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Find which GPU a GpuMat is on

user555 Published in May 26, 2018, 11:40 pm

With multiple GPUs on my system, I would like to find an easy way to determine which GPU a cv::cuda::GpuMat is allocated on. For example, ignoring errors:

int numDevices = cv::cuda::getCudaEnabledDeviceCount();
// Choose a random GPU
cv::cuda::GpuMat foo(5, 5, CV_8UC1);
// Choose another random GPU

Now, which GPU does foo live on? I'm using OpenCV 3 and CUDA 8, in case there is a version-specific solution.

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