Tic toc vs profiler for Arduino

Question

Martijn Kortenhoeven 2020-5-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/525900-tic-toc-vs-profiler-for-arduino

评论： Walter Roberson 2020-5-16

Hello everyone,

I am trying to optimize a quadratic program solver for use in realtime on an Arduino for a control process. I have programmed two solvers, let's call them Solver 1 and Solver 2. When I use tic toc, there is almost no difference in computation time, but when I use the profiler, Solver 2 is almost 20 times faster than Solver 1. I read somewhere that the profiler only uses a single thread, while tic toc tends more to real time performance.

My question is: would I notice this significant performance increase when using Solver 2 on an Arduino, or would performance be similar using Solver 1? I am not that familier with an Arduino, and am also unable to test code on an Arduino unfortunately, but I could imagine that an Arduino could only use a single thread. Any insight would be greatly appreciated.

Martijn

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Walter Roberson 2020-5-16

If reducing to one thread does not change much then probably they will be close on the arduino.

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Answer 1

Walter Roberson 2020-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/525900-tic-toc-vs-profiler-for-arduino#answer_432797

You can get an idea by changing the number of threads to 1

https://www.mathworks.com/help/matlab/ref/maxnumcompthreads.html

Profile is not a good estimation of real time, as profiling disables optimization by the execution engine.

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Martijn Kortenhoeven 2020-5-16

Thanks for your response! Do you think that would give an accurate representation of using it on an Arduino. I just tried the function you suggested but it does not deliver a major difference compared to tic toc. I also tried the timeit function.

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