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diku-dk / futhark-benchmarks

Various Futhark benchmark programs
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Mandelbrot for language benchmark game #12

Open flip111 opened 4 years ago

flip111 commented 4 years ago

I saw there is already a mandelbrot implementation though that one seems to have some additional stuff to it like a GUI and keyboard controls.

It would be great to have just the mandelbrot as described here so there is something to compare to.

I'm not sure how the mandelbrot from the language benchmark game can be written out as a pretty bitmap. That would be useful too to showcase futhark to do something cool and to do it fast.

Are there any other futhark examples that can be compiled into a library (preferably just a single fut file) that can do something cool as a showcase?

athas commented 4 years ago

Why is that useful? It's almost the same program as the one we have, only with a slightly different color function (but that isn't where the time is spent).

If you don't want the GUI, you can benchmark it simply with futhark bench --backend=opencl mandelbrot.fut.

If you want to compile it as a library, just do futhark opencl --library mandelbrot32.fut. The GUI stuff is implemented as an add-on in mandelbrot-gui.fut; most of the Futhark code just computes an image.

flip111 commented 4 years ago

I was just looking for a nice showcase of futhark. This was the main thing. Mandelbrot seemed like a good one because it gives some great visuals and there is also code written in other languages to compare it to. It then would help if the code produces the exact same picture.

Thanks for the compilation instructions for the library, i will try to build this library and then call it to generate a mandelbrot function.

What about mandelbrote64.fut? Is it faster or is it more precise?

athas commented 4 years ago

It is more precise (uses double precision), but on most GPUs it will be significantly slower.