Test for untied clause. First generate a set of tasks and pause it immediately. Then we resume half of them and check whether they are scheduled by different threads 3.0 omp task untied omp taskwait INCLUDE "omp_my_sleep.f" INTEGER FUNCTION omp_task_untied() IMPLICIT NONE INCLUDE "omp_testsuite.f" EXTERNAL my_sleep INTEGER omp_get_num_threads, omp_get_thread_num INTEGER myj INTEGER i,j INTEGER cnt INTEGER start_tid(NUM_TASKS) INTEGER current_tid(NUM_TASKS) COMMON /orphvars/ j, cnt, start_tid, current_tid cnt = 0 do i = 1, NUM_TASKS start_tid(i) = 0 current_tid(i) = 0 end do !$omp parallel private(myj) shared(j) !$omp single do i=1, NUM_TASKS j = i myj = j !$omp task untied call my_sleep(SLEEPTIME) start_tid(myj) = omp_get_thread_num() !$omp taskwait if (MOD(start_tid(myj),2) .ne. 0) then call my_sleep(SLEEPTIME) current_tid(myj) = omp_get_thread_num() else current_tid(myj) = omp_get_thread_num() end if !$omp end task end do !$omp end single !$omp end parallel = 0 ! check if at least one untied task switched threads do i=1, NUM_TASKS if (current_tid(i) .ne. start_tid(i)) then = 1 end if end do END FUNCTION