int main(void) {
struct sched_attr* attr;
ALLOCATE_GUARD(attr, 'x');
test_assert(0 == sched_getattr(0, attr, sizeof(*attr), 0));
/* Don't check specific scheduling parameters in case someone
is running the rr tests with low priority or something like that */
test_assert(attr->size == sizeof(*attr));
test_assert(attr->flags == 0);
VERIFY_GUARD(attr);
test_assert(0 == sched_setattr(0, attr, 0));
VERIFY_GUARD(attr);
atomic_puts("EXIT-SUCCESS");
return 0;
}
static void show_sched_pid_info(struct chrt_ctl *ctl, pid_t pid)
{
int policy, reset_on_fork = 0, prio = 0;
#ifdef SCHED_DEADLINE
uint64_t deadline = 0, runtime = 0, period = 0;
#endif
/* don't display "pid 0" as that is confusing */
if (!pid)
pid = getpid();
#ifdef HAVE_SCHED_SETATTR
{
struct sched_attr sa;
if (sched_getattr(pid, &sa, sizeof(sa), 0) != 0)
err(EXIT_FAILURE, _("failed to get pid %d's policy"), pid);
policy = sa.sched_policy;
prio = sa.sched_priority;
reset_on_fork = sa.sched_flags & SCHED_FLAG_RESET_ON_FORK;
deadline = sa.sched_deadline;
runtime = sa.sched_runtime;
period = sa.sched_period;
}
#else /* !HAVE_SCHED_SETATTR */
{
struct sched_param sp;
policy = sched_getscheduler(pid);
if (policy == -1)
err(EXIT_FAILURE, _("failed to get pid %d's policy"), pid);
if (sched_getparam(pid, &sp) != 0)
err(EXIT_FAILURE, _("failed to get pid %d's attributes"), pid);
else
prio = sp.sched_priority;
# ifdef SCHED_RESET_ON_FORK
if (policy == (SCHED_FIFO|SCHED_RESET_ON_FORK) || policy == (SCHED_BATCH|SCHED_RESET_ON_FORK))
reset_on_fork = 1;
# endif
}
#endif /* !HAVE_SCHED_SETATTR */
if (ctl->altered)
printf(_("pid %d's new scheduling policy: %s"), pid, get_policy_name(policy));
else
printf(_("pid %d's current scheduling policy: %s"), pid, get_policy_name(policy));
if (reset_on_fork)
printf("|SCHED_RESET_ON_FORK");
putchar('\n');
if (ctl->altered)
printf(_("pid %d's new scheduling priority: %d\n"), pid, prio);
else
printf(_("pid %d's current scheduling priority: %d\n"), pid, prio);
#ifdef SCHED_DEADLINE
if (policy == SCHED_DEADLINE) {
if (ctl->altered)
printf(_("pid %d's new runtime/deadline/period parameters: %ju/%ju/%ju\n"),
pid, runtime, deadline, period);
else
printf(_("pid %d's current runtime/deadline/period parameters: %ju/%ju/%ju\n"),
pid, runtime, deadline, period);
}
#endif
}
