Added ITTI timer support for RTAI builds (timers must only be used from non RT tasks).

Blocked message sending to ended tasks.
Modified lte-softmodem to use ITTI signal handling.
Uniformized lte-softmodem and oaisim with ITTI handling.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4607 818b1a75-f10b-46b9-bf7c-635c3b92a50f

common/utils/itti/intertask_interface.c

@@ -339,54 +339,67 @@ int itti_send_msg_to_task(task_id_t destination_task_id, instance_t instance, Me
         vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_ITTI_ENQUEUE_MESSAGE, VCD_FUNCTION_IN);
 #endif
 
-        /* We cannot send a message if the task is not running */
-        DevCheck(itti_desc.threads[destination_thread_id].task_state == TASK_STATE_READY, itti_desc.threads[destination_thread_id].task_state,
-                 TASK_STATE_READY, destination_thread_id);
+        if (itti_desc.threads[destination_thread_id].task_state == TASK_STATE_ENDED)
+        {
+            ITTI_DEBUG("Message %s, number %lu with priority %d can not be sent from %s to queue (%u:%s), ended destination task!\n",
+                       itti_desc.messages_info[message_id].name,
+                       message_number,
+                       priority,
+                       itti_get_task_name(origin_task_id),
+                       destination_task_id,
+                       itti_get_task_name(destination_task_id));
+        }
+        else
+        {
+            /* We cannot send a message if the task is not running */
+            DevCheck(itti_desc.threads[destination_thread_id].task_state == TASK_STATE_READY, destination_thread_id,
+                     itti_desc.threads[destination_thread_id].task_state, message_id);
 
-        /* Allocate new list element */
-        new = (message_list_t *) malloc (sizeof(struct message_list_s));
-        DevAssert(new != NULL);
+            /* Allocate new list element */
+            new = (message_list_t *) malloc (sizeof(struct message_list_s));
+            DevAssert(new != NULL);
 
-        /* Fill in members */
-        new->msg = message;
-        new->message_number = message_number;
-        new->message_priority = priority;
+            /* Fill in members */
+            new->msg = message;
+            new->message_number = message_number;
+            new->message_priority = priority;
 
-        /* Enqueue message in destination task queue */
-        lfds611_queue_enqueue(itti_desc.tasks[destination_task_id].message_queue, new);
+            /* Enqueue message in destination task queue */
+            lfds611_queue_enqueue(itti_desc.tasks[destination_task_id].message_queue, new);
 
 #if defined(OAI_EMU) || defined(RTAI)
-        vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_ITTI_ENQUEUE_MESSAGE, VCD_FUNCTION_OUT);
+            vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_ITTI_ENQUEUE_MESSAGE, VCD_FUNCTION_OUT);
 #endif
 
 #ifdef RTAI
-        if (itti_desc.threads[TASK_GET_THREAD_ID(origin_task_id)].real_time)
-        {
-            /* This is a RT task, increase destination task messages pending counter */
-            __sync_fetch_and_add (&itti_desc.threads[destination_thread_id].messages_pending, 1);
-        }
-        else
+            if (itti_desc.threads[TASK_GET_THREAD_ID(origin_task_id)].real_time)
+            {
+                /* This is a RT task, increase destination task messages pending counter */
+                __sync_fetch_and_add (&itti_desc.threads[destination_thread_id].messages_pending, 1);
+            }
+            else
 #endif
-        {
-            /* Only use event fd for tasks, subtasks will pool the queue */
-            if (TASK_GET_PARENT_TASK_ID(destination_task_id) == TASK_UNKNOWN)
             {
-                ssize_t write_ret;
-                uint64_t sem_counter = 1;
+                /* Only use event fd for tasks, subtasks will pool the queue */
+                if (TASK_GET_PARENT_TASK_ID(destination_task_id) == TASK_UNKNOWN)
+                {
+                    ssize_t write_ret;
+                    uint64_t sem_counter = 1;
 
-                /* Call to write for an event fd must be of 8 bytes */
-                write_ret = write (itti_desc.threads[destination_thread_id].task_event_fd, &sem_counter, sizeof(sem_counter));
-                DevCheck(write_ret == sizeof(sem_counter), write_ret, sem_counter, destination_thread_id);
+                    /* Call to write for an event fd must be of 8 bytes */
+                    write_ret = write (itti_desc.threads[destination_thread_id].task_event_fd, &sem_counter, sizeof(sem_counter));
+                    DevCheck(write_ret == sizeof(sem_counter), write_ret, sem_counter, destination_thread_id);
+                }
             }
-        }
 
