On 11/25/2012 12:52 PM, Ulrich Pegelow wrote:
Hi!
> Am 25.11.2012 11:49, schrieb Alexander Wagner:
>> [opencl_init] trying to load opencl library: '<system default>'
>> [opencl_init] opencl library 'libOpenCL' found on your system and loaded
>> [opencl_init] found 2 platforms
>> [opencl_init] found 2 devices
>> [opencl_init] device 0 `NVS 3100M' doesn't have sm_20 support.
>> [opencl_init] discarding device 0 `NVS 3100M' due to insufficient global
>> memory (511MB).
>> [opencl_init] discarding CPU device 1 `Intel(R) Core(TM) i7 CPU M 620 @
>> 2.67GHz' as it will not deliver any performance gain.
>> [opencl_init] no suitable devices found.
>> [opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
>> [opencl_init] initial status of opencl enabled flag is OFF.
>>
>> If I understand this correctly together with Johannes mail
>> I'll be out of luck due to lacking sm_20 support (whatever
>> that means ;) plus the fact that this card has "only" 512MB
>> of RAM on board.
>>
> The lack of sm_20 support is not an issue, there is some (slower)
> fall-back code for that.
Ok. Sounds promising.
> In your case darktable rejects the device due to insufficient memory.
>
> We have an undocumented option in darktablerc that sets opencl memory
> requirements.
Ah.
> Default is 768. You can try to set this to 500 and see if
> all works fine.
It seems to enable openCL with this setting, indeed:
[opencl_init] trying to load opencl library: '<system default>'
[opencl_init] opencl library 'libOpenCL' found on your system and loaded
[opencl_init] found 2 platforms
[opencl_init] found 2 devices
[opencl_init] device 0 `NVS 3100M' doesn't have sm_20 support.
[opencl_init] device 0 `NVS 3100M' supports image sizes of 4096 x 16383
[opencl_init] device 0 `NVS 3100M' allows GPU memory allocations of up
to 128MB
[opencl_init] device 0: NVS 3100M
GLOBAL_MEM_SIZE: 512MB
MAX_WORK_GROUP_SIZE: 512
MAX_WORK_ITEM_DIMENSIONS: 3
MAX_WORK_ITEM_SIZES: [ 512 512 64 ]
Initial call compiled a bunch of files which seems to be ok. I'll see if
any problems arise.
Thanks for the pointer! :)
--
Kind regards, / War is Peace.
| Freedom is Slavery.
Alexander Wagner | Ignorance is Strength.
|
| Theory : G. Orwell, "1984"
/ In practice: USA, since 2001
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