Hi,
I'm trying to use ATI stream SDK on Intel CPU within a machine having an Nvidia Geforce 480 GPU.
I've checked the icd configuration it seems to be ok.
When running the samples and using the libOpenCL.so from ATI on the Nvidia GPU everything works fine. However, when trying to use the CPU as a device I've got either a Segmentation Fault or a CL_DEVICE_NOT_FOUND.
With some printfs, I concluded that the runtime is using the wrong platform for the CPU, i.e It's trying to use NVidia platform with a CPU device.
Did anyone success in running OpenCL on CPU with such a configuration
My configuration
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Software
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ATI Stream SDK 2.2 x86_64
Nvidia devdriver linux_64_260.24.
ubuntu 10.04 x86_64
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Hardware
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Intel Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz
Nvidia GeForce 480
Many thanks
Tarik
you must use second AMD platform. what is output of CLInfo from AMD SDK?
here is the output of AMD SDK CLInfo
Number of platforms: 2
Platform Profile: FULL_PROFILE
Platform Version: OpenCL 1.0 CUDA 3.2.1
Platform Name: NVIDIA CUDA
Platform Vendor: NVIDIA Corporation
Platform Extensions: cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll
Platform Profile: FULL_PROFILE
Platform Version: OpenCL 1.1 ATI-Stream-v2.2 (302)
Platform Name: ATI Stream
Platform Vendor: Advanced Micro Devices, Inc.
Platform Extensions: cl_khr_icd cl_amd_event_callback
Platform Name: NVIDIA CUDA
Number of devices: 2
Device Type: CL_DEVICE_TYPE_GPU
Device ID: 4318
Max compute units: 15
Max work items dimensions: 3
Max work items[0]: 1024
Max work items[1]: 1024
Max work items[2]: 64
Max work group size: 1024
Preferred vector width char: 1
Preferred vector width short: 1
Preferred vector width int: 1
Preferred vector width long: 1
Preferred vector width float: 1
Preferred vector width double: 1
Max clock frequency: 1451Mhz
Address bits: 32
Max memory allocation: 402440192
Image support: Yes
Max number of images read arguments: 128
Max number of images write arguments: 8
Max image 2D width: 4096
Max image 2D height: 32768
Max image 3D width: 2048
Max image 3D height: 2048
Max image 3D depth: 2048
Max samplers within kernel: 16
Max size of kernel argument: 4352
Alignment (bits) of base address: 4096
Minimum alignment (bytes) for any datatype: 128
Single precision floating point capability
Denorms: Yes
Quiet NaNs: Yes
Round to nearest even: Yes
Round to zero: Yes
Round to +ve and infinity: Yes
IEEE754-2008 fused multiply-add: Yes
Cache type: Read/Write
Cache line size: 128
Cache size: 245760
Global memory size: 1609760768
Constant buffer size: 65536
Max number of constant args: 9
Local memory type: Scratchpad
Local memory size: 49152
Profiling timer resolution: 1000
Device endianess: Little
Available: Yes
Compiler available: Yes
Execution capabilities:
Execute OpenCL kernels: Yes
Execute native function: No
Queue properties:
Out-of-Order: Yes
Profiling : Yes
Platform ID: 0x1c33770
Name: GeForce GTX 480
Vendor: NVIDIA Corporation
Driver version: 260.24
Profile: FULL_PROFILE
Version: OpenCL 1.0 CUDA
Extensions: cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll 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_fp64
Device Type: CL_DEVICE_TYPE_GPU
Device ID: 4318
Max compute units: 15
Max work items dimensions: 3
Max work items[0]: 1024
Max work items[1]: 1024
Max work items[2]: 64
Max work group size: 1024
Preferred vector width char: 1
Preferred vector width short: 1
Preferred vector width int: 1
Preferred vector width long: 1
Preferred vector width float: 1
Preferred vector width double: 1
Max clock frequency: 1451Mhz
Address bits: 32
Max memory allocation: 402571264
Image support: Yes
Max number of images read arguments: 128