-        ITTI_DEBUG("Message %s, number %lu with priority %d successfully sent from %s to queue (%u:%s)\n",
-                   itti_desc.messages_info[message_id].name,
-                   message_number,
-                   priority,
-                   itti_get_task_name(origin_task_id),
-                   destination_task_id,
-                   itti_get_task_name(destination_task_id));
+            ITTI_DEBUG("Message %s, number %lu with priority %d successfully sent from %s to queue (%u:%s)\n",
+                       itti_desc.messages_info[message_id].name,
+                       message_number,
+                       priority,
+                       itti_get_task_name(origin_task_id),
+                       destination_task_id,
+                       itti_get_task_name(destination_task_id));
+        }
     }
 
 #if defined(OAI_EMU) || defined(RTAI)
@@ -634,6 +647,15 @@ void itti_mark_task_ready(task_id_t task_id)
 }
 
 void itti_exit_task(void) {
+#if defined(OAI_EMU) || defined(RTAI)
+    task_id_t task_id = itti_get_current_task_id();
+
+    if (task_id > TASK_UNKNOWN)
+    {
+        vcd_signal_dumper_dump_variable_by_name(VCD_SIGNAL_DUMPER_VARIABLE_ITTI_RECV_MSG,
+                                                __sync_and_and_fetch (&itti_desc.vcd_receive_msg, ~(1L << task_id)));
+    }
+#endif
     pthread_exit (NULL);
 }
 
@@ -692,12 +714,7 @@ int itti_init(task_id_t task_max, thread_id_t thread_max, MessagesIds messages_i
 
     ITTI_DEBUG("Init: %d tasks, %d threads, %d messages\n", task_max, thread_max, messages_id_max);
 
-#if !defined(RTAI)
-    /* SR: disable signals module for RTAI (need to harmonize management
-     * between softmodem and oaisim).
-     */
-    CHECK_INIT_RETURN(signal_init());
-#endif
+    CHECK_INIT_RETURN(signal_mask());
 
     /* Saves threads and messages max values */
     itti_desc.task_max = task_max;
@@ -799,9 +816,7 @@ int itti_init(task_id_t task_max, thread_id_t thread_max, MessagesIds messages_i
 
     itti_dump_init (messages_definition_xml, dump_file_name);
 
-#ifndef RTAI
-     CHECK_INIT_RETURN(timer_init ());
-#endif
+    CHECK_INIT_RETURN(timer_init ());
 
     return 0;
 }

common/utils/itti/signals.c

@@ -48,10 +48,23 @@
 #include "assertions.h"
 
 #include "signals.h"
+#include "log.h"
+
+#if defined (LOG_D) && defined (LOG_E)
+# define SIG_DEBUG(x, args...)  LOG_D(EMU, x, ##args)
+# define SIG_ERROR(x, args...)  LOG_E(EMU, x, ##args)
+#endif
+
+#ifndef SIG_DEBUG
+# define SIG_DEBUG(x, args...)  do { fprintf(stdout, "[SIG][D]"x, ##args); } while(0)
+#endif
+#ifndef SIG_ERROR
+# define SIG_ERROR(x, args...)  do { fprintf(stdout, "[SIG][E]"x, ##args); } while(0)
+#endif
 
 static sigset_t set;
 
-int signal_init(void)
+int signal_mask(void)
 {
     /* We set the signal mask to avoid threads other than the main thread
      * to receive the timer signal. Note that threads created will inherit this
@@ -73,8 +86,6 @@ int signal_init(void)
     return 0;
 }
 
-extern int timer_handle_signal(siginfo_t *info);
-
 int signal_handle(int *end)
 {
     int ret;
@@ -113,24 +124,24 @@ int signal_handle(int *end)
         /* Dispatch the signal to sub-handlers */
         switch(info.si_signo) {
             case SIGUSR1:
-                printf("Received SIGUSR1\n");
+                SIG_DEBUG("Received SIGUSR1\n");
                 *end = 1;
                 break;
 
             case SIGSEGV:   /* Fall through */
             case SIGABRT:
-                printf("Received SIGABORT\n");
+                SIG_DEBUG("Received SIGABORT\n");
                 backtrace_handle_signal(&info);
                 break;
 
             case SIGINT:
-                printf("Received SIGINT\n");
+                SIG_DEBUG("Received SIGINT\n");
                 itti_send_terminate_message(TASK_UNKNOWN);
                 *end = 1;
                 break;
 
