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bubu
Adept II

cl.hpp improvements

Could be possible to add two things to the cl.hpp, pls?

 

1) Detect the OpenCL.dll. Delay Load DLL is not enough. We need a method to detect if the OpenCL.dll is present on the system because, if not, any cl:evice or cl:latform will cause an ugly "Sorry, this program cannot find the module OpenCL.dll".

For windows, detect the Windows\system32\OpenCL.dll presency...

For linux/macos/solaris, I don't know

 

2) We need a way to see if the GPU is actually the primary display... so we can skip that card due to the 5 seconds watchdog or whatever. Just add a new CL_GPU_IS_PRIMARY_DISPLAY to the cl:evice.

 

thx

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nou
Exemplar

1.this will solve ICD from khronos. nvidia it support. i hope next beta from AMD it will support too.

2. that is request for khronos add this to specification. for now make choose device manualy.

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Originally posted by: nou 1.this will solve ICD from khronos. nvidia it support. i hope next beta from AMD it will support too.

Not really. In fact, I'm getting that error from the NVIDIA SDK

Some OSs have no native OpenCL support ( just Leopard has it atm ). The point is that even with an ICD the user could use a old driver, much older than the OpenCL specification... so any call to the OpenCL API will cause a missing module DLL message.

I simply cannot suppose there gonna exist an OpenCL.dll in the system folder.... The cl.hpp should include a function for this.

 

2. that is request for khronos add this to specification. for now make choose device manualy.

 

I hope ATI could tell Khronos about the CL_IS_PRIMARY_DEVI CE cap... because I cannot and the watchdog is really a pain.

 

Other thing they should add is a CL_OPTIMAL_WORKGROUP_SIZE so we can get a range of optimal working sizes... because I could asume a good group size is 256x256 threads now but perhaps it's 2048x2048 in two years... or 16x16... We need a way to know thins since each OpenCL device can be a completely different world!

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What is the problem with delayed-loading?

1) Your App will run, with or without any OpenCL.dll present

2) If loading fails, your App can do whatever it wants to (crashing, presenting a dialog, exiting graceful, doing something else...)

An ICD wont help you much if there is simply no OpenCL.dll

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1) Your App will run, with or without any OpenCL.dll present

Tell that to Visual Studio, which closes the program automatically if a DLL is not found.

 

 

2) If loading fails, your App can do whatever it wants to (crashing, presenting a dialog, exiting graceful, doing something else...)

Nope. It just closes after showing an horrible message dialog.

 

 

 

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