We have just seen how to call a pure-C function from Ctypes. In some ways, this may seem a little inelegant, as our binary file must contain both host code as well as the compiled GPU code, which may seem cumbersome. Can we just use pure, compiled GPU code and then launch it appropriately onto the GPU without writing a C wrapper each and every time? Fortunately, we can.
The NVCC compiler compiles CUDA-C into PTX (Parallel Thread Execution), which is an interpreted pseudo-assembly language that is compatible across NVIDIA 's various GPU architectures. Whenever you compile a program that uses a CUDA kernel with NVCC into an executable EXE, DLL, .so, or ELF file, there will be PTX code for that kernel contained within the file. We can also directly compile a file with the extension PTX, which will contain only the compiled GPU kernels from...
