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Cycle count in cortex m3

devipriya karlapudi
Note: This was originally posted on 10th December 2009 at http://forums.arm.com

Hi all,
I am new to cortex m3...
For my application I need to calculate the number of cycles for a particular function....
I set the debug options as high optimization level and optimize for time....

How can I calculate the MIPS/cycles manually for a particular function.
Please suggest me a solution...

Thanks in advance.
Krish.
Parents
  • Note: This was originally posted on 10th December 2009 at http://forums.arm.com

    If so how to start with realview debugger?(any settings).

    The ISSM for Cortex-M3 is semi-accurate. It models an ideal memory sub-system. Not sure about the pipeline accuracy, but I guess CM3 is simple enough.

    If you are really concerned about accuracy, get a cheap eval board and read the cycle count register in the DWT unit.

    Regards
    Marcus
Reply
  • Note: This was originally posted on 10th December 2009 at http://forums.arm.com

    If so how to start with realview debugger?(any settings).

    The ISSM for Cortex-M3 is semi-accurate. It models an ideal memory sub-system. Not sure about the pipeline accuracy, but I guess CM3 is simple enough.

    If you are really concerned about accuracy, get a cheap eval board and read the cycle count register in the DWT unit.

    Regards
    Marcus
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