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Repairs and clean-ups regarding tuning and profiling #581

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Repairs and clean-ups regarding tuning and profiling #581

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czurnieden
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  • added tuning and graphics to cmake
  • removed RTDSC based timers
  • gnuplot generated plots via tune_it.sh
  • tuning is available in makefile.shared now

@czurnieden
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Changes from the additional tuning are small but YMMV, as always.

@czurnieden czurnieden requested a review from sjaeckel June 16, 2024 02:03
@czurnieden
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CMake is a bit more complicated once it gets a bit more complicated *sigh*

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Ah, forgot: cannot check if the windows part works. Will somebody who can take a look, please?

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Well…
I posted at stackoverflow although I doubt it.

But I found a working CMake formatter so my search wasn't a complete waste ;-)

@czurnieden
- added tuning and graphics to cmake
6fa425e 
 - replaced RTDSC timers with a more standard one
 - made gnuplot generated plots available via tune_it.sh
 - moved timing points in tune.c to avoid elimination by
   optimization
@czurnieden
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Rewound the CMake part (including the formatting, sorry) and collapsed the commits.

I think I found the problem with the odd results in tuning. We use "-O3" for tuning for a good reason but it has a side effect. With checks included (option -c for tune.c) the numbers are all reasonable, especially the first higher T-C-squarings after TC-3 that was really off. Not switched on here–nothing higher than TC-3–but put in this comment such that I do not forget it later.

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Timer works with MSVC, at least in Godbolt's Compiler Explorer, I just couldn't get it work under Wine. Probably too old.

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@sjaeckel sjaeckel Awaiting requested review from sjaeckel

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@czurnieden