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tde_m's avatar
tde_m
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

Wall Clock Time on Device

Hello, is there a way in Intel FPGA OpenCL to get the wall clock time (in clock cycles) directly on the device? This could be useful, for example, to profile the occurrence of certain events. ...
AnilErinch_A_Intel's avatar
AnilErinch_A_Intel
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi ,

You have two other options also to measure the time.

Method1:


cl_int status;

cl_ulong start, end, elapsed_time;

cl::Event myevent();

cl::CommandQueue myqueue(context, device, CL_QUEUE_PROFILING_ENABLE, &status);

myqueue.enqueue…(…, &myevent);

status = myevent.getProfilingInfo(CL_PROFILING_COMMAND_START, &start);

status = myevent.getProfilingInfo(CL_PROFILING_COMMAND_END, &end, NULL);

elapsed_time = end - start;//Time it took for the task to run in nanoseconds​

Method2:

You can also use the dynamic profiler described here on this YouTube video. https://youtu.be/nyivIknJaV8?t=2437


Thanks and Regards

Anil


  • tde_m's avatar
    tde_m
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Hi Anil,

    yes, I was aware of these solutions.

    But none of them allow me what I wanted (measure time directly on device).

    Should I assume that there is no way of obtaining the wall clock time / a clock cycle counter directly on the device?

    Thanks