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simulator is really cycle accurate?

Jogging Song
Intellectual 685 points

Hi, all

      Nowadays I need optimze some functions to improve performance after runnint the programming

successfully on the EVM. After reading the documents, I learn that I have to use simulators in order to

profiling the program. Indeed the simulator is very slow. It is the first time that a simulator can be cycle

accurate. From my experience of DSPs from other vendors, a simulator can only count cycles, and can't

simulate the memory. Can anyone tell me more about how simulators can be cycle accurate. other I will

doubt whether the result is cycle accurate.

Thanks

Jogging

  • 0
    TI__Guru*** 125430 points

    It can simulate the internal memory, including cache hits and misses.  I don't think it simulates external memory, though admittedly I don't use the simulators often.

  • 0 in reply to Brad Griffis
    Intellectual 685 points

    I do initial optimization on the development board. Now I want to know the cache use.

    It seems I have to use a simulator. But it is very time -cousuming.

    I hope TI can improve its on-chip profile function.

    Best Regards

    Jogging

  • 0 in reply to Jogging Song
    TI__Intellectual 755 points

    Hi Jogging,

    Which device in particular are you interested in? We have highly cycle accurate device simulators for various C64x+ based devices. We also have the CPU only and Megamodule only Cycle accurate simulators.

    The C64x+ simulators provide the following cache event counts:

    L1D & L2P hits, missess, conflict missess, L2 hits, missess & conflict misses, L1D, L1P and L2 SRAM accesses; snoops, victims...

    You can get the above counts in both the CCS function profiler and through the Analysis Toolkit Code Coverage and Multi-event Profiler tool.

    I would be happy to help.

    Regards,

    Anuradha.

     

  • 0 in reply to Anuradha Krishnan
    Intellectual 685 points

    Hi, Anuradha

           Nowadays the device i am using is DM6437.  I am developing image processing application on DM6437.

    After inital optimization, I hope to further optimize the algorithms. But the simulator is slow.

    I hope TI could put an on-chip profiling module like another DSP vendor. Then TI's DSP will be more

    cool.

    Best Regards

    Jogging