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How to rate performance without hardware

Michal Szymanski
Note: This was originally posted on 8th July 2012 at http://forums.arm.com

Hi,
I'm using DS-5 with armcc. Is there any way to rate code performance without running it on hardware e.g. with profiling? My typical development cycle looks like: make some small change in loop, check if that improves performance, if yes make further changes in same direction, if no go back to entry point and try something else. E.g. compiler for TI DSPs can generate assembly files with pipeline information, like iteration intervals for loops. I'm looking for something similar for arm, because for now --asm option allow me only to manually check assembly code, no straight information about performance. TI also offers cycle accurate simulator, but I guess there is no such thing for arm. If this matters, my current platform is Cortex-A9.
Thanks in advance for any suggestions.

regards
MS
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  • Note: This was originally posted on 9th July 2012 at http://forums.arm.com

    I've used cycle accurate simulator just as opposite to functional one, such as qemu-arm. I will try that RTSM simulator which  comes with DS-5, maybe it will be fine for my purpose. I agree, that cache might be critical, but still - I can't make real hw profiling after each little change.
    Thanks.
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  • Note: This was originally posted on 9th July 2012 at http://forums.arm.com

    I've used cycle accurate simulator just as opposite to functional one, such as qemu-arm. I will try that RTSM simulator which  comes with DS-5, maybe it will be fine for my purpose. I agree, that cache might be critical, but still - I can't make real hw profiling after each little change.
    Thanks.
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