possible error in omp implementation

[Try2Code]

saxpy-benchmark/src/saxpy_omp.cpp

Line 22 in fb811ad

for (int i=omp_get_thread_num(); i<N; i+=num_threads)

hi!
I think this for loop is not correct because

• the loop counter is set to start with thread ID - I see no reason why I should write a loop like this
• the #pragma omp parallel for is missing - this lead to version essentially being a cpu version. infact, their speed is very similar. on my machine

I am currently working on a version with GPU offloading (clang-9, gcc-8)