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time_gpu.h
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37 
38 #ifndef PCL_CUDA_TIME_GPU_H_
39 #define PCL_CUDA_TIME_GPU_H_
40 
41 #include <cuda.h>
42 #include <pcl/cuda/cutil_inline.h>
43 
44 namespace pcl
45 {
46  namespace cuda
47  {
48  /**
49  * \brief Class to measure the time spent in a scope
50  *
51  * To use this class, e.g. to measure the time spent in a function,
52  * just create an instance at the beginning of the function.
53  */
54  class ScopeTimeGPU
55  {
56  public:
57  /** \brief Constructor. */
58  inline ScopeTimeGPU (const char* title) : title_ (title)
59  {
60  start ();
61  }
62 
63  /** \brief Destructor. */
64  inline ~ScopeTimeGPU ()
65  {
66  stop ();
67  std::cerr << title_ << " took " << elapsed_time_ << "ms.\n";
68  }
69 
70  /** \brief Start the timer. */
71  inline void
72  start ()
73  {
74  CUT_CHECK_ERROR ("dude");
75  cutilSafeCall (cudaEventCreate (&start_));
76  cutilSafeCall (cudaEventCreate (&end_));
77 
78  cutilSafeCall (cudaEventRecord (start_, 0));
79  }
80 
81  /** \brief Stop the timer. */
82  inline void
83  stop ()
84  {
85  CUT_CHECK_ERROR ("dude");
86  // Measure time needed to copy data
87  cutilSafeCall (cudaThreadSynchronize ());
88  cutilSafeCall (cudaEventRecord (end_, 0));
89  cutilSafeCall (cudaEventSynchronize (end_));
90  cutilSafeCall (cudaEventElapsedTime (&elapsed_time_, start_, end_));
91 
92  cutilSafeCall (cudaEventDestroy (end_));
93  cutilSafeCall (cudaEventDestroy (start_));
94  }
95 
96  /** \brief Stop and print the timer. */
97  inline void stop_print ()
98  {
99  stop ();
100  std::cerr << title_ << " took " << elapsed_time_ << "ms.\n";
101  }
102 
103 
104  private:
105  cudaEvent_t start_;
106  cudaEvent_t end_;
107 
108  float elapsed_time_;
109 
110  std::string title_;
111  };
112  } // namespace
113 } // namespace
114 
115 #endif //#ifndef PCL_CUDA_TIMER_H_
This file defines compatibility wrappers for low level I/O functions.
Definition: convolution.h:45
void start()
Start the timer.
Definition: time_gpu.h:72
void stop()
Stop the timer.
Definition: time_gpu.h:83
Class to measure the time spent in a scope.
Definition: time_gpu.h:54
void stop_print()
Stop and print the timer.
Definition: time_gpu.h:97
ScopeTimeGPU(const char *title)
Constructor.
Definition: time_gpu.h:58
~ScopeTimeGPU()
Destructor.
Definition: time_gpu.h:64