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PaulStoffregen / CoreMark

Benchmark CPU Performance on Arduino Compatible Boards
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update SAMD51 deets #2

Closed ladyada closed 4 years ago

ladyada commented 4 years ago

hiya, the teensy 3.2 speed listing (218.26) is with 96MHz overclock/faster compile-time settings. If you were to pick "smaller" code and "72MHz" its Iterations/Sec : 126.76

To have a comparable SAMD51 measurement, please select 180MHz overclock/'faster' compile flags, which is Iterations/Sec : 458.19 or 200MHz/"dragons" for Iterations/Sec : 536.35

I'll submit a PR as well!

PaulStoffregen commented 4 years ago

Yeah, as the table expands with more results, probably best to add few columns for CPU type, clock speed, whether the speed is standard or overclocked. On our forum some folks are already talking about altering compiler flags, which adds a whole 'nother dimension of complexity.

So far, I only ran each board with its default settings, and only the ones that are on my desk.

ladyada commented 4 years ago

totally understand - we're very conservative with initial settings but the SAMD51 is very happy to be overclocked just like the teensy 3.2 which is why we have the dropdowns :)

https://learn.adafruit.com/introducing-adafruit-itsybitsy-m4/adapting-sketches-to-m0#m4-performance-options-7-20

PaulStoffregen commented 4 years ago

The other interesting thing about SAMD51 is how differently it performs on the digital signature test. So far I haven't looked into which of CoreMark's 3 tests are doing better or worse on various chips. The CoreMark code comes with pretty strong guidelines not to modify anything other than the "portme" files, and even in those you're only supposed to do pretty specific things so as not to taint the benchmark. Not sure if there's a way to get that info without editing those other files.

ladyada commented 4 years ago

yah not sure, i just ran the sketch as-is