add tx thread

readme.txt

 BUILD:
 x86
-sudo gcc -o trx trx_test.c oxgrf_lib.c -march=native -loxgrf_ss -g
+sudo gcc -o trx system.c trx_test.c oxgrf_lib.c -march=native -loxgrf_ss -g -lpthread
 
 arm
 sudo gcc -o trx trx_test.c yunsdr_lib.c  -lyunsdr_ss -g

system.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/* This module provides a separate process to run system().
+ * The communication between this process and the main processing
+ * is done through unix pipes.
+ *
+ * Motivation: the UE sets its IP address using system() and
+ * that disrupts realtime processing in some cases. Having a
+ * separate process solves this problem.
+ */
+
+#define _GNU_SOURCE
+#include "system.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <pthread.h>
+#include "assertions.h"
+#define MAX_COMMAND 4096
+
+static int command_pipe_read;
+static int command_pipe_write;
+static int result_pipe_read;
+static int result_pipe_write;
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int module_initialized = 0;
+
+/********************************************************************/
+/* util functions                                                   */
+/********************************************************************/
+
+static void lock_system(void) {
+  if (pthread_mutex_lock(&lock) != 0) {
+    printf("pthread_mutex_lock fails\n");
+    abort();
+  }
+}
+
+static void unlock_system(void) {
+  if (pthread_mutex_unlock(&lock) != 0) {
+    printf("pthread_mutex_unlock fails\n");
+    abort();
+  }
+}
+
+static void write_pipe(int p, char *b, int size) {
+  while (size) {
+    int ret = write(p, b, size);
+
+    if (ret <= 0) exit(0);
+
+    b += ret;
+    size -= ret;
+  }
+}
+
+static void read_pipe(int p, char *b, int size) {
+  while (size) {
+    int ret = read(p, b, size);
+
+    if (ret <= 0) exit(0);
+
+    b += ret;
+    size -= ret;
+  }
+}
+int checkIfFedoraDistribution(void) {
+  return !system("grep -iq 'ID_LIKE.*fedora' /etc/os-release ");
+}
+
+int checkIfGenericKernelOnFedora(void) {
+  return system("uname -a | grep -q rt");
+}
+
+int checkIfInsideContainer(void) {
+  return !system("egrep -q 'libpod|podman|kubepods'  /proc/self/cgroup");
+}
+
+/********************************************************************/
+/* background process                                               */
+/********************************************************************/
+
+/* This function is run by background process. It waits for a command,
+ * runs it, and reports status back. It exits (in normal situations)
+ * when the main process exits, because then a "read" on the pipe
+ * will return 0, in which case "read_pipe" exits.
+ */
+static void background_system_process(void) {
+  int len;
+  int ret;
+  char command[MAX_COMMAND+1];
+
+  while (1) {
+    read_pipe(command_pipe_read, (char *)&len, sizeof(int));
+    read_pipe(command_pipe_read, command, len);
+    ret = system(command);
+    write_pipe(result_pipe_write, (char *)&ret, sizeof(int));
+  }
+}
+
+/********************************************************************/
+/* background_system()                                              */
+/*     return -1 on error, 0 on success                             */
+/********************************************************************/
+
+int background_system(char *command) {
+  int res;
+  int len;
+
+  if (module_initialized == 0) {
+    printf("FATAL: calling 'background_system' but 'start_background_system' was not called\n");
+    abort();
+  }
+
+  len = strlen(command)+1;
+
+  if (len > MAX_COMMAND) {
+    printf("FATAL: command too long. Increase MAX_COMMAND (%d).\n", MAX_COMMAND);
+    printf("command was: '%s'\n", command);
+    abort();
+  }
+
+  /* only one command can run at a time, so let's lock/unlock */
+  lock_system();
+  write_pipe(command_pipe_write, (char *)&len, sizeof(int));
+  write_pipe(command_pipe_write, command, len);
+  read_pipe(result_pipe_read, (char *)&res, sizeof(int));
+  unlock_system();
+
+  if (res == -1 || !WIFEXITED(res) || WEXITSTATUS(res) != 0) return -1;
+
+  return 0;
+}
+
+/********************************************************************/
+/* start_background_system()                                        */
+/*     initializes the "background system" module                   */
+/*     to be called very early by the main processing               */
+/********************************************************************/
+
+void start_background_system(void) {
+  int p[2];
+  pid_t son;
+
+  if (module_initialized == 1)
+    return;
+
+  module_initialized = 1;
+
+  if (pipe(p) == -1) {
+    perror("pipe");
+    exit(1);
+  }
+
+  command_pipe_read  = p[0];
+  command_pipe_write = p[1];
+
+  if (pipe(p) == -1) {
+    perror("pipe");
+    exit(1);
+  }
+
+  result_pipe_read  = p[0];
+  result_pipe_write = p[1];
+  son = fork();
+
+  if (son == -1) {
+    perror("fork");
+    exit(1);
+  }
+
+  if (son) {
+    close(result_pipe_write);
+    close(command_pipe_read);
+    return;
+  }
+
+  close(result_pipe_read);
+  close(command_pipe_write);
+  background_system_process();
+}
+
+int rt_sleep_ns (uint64_t x)
+{
+  struct timespec myTime;
+  clock_gettime(CLOCK_MONOTONIC, &myTime);
+  myTime.tv_sec += x/1000000000ULL;
+  myTime.tv_nsec = x%1000000000ULL;
+  if (myTime.tv_nsec>=1000000000) {
