How to “multithread” C code

Question

I have a number crunching application written in C. It is kind of a main loop that for each value calls, for increasing values of \"i\", a function that performs some calcul

Answer 1

Intel's C++ compiler is actually capable of automatically paralellizing your code. It's just a compiler switch you need to enable. It doesn't work as well as OpenMP though (ie. it doesn't always succeed or resulting program is slower). From Intel's website: "Auto-parallelization, which is triggered by the -parallel (Linux* OS and Mac OS* X) or /Qparallel (Windows* OS) option, automatically identifies those loop structures that contain parallelism. During compilation, the compiler automatically attempts to deconstruct the code sequences into separate threads for parallel processing. No other effort by the programmer is needed."