             default:
-                printf("Received unknown signal %d\n", info.si_signo);
+                SIG_ERROR("Received unknown signal %d\n", info.si_signo);
                 break;
         }
     }

common/utils/itti/signals.h

 #ifndef SIGNALS_H_
 #define SIGNALS_H_
 
-int signal_init(void);
+int signal_mask(void);
 
 int signal_handle(int *end);
 

common/utils/itti/timer.c

@@ -85,7 +85,6 @@ do {                                                            \
 
 int timer_handle_signal(siginfo_t *info)
 {
-#if !defined(RTAI)
     struct timer_elm_s  *timer_p;
     MessageDef          *message_p;
     timer_has_expired_t *timer_expired_p;
@@ -127,7 +126,6 @@ int timer_handle_signal(siginfo_t *info)
         free(message_p);
         return -1;
     }
-#endif
 
     return 0;
 }
@@ -141,7 +139,6 @@ int timer_setup(
     void         *timer_arg,
     long         *timer_id)
 {
-#if !defined(RTAI)
     struct sigevent     se;
     struct itimerspec   its;
     struct timer_elm_s *timer_p;
@@ -209,9 +206,6 @@ int timer_setup(
     pthread_mutex_lock(&timer_desc.timer_list_mutex);
     STAILQ_INSERT_TAIL(&timer_desc.timer_queue, timer_p, entries);
     pthread_mutex_unlock(&timer_desc.timer_list_mutex);
-#else
-    return -1;
-#endif
 
     return 0;
 }
@@ -219,7 +213,6 @@ int timer_setup(
 int timer_remove(long timer_id)
 {
     int rc = 0;
-#if !defined(RTAI)
     struct timer_elm_s *timer_p;
 
     TMR_DEBUG("Removing timer 0x%lx\n", timer_id);
@@ -243,7 +236,6 @@ int timer_remove(long timer_id)
     }
     free(timer_p);
     timer_p = NULL;
-#endif
     return rc;
 }
 

common/utils/itti/timer.h

@@ -31,6 +31,8 @@
 #ifndef TIMER_H_
 #define TIMER_H_
 
+#include <signal.h>
+
 #define SIGTIMER SIGRTMIN
 
 typedef enum timer_type_s {
@@ -39,6 +41,8 @@ typedef enum timer_type_s {
     TIMER_TYPE_MAX,
 } timer_type_t;
 
+int timer_handle_signal(siginfo_t *info);
+
 /** \brief Request a new timer
  *  \param interval_sec timer interval in seconds
  *  \param interval_us  timer interval in micro seconds

openair2/ENB_APP/enb_app.c

@@ -215,7 +215,7 @@ void *eNB_app_task(void *args_p)
                         if (timer_setup (ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
                                          NULL, &enb_register_retry_timer_id) < 0)
                         {
-                            LOG_E(ENB_APP, " Can not start eNB register retry timer!\n");
+                            LOG_E(ENB_APP, " Can not start eNB register retry timer, use \"usleep\" instead!\n");
 
                             usleep(ENB_REGISTER_RETRY_DELAY * 1000000);
                             /* Restart the registration process */

openair2/UTIL/LOG/vcd_signal_dumper.c

@@ -51,6 +51,7 @@
 #include <unistd.h>
 #include <assert.h>
 
+#include "signals.h"
 #if defined(ENABLE_VCD_FIFO)
 # include "liblfds611.h"
 #endif
@@ -266,6 +267,10 @@ void *vcd_dumper_thread_rt(void *args)
     vcd_queue_user_data_t *data;
     char binary_string[(sizeof (uint64_t) * BYTE_SIZE) + 1];
 
+# if defined(ENABLE_ITTI)
+    signal_mask();
+# endif
+
     while(1) {
         if (lfds611_queue_dequeue(vcd_queue, (void **) &data) == 0) {
             /* No element -> sleep a while */
@@ -313,7 +318,6 @@ void *vcd_dumper_thread_rt(void *args)
 
 void vcd_signal_dumper_init(char *filename)
 {
-
     if (ouput_vcd) {
       //        char filename[] = "/tmp/openair_vcd_dump.vcd";
 

targets/RTAI/USER/Makefile

@@ -155,6 +155,9 @@ RTAI_CFLAGS += $(shell rtai-config --lxrt-cflags) -DRTAI
 LDFLAGS += -lpthread -lm -lforms
 ifeq ($(RTAI),1)
 LDFLAGS += $(shell rtai-config --lxrt-ldflags)
+ifdef ENABLE_ITTI
+LDFLAGS += -lrt
+endif
 else
 LDFLAGS += -lrt
 endif

targets/RTAI/USER/lte-softmodem.c

@@ -217,6 +217,7 @@ unsigned int build_rfdc(int dcoff_i_rxfe, int dcoff_q_rxfe)
     return (dcoff_i_rxfe + (dcoff_q_rxfe<<8));
 }
 
