About a year ago I found that darktable would no longer activate OpenCL. I had figured that this was due to an AMD GPU driver update. I’ve spent the last few days trying to get to the bottom of this with no luck, and have gone through the manual as well as the related PIXLS topics, so I’m hoping someone could provide some insight.
The system is an HP All-in-One with AMD A8-7410 APU with AMD Radeon R5 integrated graphics with 8GB of installed RAM. I verified that the GPU has OpenCL 2.0 and that all of the drivers are up to date. While this system is modest, it does do its job but I would like to get some more performance out of it if possible.
When opening preferences, the options to activate OpenCL support and for OpenCL scheduling profile are greyed out.
My OpenCL settings in dartablerc are as follows:
opencl=true
opencl_async_pixelpipe=false
opencl_avoid_atomics=false
opencl_device_priority=/!0,///!0,*
opencl_disable_drivers_blacklist=true
opencl_library=
opencl_mandatory_timeout=200
opencl_memory_headroom=400
opencl_memory_requirement=768
opencl_micro_nap=1000
opencl_number_event_handles=25
opencl_scheduling_profile=default
opencl_size_roundup=16
opencl_synch_cache=active module
opencl_use_cpu_devices=false
opencl_use_pinned_memory=false
And I received these results from darktable-cltest:
0.287098 [opencl_init] opencl related configuration options:
0.307598 [opencl_init]
0.311045 [opencl_init] opencl: 1
0.318421 [opencl_init] opencl_scheduling_profile: ‘default’
0.330967 [opencl_init] opencl_library: ‘’
0.342469 [opencl_init] opencl_memory_requirement: 768
0.355059 [opencl_init] opencl_memory_headroom: 400
0.365387 [opencl_init] opencl_device_priority: ‘/!0,///!0,*’
0.377052 [opencl_init] opencl_mandatory_timeout: 200
0.388949 [opencl_init] opencl_size_roundup: 16
0.396828 [opencl_init] opencl_async_pixelpipe: 0
0.403341 [opencl_init] opencl_synch_cache: active module
0.409827 [opencl_init] opencl_number_event_handles: 25
0.415708 [opencl_init] opencl_micro_nap: 1000
0.421182 [opencl_init] opencl_use_pinned_memory: 0
0.427486 [opencl_init] opencl_use_cpu_devices: 0
0.431942 [opencl_init] opencl_avoid_atomics: 0
0.436758 [opencl_init]
0.445049 [opencl_init] found opencl runtime library ‘OpenCL.dll’
0.451694 [opencl_init] opencl library ‘OpenCL.dll’ found on your system and loaded
0.861869 [opencl_init] found 1 platform
0.874442 [opencl_init] found 1 device
0.879924 [opencl_init] device 0Mullins' supports image sizes of 16384 x 16384 0.905973 [opencl_init] device 0Mullins’ allows GPU memory allocations of up to 2093MB
[opencl_init] device 0: Mullins
CANONICAL_NAME: mullins
GLOBAL_MEM_SIZE: 3487MB
MAX_WORK_GROUP_SIZE: 256
MAX_WORK_ITEM_DIMENSIONS: 3
MAX_WORK_ITEM_SIZES: [ 1024 1024 1024 ]
DRIVER_VERSION: 3240.6
DEVICE_VERSION: OpenCL 2.0 AMD-APP (3240.6)
1.787956 [opencl_init] could not create command queue for device 0: -6
1.794029 [opencl_init] no suitable devices found.
1.799066 [opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
1.807767 [opencl_init] initial status of opencl enabled flag is OFF.
So I’m really in a quandry because I don’t know what caused OpenCL to stop functioning in darktable or what I can do about it. Thanks in advance for your help!
