Hi! I tried my code on another machine with 4 processors. It works when I put omp_set_num_threads(2) but only with omp_set_dynamic(true) and I noticed on htop that only one processor is used per request. When I force the use of 2 processors with omp_set_dynamic(false), it segfaults or deadlocks, as it does with 3 or 4 processors and on my 2 processors machine. So I didn't solve the problem yet :-((. So, anyone has an idea of the problem? Thanks -- View this message in context: http://old.nabble.com/Problem-with-an-openMP-and-pthread-program-compiled-with-gcc-tp29173546p29235078.html Sent from the gcc - Help mailing list archive at Nabble.com.