The following code snippet is a host-side timing routine around a kernel call (error handling is omitted):
float start = …;//getting the first time-stamp clEnqueueNDRangeKernel(g_cmd_queue, …); clFinish(g_cmd_queue);// to make sure the kernel completed float end = …;//getting the last time-stamp float time = (end-start);
In this example, host-side timing is implemented using the following functions:
clEnqueueNDRangeKernel
puts a kernel to a queue and
immediately returnsclFinish
explicitly indicates the completion of kernel
execution. You can also use clWaitForEvents
.Remember to profile operations on memory objects separately.