Why GPU doens't work without using nvprof?

Accelerated Computing CUDA CUDA Programming and Performance
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1

I made hello.cu,

Then I compiled it by this ::
nvcc -o hello hello.cu

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Why GPU only run when using option with nvprof??
I want to get “Hello CUDA from GPU” just by ./hello

nvcc -V :: 10.1.243

2

if you’re running on a laptop with a discrete gpu and an integrated gpu, it may be necessary to use a tool like optirun to get the laptop discrete GPU to work properly.

You could also try running with cuda-memcheck to see if any useful error information is reported.