OpenMP compiler and runtime?

OpenMP doesn't really have, or need, anything like the . NET CLR. Compilers typically produce code which uses one or other of the approaches to threading already installed on the platform.

There are also a few environment variables which OpenMP programs may want to use, but that hardly constitues a run-time system either.

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Does openMP have a runtime (like . NET CLR on top of operating system) or just a compiler? Openmp link|improve this question asked Sep 22 '10 at 8:42r00kie13714 38% accept rate.

OpenMP doesn't really have, or need, anything like the . NET CLR. Compilers typically produce code which uses one or other of the approaches to threading already installed on the platform.

There are also a few environment variables which OpenMP programs may want to use, but that hardly constitues a run-time system either. I've never come across an OpenMP compiler which needed a separate installation of a run time system or anything like one. EDIT: An OpenMP installation also needs to provide functions such as omp_get_thread_num which are usually packaged in a library of some sort.

I agree. I am confused because I read on DrDobbs about openMP runtime, and the article even claims that some implementations create thread pool. – r00kie Sep 23 '10 at 2:04 OpenMP programs will often create a thread pool, or, perhaps more accurately, often have the operating system create a thread pool.

Which is something most o/s can do without added software. – High Performance Mark Sep 23 '10 at 5:51.

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