+    myTime.tv_nsec -= 1000000000;
+    myTime.tv_sec++;
+  }
+
+  return clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &myTime, NULL);
+}
+
+void threadCreate(pthread_t* t, void * (*func)(void*), void * param, char* name, int affinity, int priority){
+  pthread_attr_t attr;
+  int ret;
+  int settingPriority = 1;
+  ret=pthread_attr_init(&attr);
+  AssertFatal(ret==0,"ret: %d, errno: %d\n",ret, errno);
+  
+  if (checkIfFedoraDistribution())
+    if (checkIfGenericKernelOnFedora())
+      if (checkIfInsideContainer())
+        settingPriority = 0;
+  
+  if (settingPriority) {
+    ret=pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
+    AssertFatal(ret==0,"ret: %d, errno: %d\n",ret, errno);
+    ret=pthread_attr_setschedpolicy(&attr, SCHED_OAI);
+    AssertFatal(ret==0,"ret: %d, errno: %d\n",ret, errno);
+    if(priority<sched_get_priority_min(SCHED_OAI) || priority>sched_get_priority_max(SCHED_OAI)) {
+      printf("Prio not possible: %d, min is %d, max: %d, forced in the range\n",
+	    priority,
+	    sched_get_priority_min(SCHED_OAI),
+	    sched_get_priority_max(SCHED_OAI));
+      if(priority<sched_get_priority_min(SCHED_OAI))
+        priority=sched_get_priority_min(SCHED_OAI);
+      if(priority>sched_get_priority_max(SCHED_OAI))
+        priority=sched_get_priority_max(SCHED_OAI);
+    }
+    AssertFatal(priority<=sched_get_priority_max(SCHED_OAI),"");
+    struct sched_param sparam={0};
+    sparam.sched_priority = priority;
+    ret=pthread_attr_setschedparam(&attr, &sparam);
+    AssertFatal(ret==0,"ret: %d, errno: %d\n",ret, errno);
+  }
+  
+  ret=pthread_create(t, &attr, func, param);
+  AssertFatal(ret==0,"ret: %d, errno: %d\n",ret, errno);
+  
+  pthread_setname_np(*t, name);
+  if (affinity != -1 ) {
+    cpu_set_t cpuset;
+    CPU_ZERO(&cpuset);
+    CPU_SET(affinity, &cpuset);
+    AssertFatal( pthread_setaffinity_np(*t, sizeof(cpu_set_t), &cpuset) == 0, "Error setting processor affinity");
+  }
+  pthread_attr_destroy(&attr);
+}
+
+#if 0
+// Legacy, pthread_create + thread_top_init() should be replaced by threadCreate
+// threadCreate encapsulates the posix pthread api
+void thread_top_init(char *thread_name,
+		     int affinity,
+		     uint64_t runtime,
+		     uint64_t deadline,
+		     uint64_t period) {
+  
+  int policy, s, j;
+  struct sched_param sparam;
+  char cpu_affinity[1024];
+  cpu_set_t cpuset;
+  int settingPriority = 1;
+
+  /* Set affinity mask to include CPUs 2 to MAX_CPUS */
+  /* CPU 0 is reserved for UHD threads */
+  /* CPU 1 is reserved for all RX_TX threads */
+  /* Enable CPU Affinity only if number of CPUs > 2 */
+  CPU_ZERO(&cpuset);
+
+  /* Check the actual affinity mask assigned to the thread */
+  s = pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
+  if (s != 0)
+  {
+    perror( "pthread_getaffinity_np");
+    exit_fun("Error getting processor affinity ");
+  }
+  memset(cpu_affinity,0,sizeof(cpu_affinity));
+  for (j = 0; j < 1024; j++)
+  {
+    if (CPU_ISSET(j, &cpuset))
+    {  
+      char temp[1024];
+      sprintf (temp, " CPU_%d", j);
+      strcat(cpu_affinity, temp);
+    }
+  }
+
+  if (checkIfFedoraDistribution())
+    if (checkIfGenericKernelOnFedora())
+      if (checkIfInsideContainer())
+        settingPriority = 0;
+
+  if (settingPriority) {
+    memset(&sparam, 0, sizeof(sparam));
+    sparam.sched_priority = sched_get_priority_max(SCHED_FIFO);
+    policy = SCHED_FIFO;
+  
+    s = pthread_setschedparam(pthread_self(), policy, &sparam);
+    if (s != 0) {
+      perror("pthread_setschedparam : ");
+      exit_fun("Error setting thread priority");
+    }
+  
+    s = pthread_getschedparam(pthread_self(), &policy, &sparam);
+    if (s != 0) {
+      perror("pthread_getschedparam : ");
+      exit_fun("Error getting thread priority");
+    }
+
+    pthread_setname_np(pthread_self(), thread_name);
+
+    LOG_I(HW, "[SCHED][eNB] %s started on CPU %d, sched_policy = %s , priority = %d, CPU Affinity=%s \n",thread_name,sched_getcpu(),
+                     (policy == SCHED_FIFO)  ? "SCHED_FIFO" :
+                     (policy == SCHED_RR)    ? "SCHED_RR" :
+                     (policy == SCHED_OTHER) ? "SCHED_OTHER" :
+                     "???",
+                     sparam.sched_priority, cpu_affinity );
+  }
+}
+
+
+// Block CPU C-states deep sleep
+void set_latency_target(void) {
+  int ret;
+  static int latency_target_fd=-1;
+  uint32_t latency_target_value=2; // in microseconds
+  if (latency_target_fd == -1) {
+    if ( (latency_target_fd = open("/dev/cpu_dma_latency", O_RDWR)) != -1 ) {
+      ret = write(latency_target_fd, &latency_target_value, sizeof(latency_target_value));
+      if (ret == 0) {
+	printf("# error setting cpu_dma_latency to %u!: %s\n", latency_target_value, strerror(errno));
+	close(latency_target_fd);
+	latency_target_fd=-1;
+	return;
+      }
+    }
+  }
+  if (latency_target_fd != -1) 
+    LOG_I(HW,"# /dev/cpu_dma_latency set to %u us\n", latency_target_value);
+  else
+    LOG_E(HW,"Can't set /dev/cpu_dma_latency to %u us\n", latency_target_value);
+
+  // Set CPU frequency to it's maximum
+  if ( 0 != system("for d in /sys/devices/system/cpu/cpu[0-9]*; do cat $d/cpufreq/cpuinfo_max_freq > $d/cpufreq/scaling_min_freq; done"))
+	  LOG_E(HW,"Can't set cpu frequency\n");
+
+  mlockall(MCL_CURRENT | MCL_FUTURE);
+
+}
+#endif
\ No newline at end of file

