Multi GPU help! REU student needs assistance

[seagreen5]

I am an REU student at Northeastern University for the summer. We have successfully implemented a scientific computation application on a GPU but now we are trying to implement the same program using two GPU’s rather than one. I don’t know where to start and I was hoping someone could provide some assistance.

[PINS]

I am an REU student at Northeastern University for the summer. We have successfully implemented a scientific computation application on a GPU but now we are trying to implement the same program using two GPU’s rather than one.  I don’t know where to start and I was hoping someone could provide some assistance.

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The SDK has an example called Multi-GPU, it should get you started. Basically, you need to use two CPU threads and assign each one to a different CUDA context, so each thread uses each GPU.

[seagreen5]

The SDK has an example called Multi-GPU, it should get you started. Basically, you need to use two CPU threads and assign each one to a different CUDA context, so each thread uses each GPU.

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Is that done in the kernel??

[nima_hol]

Is that done in the kernel??

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Kernel 's execution environment is GPU and therefore it is unable to handle CPU-side multithreading. you should create such threads in Host-side.

[seagreen5]

Kernel 's execution environment is GPU and therefore it is unable to handle CPU-side multithreading. you should create such threads in Host-side.

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thanks

[e.ping]

thanks

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Hope you got it working. Contact me, I may be able to help, I’ve gotten through some multi-gpu issues recently.