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How to get ARM processor load?

Jose Lopez1
Intellectual 835 points

Hi, I am running an ARM app that does some math calculations over data. I would like to know (if possible, easy) way to get CPU load when application runs. 

I am using evmDM8168, ezsdk-5_05_01_04.

I am thinking on:

an API the ezsdk offers so the application can colect CPU info at runtime,

or

some command-line utility that logs the CPU stats (for example into a file) before and after the application runs, so it can be inspected later.

What options do I have? , Thanks

- Jose L.

  • 0
    TI__Genius 11470 points

    Hi,

    Needing additional shell prompt (to type there "top" for example) you could try to connect the board to your local network and to use SSH. Please, search the Internet for some SSH guides, if necessary.

    Thank you.

    BR
    Vladimir

  • 0 in reply to Vladimir-XID
    Intellectual 835 points

    Hi Vladimir, you are right. Now i have a setup so i can work with the filesystem via serial using termnet. 

    Happens that I used

    top -d 1 > dm81_log.txt 

    My ARM application appears on top command output, but it show that load is 0% (took several samples and all are the same). Maybe the time between each sample is not enough, alternatively i tried the command on Ubuntu PC, and I can run the command with the "d" delay option as float, 

    top -d 0.15 > ubuntu_log.txt

    This delay input format is not supported on the board, is there a particular package the board needs to support this input format? Or other way to have more samples for an specific time interval?  -Regards

    - Jose L.

  • 0 in reply to Jose Lopez1
    TI__Genius 11470 points

    Hi Jose,

    If such delay is really needed you could try to cross compile "top" (or "ps"), or different busybox (that could support it). Or maybe a shell script could be used, with short "sleep" and passing "-n 1" to "top". I don't know.

    Various things could be the cause, try to exclude possibilities.

    Thank you.

    BR
    Vladimir