system.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef _SYSTEM_H_OAI_
+#define _SYSTEM_H_OAI_
+#include <stdint.h>
+#include <pthread.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/****************************************************
+ * send a command to the background process
+ *     return -1 on error, 0 on success
+ ****************************************************/
+
+int background_system(char *command);
+
+/****************************************************
+ * initialize the background process
+ *     to be called very early
+ ****************************************************/
+
+void start_background_system(void);
+
+void set_latency_target(void);
+
+void threadCreate(pthread_t *t, void *(*func)(void *), void *param, char *name, int affinity, int priority);
+
+#define SCHED_OAI SCHED_RR
+#define OAI_PRIORITY_RT_LOW sched_get_priority_min(SCHED_OAI)
+#define OAI_PRIORITY_RT ((sched_get_priority_min(SCHED_OAI)+sched_get_priority_max(SCHED_OAI))/2)
+#define OAI_PRIORITY_RT_MAX sched_get_priority_max(SCHED_OAI)-2
+
+void thread_top_init(char *thread_name,
+                     int affinity,
+                     uint64_t runtime,
+                     uint64_t deadline,
+                     uint64_t period);
+
+/****************************************************
+ * Functions to check system at runtime.
+ ****************************************************/
+
+int checkIfFedoraDistribution(void);
+int checkIfGenericKernelOnFedora(void);
+int checkIfInsideContainer(void);
+int rt_sleep_ns (uint64_t x);
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _SYSTEM_H_OAI_ */

trx_test.c

@@ -3,12 +3,17 @@
 #include <assert.h>
 
 #include "trx_test.h"
+#include "system.h"
+#include <semaphore.h>
+#include <pthread.h>
 
