Simple File I/O in Cuda C++

Question

Im working on Cuda C++ right now. But I'm having problems about reading and writing into files with CUDA.

How can I implement file input output processes in Cuda C++?

I wanna read .obj files into my Cuda kernel.

What should i do?

Answer 1

Read the file using ordinary host (C++) file operations. Then transfer the data to the device if you need it there, using ordinary cudaMalloc and cudaMemcpy operations.

You won't be able to implement file I/O directly in CUDA C++, as there is no API for this and the GPU does not connect directly to the file system. You have to go through the OS for file system services.