some more priority tweaks

src/mod/endpoints/mod_sofia/sofia.c

@@ -1650,7 +1650,7 @@ void sofia_msg_thread_start(int idx)
 
 				switch_threadattr_create(&thd_attr, mod_sofia_globals.pool);
 				switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
-				switch_threadattr_priority_set(thd_attr, SWITCH_PRI_REALTIME);
+				//switch_threadattr_priority_set(thd_attr, SWITCH_PRI_REALTIME);
 				switch_thread_create(&mod_sofia_globals.msg_queue_thread[i], 
 									 thd_attr, 
 									 sofia_msg_thread_run, 
@@ -2376,7 +2376,7 @@ switch_thread_t *launch_sofia_worker_thread(sofia_profile_t *profile)
 
 	switch_threadattr_create(&thd_attr, profile->pool);
 	switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
-	switch_threadattr_priority_set(thd_attr, SWITCH_PRI_REALTIME);
+	//switch_threadattr_priority_set(thd_attr, SWITCH_PRI_REALTIME);
 	switch_thread_create(&thread, thd_attr, sofia_profile_worker_thread_run, profile, profile->pool);
 
 	while (!sofia_test_pflag(profile, PFLAG_WORKER_RUNNING)) {

src/switch_core.c

@@ -736,7 +736,7 @@ SWITCH_DECLARE(int32_t) set_realtime_priority(void)
 	char data[] = "-1\n";
 	struct sched_param sched = { 0 };
 	sched.sched_priority = SWITCH_PRI_LOW;
-	if (sched_setscheduler(0, SCHED_RR, &sched)) {
+	if (sched_setscheduler(0, SCHED_FIFO, &sched)) {
 		sched.sched_priority = 0;
 		if (sched_setscheduler(0, SCHED_OTHER, &sched)) {
 			return -1;