gboolean
arv_make_thread_realtime (int priority)
{
struct sched_param p;
memset(&p, 0, sizeof(p));
p.sched_priority = priority;
if (sched_setscheduler(_gettid (), SCHED_RR|SCHED_RESET_ON_FORK, &p) < 0
&& errno == EPERM) {
struct rlimit rlim;
GDBusConnection *bus;
GError *error = NULL;
memset(&rlim, 0, sizeof(rlim));
rlim.rlim_cur = rlim.rlim_max = 100000000ULL; /* 100ms */
if ((setrlimit(RLIMIT_RTTIME, &rlim) < 0)) {
arv_warning_misc ("Failed to set RLIMIT_RTTIME: %s", strerror (errno));
return FALSE;
}
bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);
if (error != NULL) {
arv_warning_misc ("Failed to connect to system bus: %s", error->message);
g_error_free (error);
return FALSE;
}
arv_rtkit_make_realtime(bus, _gettid (), p.sched_priority, &error);
g_object_unref (bus);
if (error != NULL) {
arv_warning_misc ("Failed to connect make realtime: %s", error->message);
g_error_free (error);
return FALSE;
}
arv_debug_misc ("Thread became realtime with priority %d", priority);
return TRUE;
}
return TRUE;
}
int main(int argc, char *argv[]) {
GDBusConnection *bus;
GError *error = NULL;
int max_realtime_priority, min_nice_level;
long long rttime_usec_max;
struct rlimit rlim;
bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);
if (!G_IS_DBUS_CONNECTION (bus)) {
fprintf (stderr, "Failed to connect to system bus: %s\n", error->message);
g_error_free (error);
return EXIT_FAILURE;
}
max_realtime_priority = arv_rtkit_get_max_realtime_priority (bus, &error);
if (error != NULL) {
fprintf (stderr, "Failed to get MaxRealtimePriority: %s\n", error->message);
g_error_free (error);
error = NULL;
} else
printf ("MaxRealtimePriority = %d\n", max_realtime_priority);
min_nice_level = arv_rtkit_get_min_nice_level (bus, &error);
if (error != NULL) {
fprintf (stderr, "Failed to get MinNiceLevel: %s\n", error->message);
g_error_free (error);
error = NULL;
} else
printf ("MinNiceLevel = %d\n", min_nice_level);
rttime_usec_max = arv_rtkit_get_rttime_usec_max (bus, &error);
if (error != NULL) {
fprintf (stderr, "Failed to get RTTimeUSecMax: %s\n", error->message);
g_error_free (error);
error = NULL;
} else
printf ("RTTimeUSecMax = %Ld\n", rttime_usec_max);
memset(&rlim, 0, sizeof(rlim));
rlim.rlim_cur = rlim.rlim_max = 100000000ULL; /* 100ms */
if ((setrlimit(RLIMIT_RTTIME, &rlim) < 0))
fprintf(stderr, "Failed to set RLIMIT_RTTIME: %s\n", strerror(errno));
print_status("before");
arv_rtkit_make_high_priority (bus, 0, -10, &error);
if (error != NULL) {
fprintf (stderr, "Failed to become high priority: %s\n", error->message);
g_error_free (error);
error = NULL;
} else
printf ("Successfully became high priority\n");
print_status("after high priority");
arv_rtkit_make_realtime (bus, 0, 10, &error);
if (error != NULL) {
fprintf (stderr, "Failed to get become realtime: %s\n", error->message);
g_error_free (error);
error = NULL;
} else
printf ("Successfully became realtime\n");
print_status("after realtime");
g_object_unref (bus);
return EXIT_SUCCESS;
}