Your setup is very normal. You have 1024MB of GPU memory and the biggest
chunk that can be allocated in *one* step is 256MB - NVIDIA typically
has a quarter of the total memory here.

This should run without problems.

Ulrich

Am 11.12.2012 12:58, schrieb thouks:
>> sorry, but darktable won't support that. A sane OpenCL setup for
>> darktable to run reliably requires 1GB+ of graphics memory. That's the
>> default setting which darktable tests on startup. Even going as low as
>> 512MB is calling for problems.
>>
>> Please understand that we as developers need to take care that OpenCL
>> related noise doesn't get too heavy. The enormous diversity of OpenCL
>> setups is already a big burden for us to help people. If we would now be
>> faced with additional issues - even related to setups where we knew
>> upfront they'd fail - we would drown. So these built-in limits are also
>> a kind of self-defense :)
> 
> 
> But not all of the memory is available for DT.
> Is this a limitation of my special device or is this as is supposed to be?
> 
> Thanks for all your work.
> 
> thorsten
> 
> 
> 
> 
> [opencl_init] trying to load opencl library: '<system default>'
> [opencl_init] opencl library 'libOpenCL' found on your system and loaded
> [opencl_init] found 1 platform
> [opencl_init] found 1 device
> [opencl_init] device 0 `GeForce GT 520' has sm_20 support.
> [opencl_init] device 0 `GeForce GT 520' supports image sizes of 32768 x  
> 32768
> [opencl_init] device 0 `GeForce GT 520' allows GPU memory allocations of  
> up to 255MB
> [opencl_init] device 0: GeForce GT 520
>       GLOBAL_MEM_SIZE:          1023MB
>       MAX_WORK_GROUP_SIZE:      1024
>       MAX_WORK_ITEM_DIMENSIONS: 3
>       MAX_WORK_ITEM_SIZES:      [ 1024 1024 64 ]
> 
> 

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