如何测量 NVIDIA CUDA 中的内核时间? [英] How to measure the inner kernel time in NVIDIA CUDA?

问题描述

我想测量GPU的时间内核，如何在NVIDIA CUDA中测量它?例如

I want to measure time inner kernel of GPU, how how to measure it in NVIDIA CUDA? e.g.

__global__ void kernelSample()
{
  some code here
  get start time 
  some code here 
  get stop time 
  some code here
}

推荐答案

试试这个，它以毫秒为单位测量 2 个事件之间的时间.

Try this, it measures time between 2 events in milliseconds.

  cudaEvent_t start, stop;
  float elapsedTime;

  cudaEventCreate(&start);
  cudaEventRecord(start,0);

 //Do kernel activity here

 cudaEventCreate(&stop);
 cudaEventRecord(stop,0);
 cudaEventSynchronize(stop);

 cudaEventElapsedTime(&elapsedTime, start,stop);
 printf("Elapsed time : %f ms
" ,elapsedTime);

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