Max number of images write arguments: 8
Max image 2D width: 4096
Max image 2D height: 32768
Max image 3D width: 2048
Max image 3D height: 2048
Max image 3D depth: 2048
Max samplers within kernel: 16
Max size of kernel argument: 4352
Alignment (bits) of base address: 4096
Minimum alignment (bytes) for any datatype: 128
Single precision floating point capability
Denorms: Yes
Quiet NaNs: Yes
Round to nearest even: Yes
Round to zero: Yes
Round to +ve and infinity: Yes
IEEE754-2008 fused multiply-add: Yes
Cache type: Read/Write
Cache line size: 128
Cache size: 245760
Global memory size: 1610285056
Constant buffer size: 65536
Max number of constant args: 9
Local memory type: Scratchpad
Local memory size: 49152
Profiling timer resolution: 1000
Device endianess: Little
Available: Yes
Compiler available: Yes
Execution capabilities:
Execute OpenCL kernels: Yes
Execute native function: No
Queue properties:
Out-of-Order: Yes
Profiling : Yes
Platform ID: 0x1c33770
Name: GeForce GTX 480
Vendor: NVIDIA Corporation
Driver version: 260.24
Profile: FULL_PROFILE
Version: OpenCL 1.0 CUDA
Extensions: cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll 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_fp64
Error : atomics mismatch!
Error : Bytes mismatch!
Error : glSharing mismatch!
Error : images mismatch!
Error : printf mismatch!
Error : deviceAttributeQuery mismatch!
Failed!
Platform Name: ATI Stream
Number of devices: 1
Device Type: CL_DEVICE_TYPE_CPU
Device ID: 4098
Max compute units: 12
Max work items dimensions: 3
Max work items[0]: 1024
Max work items[1]: 1024
Max work items[2]: 1024
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: 4
Preferred vector width double: 0
Max clock frequency: 1600Mhz
Address bits: 64
Max memory allocation: 1073741824
Image support: No
Max size of kernel argument: 4096
Alignment (bits) of base address: 1024
Minimum alignment (bytes) for any datatype: 128
Single precision floating point capability
Denorms: Yes
Quiet NaNs: Yes
Round to nearest even: Yes
Round to zero: Yes
Round to +ve and infinity: Yes
IEEE754-2008 fused multiply-add: No
Cache type: Read/Write
Cache line size: 0
Cache size: 0
Global memory size: 3221225472
Constant buffer size: 65536
Max number of constant args: 8
Local memory type: Global
Local memory size: 32768
Profiling timer resolution: 1
Device endianess: Little
Available: Yes
Compiler available: Yes
Execution capabilities:
Execute OpenCL kernels: Yes
Execute native function: Yes
Queue properties:
Out-of-Order: No
Profiling : Yes
Platform ID: 0x7f72d006db20
Name: Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz
Vendor: GenuineIntel
Driver version: 2.0
Profile: FULL_PROFILE
Version: OpenCL 1.1 ATI-Stream-v2.2 (302)
Extensions: 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_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_printf
Error : atomics mismatch!
Error : Bytes mismatch!
Error : glSharing mismatch!
Error : images mismatch!
Error : printf mismatch!
Error : deviceAttributeQuery mismatch!
Failed!
Thanks
try create context from second platform.
Hi,
already done, not working.
I've got a strange behaviour. I tried to debug with gdb the seg fault and the program ran fine with the cpu, any explanation on this???
Cheers.
Originally posted by: hsi544 Hi,
already done, not working.
I've got a strange behaviour. I tried to debug with gdb the seg fault and the program ran fine with the cpu, any explanation on this???
Cheers.
It should work. I am able to run any sample on both Nvidia GPU or CPU after selecting appropriate platform. Send us your code.
i installed nvidia driver version 260 and the problem disappeared for me. seems that after all it was an nvidia driver issue.
Hi,
Thanks for your help it also worked for me, I had the 260.24 driver and I replaced it by the 260.19.21, the everything worked fine.
Cheers