cuda error checking 学习笔记

由于发现cuda c++ 的 debug方式和c++ 差别很大,因此打算再开一篇,专门记录一些和error checking 以及debug有关的内容.

Error checks in CUDA code can help catch CUDA errors at their source. There are 2 sources of errors in CUDA source code:

  1. Errors from CUDA API calls. For example, a call to  cudaMalloc() might fail.
  2. Errors from CUDA kernel calls. For example, there might be invalid memory access inside a kernel.

All CUDA API calls return a  cudaError value, so these calls are easy to check:

CUDA kernel invocations do not return any value. Error from a CUDA kernel call can be checked after its execution by calling  cudaGetLastError():

 

以及下面是一个check error的宏…

 

作者: CrazyKK

ex-ACMer@hust,researcher@sensetime

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