addition of query of virtual timer frequency and computation of timing information for __aarch64__

openair1/PHY/TOOLS/time_meas.c

@@ -27,9 +27,10 @@
 // global var for openair performance profiler
 int opp_enabled = 0;
 
-
 double get_cpu_freq_GHz(void) {
 
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+
   time_stats_t ts = {0};
   reset_meas(&ts);
   ts.trials++;
@@ -39,6 +40,14 @@ double get_cpu_freq_GHz(void) {
   cpu_freq_GHz = (double)ts.diff/1000000000;
   printf("CPU Freq is %f \n", cpu_freq_GHz);
   return cpu_freq_GHz; 
+
+#elif defined (__aarch64__)
+  uint64_t cntfrq;
+  
+  asm volatile("mrs %0, cntfrq_el0" : "=r" (cntfrq));
+  return (double)cntfrq/1.0e9;
+
+#endif
 }
 
 void print_meas_now(time_stats_t *ts, const char* name, FILE* file_name){

openair1/SIMULATION/LTE_PHY/dlsim.c

@@ -659,7 +659,7 @@ int main(int argc, char **argv)
   Sched_Rsp_t sched_resp;
   int pa=dB0;
 
-#if defined(__arm__) || defined(__aarch64__)
+#if defined(__arm__) 
   FILE    *proc_fd = NULL;
   char buf[64];
 
@@ -2137,7 +2137,7 @@ int main(int argc, char **argv)
                                2)/eNB->phy_proc_tx.trials - pow((double)eNB->phy_proc_tx.diff/eNB->phy_proc_tx.trials/cpu_freq_GHz/1000,2));
         std_phy_proc_tx_ifft = sqrt((double)eNB->ofdm_mod_stats.diff_square/pow(cpu_freq_GHz,2)/pow(1000,
                                     2)/eNB->ofdm_mod_stats.trials - pow((double)eNB->ofdm_mod_stats.diff/eNB->ofdm_mod_stats.trials/cpu_freq_GHz/1000,2));
-        printf("OFDM_mod time                     :%f us (%d trials)\n",(double)eNB->ofdm_mod_stats.diff/eNB->ofdm_mod_stats.trials/cpu_freq_GHz/1000.0,eNB->ofdm_mod_stats.trials);
+        printf("OFDM_mod time                     :%f us/%lld cycles (%d trials)\n",(double)eNB->ofdm_mod_stats.diff/eNB->ofdm_mod_stats.trials/cpu_freq_GHz/1000.0,eNB->ofdm_mod_stats.diff/eNB->ofdm_mod_stats.trials,eNB->ofdm_mod_stats.trials);
         printf("|__ Statistcs                           std: %fus median %fus q1 %fus q3 %fus \n",std_phy_proc_tx_ifft, tx_ifft_median, tx_ifft_q1, tx_ifft_q3);
         printf("Total PHY proc tx                 :%f us (%d trials)\n",(double)eNB->phy_proc_tx.diff/eNB->phy_proc_tx.trials/cpu_freq_GHz/1000.0,eNB->phy_proc_tx.trials);
         printf("|__ Statistcs                           std: %fus max: %fus min: %fus median %fus q1 %fus q3 %fus n_dropped: %d packet \n",std_phy_proc_tx, t_tx_max, t_tx_min, tx_median, tx_q1, tx_q3,