+#define NB_ANTENNAS_RX 4
+#define NB_ANTENNAS_TX 1
 
-#define NB_ANTENNAS_RX 1
-#define NB_ANTENNAS_TX 4
 #define SAMPLE_RATE    (122880000)
 
+//#define TX_RX_ONE_THREAD
+
 int txdata_size=61440*4;
 int rxdata_size=61440*4;
 int absolute_slot=0;
@@ -40,9 +45,61 @@ struct timespec  nr_get_timespec_diff(
  return result;
 }
 
+openair0_timestamp rx_timestamp, writeTimestamp;
+int32_t * rxp[NB_ANTENNAS_RX];
+int32_t * txp[NB_ANTENNAS_TX];
+int readBlockSize, writeBlockSize;
+int tx_cnt = 0;
+int rx_cnt = 0;
+sem_t ric_send_sem;
+double clock_gettime_cur_tx;
+
+static void *tx_thread(void *param)
+{
+  openair0_device *rfdevice = (openair0_device *) param;
+  double clock_gettime_cur;
+  struct timespec time_start;
+  struct timespec time_stop;
+
+  while (1) {
+
+    sem_wait (&ric_send_sem);
+    //printf("00000000 tx cnt %d rx cnt %d\n", tx_cnt, rx_cnt);
+    // use previous timing_advance value to compute writeTimestamp
+    //writeTimestamp = timestamp+samples_per_subframe/20*5;// sent after 5 slot.
+    writeTimestamp = rx_timestamp+samples_per_subframe/4;// sent after 5 slot.
+
+    // but use current UE->timing_advance value to compute writeBlockSize
+  
+    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, VCD_FUNCTION_IN );
+    clock_gettime(CLOCK_REALTIME,&time_start);
+    #if 1
+    rfdevice->trx_write_func(rfdevice,
+                                              writeTimestamp,
+                                              (void **)txp,
+                                              writeBlockSize,
+                                              1,
+                                              1);
+    #endif                                          
+    clock_gettime(CLOCK_REALTIME,&time_stop ); 
+    clock_gettime_cur_tx = NR_TIMESPEC_TO_DOUBLE_US( nr_get_timespec_diff( &time_start, &time_stop ));                                         
+    tx_cnt++;
+    //printf("11111111 tx cnt %d rx cnt %d\n", tx_cnt, rx_cnt);
+    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, VCD_FUNCTION_OUT );
+ 
+
+
+  }
+
+  return NULL;
+}
+
+
+
 int main( int argc, char **argv ) {
 
 
+ pthread_t tx_threads;
 
 //  test_t *t1=malloc(sizeof(test_t));
   test_t t2[4];
@@ -55,7 +112,7 @@ int main( int argc, char **argv ) {
   sched_setscheduler(getpid(), SCHED_RR, &rr_param);
   cpu_set_t mask;
   CPU_ZERO(&mask);
-  CPU_SET(5, &mask);
+  CPU_SET(20, &mask);
   int rc = sched_setaffinity(getpid(), sizeof(mask), &mask);
   assert(rc >= 0);
 
@@ -118,16 +175,19 @@ int main( int argc, char **argv ) {
 
   openair0_cfg[card].sdr_addrs = "dev=pciex:0,auxdac1=300";
 
-  openair0_timestamp timestamp, timestampold, writeTimestamp;
-  int32_t * rxp[NB_ANTENNAS_RX];
-  int32_t * txp[NB_ANTENNAS_TX];
+  openair0_timestamp timestampold ;
+
   int start_rx_stream = 1;
 
   double clock_gettime_cur;
-  struct timespec time_start;
-  struct timespec time_stop;
-
+  struct timespec time_start, time_start1;
+  struct timespec time_stop, time_stop1;
 
+  int res = sem_init(&ric_send_sem, 0, 0);  
+  if (res != 0)  
+  {  
+  perror("Semaphore initialization failed");  
+  }  
 
