Error in executing paralleldemo_gpu_benchmark : An unexpected error occurred during CUDA execution. The CUDA error was: unspecified launch failure

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Bob Khosh 2017-12-24

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https://ww2.mathworks.cn/matlabcentral/answers/374401-error-in-executing-paralleldemo_gpu_benchmark-an-unexpected-error-occurred-during-cuda-execution

评论： Joss Knight 2017-12-26

Hi, I'm Using a GeForce GTX 1050 GPU. when I run paralleldemo_gpu_benchmark in MATLAB R2017b,everything is OK till the "Achieved peak read+write speed on the host" part but when it reaches the CUDA part, I get the following error :

      An unexpected error occurred during CUDA execution. The CUDA error was:
      unspecified launch failure
      Error in parallel.internal.gpu.timeit
      Error in gputimeit (line 66)
      t = parallel.internal.gpu.timeit(f,  num_outputs);
      Error in paralleldemo_gpu_benchmark (line 169)
          mmTimesGPU(ii) = gputimeit(@() A*B);

Whats wrong? Thanks in advance.

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Matt J 2017-12-24

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https://ww2.mathworks.cn/matlabcentral/answers/374401-error-in-executing-paralleldemo_gpu_benchmark-an-unexpected-error-occurred-during-cuda-execution#answer_297574

Possibly a time-out issue? See here for more info.

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Bob Khosh 2017-12-25

OK then ... guess I'll do the same ... Thanks again!

Joss Knight 2017-12-26

The downside of disabling the time-out is that your CUDA kernels can lock up your graphics and make your entire system unresponsive. Most CUDA programmers are fine with this, but each to their own really. You can instead just set the time-out to something very long like 30 seconds (TdrDelay).

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