Actually, you're right. OpenMP allows you to choose between "static" scheduling (where it would just cut the 100-iteration loop into 0..24, 25..49, 50..74, 75..

Actually, you're right. OpenMP allows you to choose between "static" scheduling (where it would just cut the 100-iteration loop into 0..24, 25..49, 50..74, 75..99 if you have four processors) and "dynamic" scheduling with a specifiable block size (where it would, for a block size of 10, first chop off four iteration blocks of 0..9, 10..19, 20..29, 30..39, and allocate the other six blocks depending on which processor wants more work first). According to the OpenMP tutorial, the default for OMP_SCHEDULE is implementation dependent, and the gcc OpenMP implementation uses dynamic scheduling with a chunk size of 1 by default.