Ocrana
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Cuda and Nvidia Optimus
Hello,
hope to find a developer here who have experience with Cuda development and special with the new Nvidia Optimus.
How I can detect programatic what graphic card is active inside an Optimus system? I tried it with different ways but I always get the message that the graphic card, Quadro 2000M, is active. But I start the software with Intel Graphic card option. So it seems, Nvidia drivers and framework is always loaded.
Ocrana
hope to find a developer here who have experience with Cuda development and special with the new Nvidia Optimus.
How I can detect programatic what graphic card is active inside an Optimus system? I tried it with different ways but I always get the message that the graphic card, Quadro 2000M, is active. But I start the software with Intel Graphic card option. So it seems, Nvidia drivers and framework is always loaded.
Ocrana
ASKER
Hi,
a Optimus sytem is a hybrid system so I need to have the info what grahic card is active to switch on/off CUDA in my app.
Ocrana
a Optimus sytem is a hybrid system so I need to have the info what grahic card is active to switch on/off CUDA in my app.
Ocrana
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ASKER
Hi Sure, I work in windows. But I think you do not understand hybrid systems. Both cards are present, both cards are loaded. It is just the question about the "Bus". You cannot ask "What card is active". You will get for both cards a "true" because you can switch "on the fly" or run one app with Nvidia and one with Intel.
Our app works perfect with Nvidia and Cuda, but I have to know what the user selected to run. I do not think, it is a good way to activate the full GPU system/power if the user started the app with "Intel" option.
Optimus is a system to save power.
So I need to know from Nvidia, Cuda or whatever, what card was used while starting the software.
Our app works perfect with Nvidia and Cuda, but I have to know what the user selected to run. I do not think, it is a good way to activate the full GPU system/power if the user started the app with "Intel" option.
Optimus is a system to save power.
So I need to know from Nvidia, Cuda or whatever, what card was used while starting the software.
I think you're confusing contexts here. CUDA is designed to do parallel computation on nVidia GPU's. So obviously it doesn't run on Intel graphic chips. When you ask CUDA what its using, it will always mention the nVidia hardware. It makes no difference what display adapter is active. A system could have the GPU's inside and not attached to a display adapter. They are effectively general purpose processors which are mostly used for graphics.
Something like DirectX would tell you what display adapters were present and active. OpenCL would be the way to program Intel's GPU chips, but Intel do not support it at the moment.