Enhancing the speed of DM6437

This is a discussion on Enhancing the speed of DM6437 within the C++ Programming forums, part of the General Programming Boards category; Hi, We are testing many image processing algorithms of some libraries (Opencv, Imglib and Vlib) on our EVM platform DM6437, ...

  1. #1
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    Enhancing the speed of DM6437

    Hi,

    We are testing many image processing algorithms of some libraries (Opencv, Imglib and Vlib) on our EVM platform DM6437, but we noticed that the exuction of these algorithms is very slow (with a delayed period of time). Whereas, we must have a real time execution of them.

    In fact I have some questions:

    As I said we use the DSP TMS320DM6437, How can I know:

    *who is faster: Char, Short or Long int?
    * Is it always advisable to use the cache memory in order to declare variables?
    * When it's recommanded to use an assembly code instead of C code, and can we have a mixture of assembly and C code in one program?
    * Is there a difference between C and C++ programs in the scale of "speed of time execution".

    In fact,if anyone has an idea who can I make the execution of the DSP go faster don't hesitate to post it in this forum.

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    *who is faster: Char, Short or Long int?
    The x-bit integer, where x is the bus / memory / register width of the machine you're using.

    * Is it always advisable to use the cache memory in order to declare variables?
    cache memory is used based on the frequency of memory references determined at run-time. If you hit a variable often enough, it will be in cache memory without you having to do any extra work.

    * When it's recommanded to use an assembly code instead of C code,
    When you've run a profiler, and found the 10% of the code that is taking 90% of the time.
    Trying to guess where the bottlenecks are "a priori" is a fools game.

    * and can we have a mixture of assembly and C code in one program?
    Almost all C compilers support this notion to a greater or lesser extent.

    * Is there a difference between C and C++ programs in the scale of "speed of time execution".
    Choosing the best algorithm will have FAR more impact on the performance than the choice of implementation language. Providing the programmers are of comparable skill, their efficiency in the 90% of the code which doesn't matter (see above) isn't going to make a difference (at least none you can predict in advance).
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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    Hello everybody,

    My project is to implement an OPENCV algorithm to the TMS320DM6437 board using CCStudio.
    my problem is :

    How to configure ccstudio with OPENCV?
    How to impliment an OPENCV program in DM6437 board ?

    Feel free to contact me if you have an idea, I'm really stuck!!!

    Thank you in advance.
    Last edited by jben; 07-19-2010 at 08:46 AM.

  4. #4
    and the hat of wrongness Salem's Avatar
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    Well no response from the OP, and the "me too" hijackers have arrived.
    Thread is now pointless.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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