
ENDIAN_LITTLE: 1
AVAILABLE: 1
COMPILER_AVAILABLE: 1
MAX_WORK_GROUP_SIZES: 1024 1024 1024
---------------------------------------------------------------------
*** Kernel compilation resulted in non-empty log message.
*** Set environment variable CL_HELPER_PRINT_COMPILER_OUTPUT=1 to see more.
*** NOTE: this may include compiler warnings and other important messages
*** about your code.
*** Set CL_HELPER_NO_COMPILER_OUTPUT_NAG=1 to disable this message.
0.000022 s
0.034223 GB/s
GOOD
Update:
When setting the above said EnvVar then the following output comes:
$ CL_HELPER_PRINT_COMPILER_OUTPUT=1 ./cl-demo 64 32
*** build of 'sum' on 'AMD A10-5750M APU with Radeon(tm) HD Graphics' said:
"/tmp/OCLN5DvmR.cl", line 1: warning: OpenCL extension is now part of core
#pragma OPENCL EXTENSION cl_khr_fp64: enable
^
*** (end of message)
0.000033 s
0.023338 GB/s
GOOD
Update-2:
It executes this OpenCL kernel code:
$ cat vec-add-soln.cl
Code:
#pragma OPENCL EXTENSION cl_khr_fp64: enable
__kernel void sum(
__global const float *a,
__global const float *b,
__global float *c,
long n)
{
int gid = get_global_id(0);
if (gid < n)
c[gid] = a[gid] + b[gid];
}
I'll study the source later what the cl-demo is calculating at all, it seems to be some vector calculation...
