Hi,
I am trying to use darktable with OpenCL with my NVidia GTX750, using
Debian testing, kernel 3.16 and the NVidia driver 340.32.
According to clinfo, two OpenCL platforms are there. According to
darktable, libOpenCL is not found. In fact, libOpenCL.so.1 is there, as well as
the necessary nvidia opencl library.
Any ideas? What are the requirements for darktable to recognize an OpenCL
platform? May darktable be confused because the CPU is also offered as an
OpenCL platform?
Thanks for your input...
Michael
#####
$ darktable -d opencl
[opencl_init] opencl related configuration options:
[opencl_init]
[opencl_init] opencl: 1
[opencl_init] opencl_library: ''
[opencl_init] opencl_memory_requirement: 768
[opencl_init] opencl_memory_headroom: 300
[opencl_init] opencl_device_priority: '*/!0,*/*/*'
[opencl_init] opencl_size_roundup: 16
[opencl_init] opencl_async_pixelpipe: 0
[opencl_init] opencl_synch_cache: 0
[opencl_init] opencl_number_event_handles: 25
[opencl_init] opencl_micro_nap: 1000
[opencl_init] opencl_use_pinned_memory: 0
[opencl_init] opencl_use_cpu_devices: 0
[opencl_init] opencl_avoid_atomics: 0
[opencl_init] opencl_omit_whitebalance: 0
[opencl_init]
[opencl_init] trying to load opencl library: '<system default>'
[opencl_init] could not find opencl runtime library 'libOpenCL'
[opencl_init] no working opencl library found. Continue with opencl
disabled
[opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
[opencl_init] initial status of opencl enabled flag is OFF.
#####
$ clinfo
Number of platforms: 2
Platform Profile: FULL_PROFILE
Platform Version: OpenCL 1.2 AMD-APP
(937.2) Platform Name: AMD
Accelerated Parallel Processing Platform
Vendor: Advanced Micro Devices, Inc.
Platform Extensions: cl_khr_icd
cl_amd_event_callback cl_amd_offline_devices Platform
Profile: FULL_PROFILE Platform
Version: OpenCL 1.1 CUDA 6.5.14 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 Name: AMD Accelerated
Parallel Processing Number of devices: 1
Device Type: CL_DEVICE_TYPE_CPU
Device ID: 4098
Max compute units: 4
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
Native vector width char: 16
Native vector width short: 8
Native vector width int: 4
Native vector width long: 2
Native vector width float: 4
Native vector width double: 0
Max clock frequency: 2600Mhz
Address bits: 64
Max memory allocation: 2147483648
Image support: Yes
Max number of images read arguments: 128
Max number of images write arguments: 8
Max image 2D width: 8192
Max image 2D height: 8192
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: 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: Yes
Cache type: Read/Write
Cache line size: 64
Cache size: 65536
Global memory size: 6257696768
Constant buffer size: 65536
Max number of constant args: 8
Local memory type: Global
Local memory size: 32768
Error correction support: 0
Unified memory for Host and Device: 1
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: 0x7f6d2d2930c0
Name: AMD Phenom(tm) II X4
810 Processor Vendor:
AuthenticAMD Device OpenCL C version: OpenCL C
1.2 Driver version: 2.0 (sse2)
Profile: FULL_PROFILE
Version: OpenCL 1.2 AMD-APP
(937.2) 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_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_popcnt
Platform Name: NVIDIA CUDA
Number of devices: 1
Device Type: CL_DEVICE_TYPE_GPU
Device ID: 4318
Max compute units: 5
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
Native vector width char: 1
Native vector width short: 1
Native vector width int: 1
Native vector width long: 1
Native vector width float: 1
Native vector width double: 1
Max clock frequency: 1084Mhz
Address bits: 32
Max memory allocation: 536690688
Image support: Yes
Max number of images read arguments: 256
Max number of images write arguments: 16
Max image 2D width: 32768
Max image 2D height: 32768
Max image 3D width: 4096
Max image 3D height: 4096
Max image 3D depth: 4096
Max samplers within kernel: 32
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: 81920
Global memory size: 2146762752
Constant buffer size: 65536
Max number of constant args: 9
Local memory type: Local
Local memory size: 49151
Error correction support: 0
Unified memory for Host and Device: 0
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: 0xe31050
Name: GeForce GTX 750 Ti
Vendor: NVIDIA Corporation
Device OpenCL C version: OpenCL C 1.1
Driver version: 340.32
Profile: FULL_PROFILE
Version: OpenCL 1.1 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
#####
$ locate libOpenCL
/usr/lib/x86_64-linux-gnu/libOpenCL.so.1
/usr/lib/x86_64-linux-gnu/libOpenCL.so.1.0.0
#####
$ ls -l /usr/lib/x86_64-linux-gnu/libOpenCL.so*
lrwxrwxrwx 1 root root 18 Sep 1 16:57
/usr/lib/x86_64-linux-gnu/libOpenCL.so.1 -> libOpenCL.so.1.0.0
-rw-r--r-- 1 root root 39304 Sep 1 16:57
/usr/lib/x86_64-linux-gnu/libOpenCL.so.1.0.0
#####
$ ls -l /etc/OpenCL/vendors/
insgesamt 8
-rw-r--r-- 1 root root 15 Nov 8 2011 amdocl64.icd
-rw-r--r-- 1 root root 22 Aug 6 04:58 nvidia.icd
#####
$ cat /etc/OpenCL/vendors/nvidia.icd
libnvidia-opencl.so.1
#####
$ locate libnvidia-opencl.so
/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.1
/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.340.32
#####
$ ls -l /usr/lib/x86_64-linux-gnu/libnvidia-opencl.so*
lrwxrwxrwx 1 root root 26 Aug 18 11:31
/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.1 -> libnvidia-opencl.so.340.32
-rw-r--r-- 1 root root 14085968 Aug 6 05:46
/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.340.32
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