BLAS and CUBLAS

Question

I'm wondering about Nvidia's CUBLAS Library. Does anybody have experience with it? For example if I write a C program using BLAS will I be able to replace the calls to BLAS with calls to CUBLAS? Or even better implement a mechanism which let's the user choose at runtime?

What about if I use the BLAS Library provided by Boost with C++?

Answer 1

CUBLAS is, IIRC, API compatible with the standard BLAS. So switching from standard BLAS to CUBLAS should be as simple as relinking your application. If you want it selectable at runtime, one option would be to use dlopen() or equivalent to open an .so at runtime.

Boost uBLAS is, again IIRC, partly a wrapper around standard BLAS, so it should be possible to configure it so that you link to CUBLAS.