Kind of, there is https://shader-playground.timjones.io/ Additionally you can select CUDA C++ or PTX on compiler explorer.

Generated code for RDNA 1: https://shader-playground.timjones.io/5d3ece620f45091678dcee...

Yeah, sometimes atomics perform way better than you expect them to. Check out the linkedlist benchmark in my suite, 12.1 G elements/s on AMD 5700 XT using DX12. That's a respectable fraction of raw memory bandwidth. Carrying over intuition from CPU land, you'd expect it to be very slow. Looking at…

Indeed, for Matt Godbolt, and the whole community that has added the remaining AOT languages, .NET is one of the few missing from Compiler Explorer, but it has a similar one at https://sharplab.io/ and there is one at http://shader-playground.timjones.io/ for GPGPU shaders. Here is one talk from…

Thanks for the great list of resources for debugging gpu performance! Android GPU Inspector and http://shader-playground.timjones.io/ all look pretty cool. Do you have any other debugging tips or tooling recommendations for a complete graphics noob? I have only done one webgl project before but…

This is a pretty deep topic. The best resource I've found is: https://fgiesen.wordpress.com/2011/07/09/a-trip-through-the-... I'll also do my best to answer your questions, though I won't be able to do them justice in this space. A pretty good model for GPUs is remote procedure calls. When you want…

Right, I haven't looked at PTX or Intel Gen ASM, but on AMD this compiles to a lg(n) series of add instructions each with a warp local shuffle (v_add_nc_u32 with a row_shr: modifier). It's not going to shared memory. I've experimented a bit with hand-rolling scans (using subgroupShuffleUp) and get…