 
 
@@ -137,7 +197,7 @@ int main( int argc, char **argv ) {
   for (int i=0; i<NB_ANTENNAS_TX; i++) {
     txp[i] = (int32_t *) malloc16_clear( txdata_size );
   }
-    int readBlockSize, writeBlockSize;
+  
 
   readBlockSize = samples_per_subframe/2;
   writeBlockSize = readBlockSize;
@@ -145,17 +205,18 @@ int main( int argc, char **argv ) {
   device_init(&(rfdevice), &openair0_cfg[0]);
 
 
+  threadCreate(&tx_threads, tx_thread, &rfdevice, "tx_thread", 21, sched_get_priority_max(SCHED_RR)-2);
   rfdevice.trx_start_func(&rfdevice);
 
 //first time is very long, don't know why.
   clock_gettime(CLOCK_REALTIME,&time_start);
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, VCD_FUNCTION_IN );
   rfdevice.trx_read_func(&rfdevice,
-                                          &timestamp,
+                                          &rx_timestamp,
                                           (void **)rxp,
                                           readBlockSize,
                                           1);
-  timestampold = timestamp;
+  timestampold = rx_timestamp;
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, VCD_FUNCTION_OUT );
   clock_gettime(CLOCK_REALTIME,&time_stop);
   clock_gettime_cur = NR_TIMESPEC_TO_DOUBLE_US( nr_get_timespec_diff( &time_start, &time_stop ));//us
@@ -167,39 +228,46 @@ int main( int argc, char **argv ) {
     clock_gettime(CLOCK_REALTIME,&time_stop);
 
     clock_gettime_cur = NR_TIMESPEC_TO_DOUBLE_US( nr_get_timespec_diff( &time_start, &time_stop ));//us
-    if (clock_gettime_cur > 510) 
-         printf("slot_num %d, timestamp %ld, writeTimestamp %ld,time = %.2f sec, delay_time=%.2lf msec. readBlockSize %d. real read %ld.\n",
-          absolute_slot, timestamp,  writeTimestamp, ((float)absolute_slot)/2/1000, clock_gettime_cur/1000,readBlockSize,(timestamp - timestampold));
+    if ((clock_gettime_cur > 300) || (clock_gettime_cur_tx > 510))
+         printf("slot_num %d, timestamp %ld, writeTimestamp %ld,time = %.2f sec, delay_time=(%.2lf, %d) (tx %.2lf, %d)msec. readBlockSize %d. real read %ld.\n",
+          absolute_slot, rx_timestamp,  writeTimestamp, ((float)absolute_slot)/2/1000, clock_gettime_cur/1000,rx_cnt, clock_gettime_cur_tx/1000, tx_cnt, readBlockSize,(rx_timestamp - timestampold));
     clock_gettime(CLOCK_REALTIME,&time_start);
-    timestampold = timestamp;
+    timestampold = rx_timestamp;
 
 #if 1
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, VCD_FUNCTION_IN );
     rfdevice.trx_read_func(&rfdevice,
-                                           &timestamp,
+                                           &rx_timestamp,
                                            (void **)rxp,
                                            readBlockSize,
                                            1);
+    rx_cnt++;
+
  
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, VCD_FUNCTION_OUT );
 #endif
 
-#if 1
+#ifdef TX_RX_ONE_THREAD
     // use previous timing_advance value to compute writeTimestamp
     //writeTimestamp = timestamp+samples_per_subframe/20*5;// sent after 5 slot.
-    writeTimestamp += timestamp+samples_per_subframe/2;// sent after 5 slot.
+    writeTimestamp = rx_timestamp+samples_per_subframe/4;// sent after 5 slot.
 
     // but use current UE->timing_advance value to compute writeBlockSize
   
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, VCD_FUNCTION_IN );
+    clock_gettime(CLOCK_REALTIME,&time_start1 ); 
     rfdevice.trx_write_func(&rfdevice,
                                               writeTimestamp,
                                               (void **)txp,
                                               writeBlockSize,
                                               1,
                                               1);
+    clock_gettime(CLOCK_REALTIME,&time_stop1 ); 
+    clock_gettime_cur_tx = NR_TIMESPEC_TO_DOUBLE_US( nr_get_timespec_diff( &time_start1, &time_stop1 ));  
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, VCD_FUNCTION_OUT );
-  #endif  
+#else
+    sem_post(&ric_send_sem); 
+#endif  
 } // while !oai_exit
 
   return 0;