+#if !defined(ENABLE_ITTI)
 void signal_handler(int sig)
 {
   void *array[10];
@@ -235,6 +236,7 @@ void signal_handler(int sig)
     oai_exit=1;
   }
 }
+#endif
 
 void exit_fun(const char* s)
 {
@@ -480,17 +482,48 @@ void *l2l1_task(void *arg)
           free (message_p);
         }
         itti_receive_msg (TASK_L2L1, &message_p);
+
+        switch (ITTI_MSG_ID(message_p)) {
+          case INITIALIZE_MESSAGE:
+            /* Start eNB thread */
+            start_eNB = 1;
+            break;
+
+          case TERMINATE_MESSAGE:
+            oai_exit=1;
+            itti_exit_task ();
+            break;
+
+          default:
+            LOG_E(EMU, "Received unexpected message %s\n", ITTI_MSG_NAME(message_p));
+            break;
+        }
       } while (ITTI_MSG_ID(message_p) != INITIALIZE_MESSAGE);
       free (message_p);
-
-      /* Start eNB thread */
-      start_eNB = 1;
     }
 
-    while (!oai_exit)
-    {
-        usleep(500000);
-    }
+    do {
+      // Wait for a message
+      itti_receive_msg (TASK_L2L1, &message_p);
+
+      switch (ITTI_MSG_ID(message_p)) {
+        case TERMINATE_MESSAGE:
+          oai_exit=1;
+          itti_exit_task ();
+          break;
+
+        case MESSAGE_TEST:
+          LOG_I(EMU, "Received %s\n", ITTI_MSG_NAME(message_p));
+          break;
+
+        default:
+          LOG_E(EMU, "Received unexpected message %s\n", ITTI_MSG_NAME(message_p));
+          break;
+      }
+
+      free (message_p);
+    } while(1);
+
     return NULL;
 }
 #endif
@@ -1270,26 +1303,23 @@ int main(int argc, char **argv) {
   else {
     log_set_instance_type (LOG_INSTANCE_ENB);
   }
-#endif
 
-#if defined(ENABLE_ITTI)
   itti_init(TASK_MAX, THREAD_MAX, MESSAGES_ID_MAX, tasks_info, messages_info, messages_definition_xml, itti_dump_file);
 
   if (create_tasks(UE_flag ? 0 : 1, UE_flag ? 1 : 0) < 0) {
     exit(-1); // need a softer mode
   }
-
-  // Handle signals until all tasks are terminated
-//   itti_wait_tasks_end();
 #endif
 
 #ifdef NAS_NETLINK
   netlink_init();
 #endif
 
+#if !defined(ENABLE_ITTI)
   // to make a graceful exit when ctrl-c is pressed
   signal(SIGSEGV, signal_handler);
   signal(SIGINT, signal_handler);
+#endif
 
 #ifndef RTAI
   check_clock();
@@ -1463,11 +1493,15 @@ int main(int argc, char **argv) {
     g_log->log_component[OTG].flag  = LOG_HIGH;
     g_log->log_component[RRC].level = LOG_INFO;
     g_log->log_component[RRC].flag  = LOG_HIGH;
-#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
+#if defined(ENABLE_ITTI)
+    g_log->log_component[EMU].level = LOG_INFO;
+    g_log->log_component[EMU].flag  = LOG_HIGH;
+# if defined(ENABLE_USE_MME)
     g_log->log_component[S1AP].level  = LOG_INFO;
     g_log->log_component[S1AP].flag   = LOG_HIGH;
     g_log->log_component[SCTP].level  = LOG_INFO;
     g_log->log_component[SCTP].flag   = LOG_HIGH;
+# endif
 #endif
     g_log->log_component[ENB_APP].level = LOG_INFO;
     g_log->log_component[ENB_APP].flag  = LOG_HIGH;
@@ -1864,8 +1898,13 @@ int main(int argc, char **argv) {
   // wait for end of program
   printf("TYPE <CTRL-C> TO TERMINATE\n");
   //getchar();
+
+#if defined(ENABLE_ITTI)
+  itti_wait_tasks_end();
+#else
   while (oai_exit==0)
     rt_sleep_ns(FRAME_PERIOD);
+#endif
 
   // stop threads
 #ifdef XFORMS