[marcan_42]

The AGX GPU MMU (variously called "GART" and "UAT", no relation to AGP GART) uses the ARM64 page table format (the GPU coprocessor literally uses it as an ARM page table among other things), so I'd expect it to support huge pages just fine since ARM64 does too. I don't know if macOS supports them, though.

The page size is indeed 16K. I don't know if 4K is supported at all in the GPU.

I agree though, the article reads like a rambly piece that doesn't follow and really just boils down to "my code runs slow on this machine and I'm going to blame the architecture" without going into proper details.