Changed priorities to below UHD in srsUE

lib/include/srslte/common/metrics_hub.h

@@ -38,7 +38,8 @@ public:
   bool init(metrics_interface<metrics_t> *m_, float report_period_secs_=1.0) {
     m = m_;
     report_period_secs = report_period_secs_;
-    start_periodic(report_period_secs*1e6);
+    // Start with user-default priority
+    start_periodic(report_period_secs*1e6, -2);
     return true;
   }
   void stop() {

lib/include/srslte/common/threads.h

@@ -30,6 +30,9 @@
 #include <unistd.h>
 #include <stdio.h>
 
+// Default priority for all threads below UHD threads
+#define DEFAULT_PRIORITY 60
+
 #ifdef __cplusplus
     extern "C" {
 #endif // __cplusplus

lib/src/common/threads.c

@@ -67,6 +67,20 @@ bool threads_new_rt_cpu(pthread_t *thread, void *(*start_routine) (void*), void
       fprintf(stderr, "Error not enough privileges to set Scheduling priority\n");
     }
     attr_enable = true;
+  } else if (prio_offset == -1) {
+    param.sched_priority = sched_get_priority_max(SCHED_FIFO) - DEFAULT_PRIORITY;
+    pthread_attr_init(&attr);
+    if (pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED)) {
+      perror("pthread_attr_setinheritsched");
+    }
+    if (pthread_attr_setschedpolicy(&attr, SCHED_FIFO)) {
+      perror("pthread_attr_setschedpolicy");
+    }
+    if (pthread_attr_setschedparam(&attr, &param)) {
+      perror("pthread_attr_setschedparam");
+      fprintf(stderr, "Error not enough privileges to set Scheduling priority\n");
+    }
+    attr_enable = true;
   } else if (prio_offset == -2) {
     param.sched_priority = 0;
     pthread_attr_init(&attr);

lib/src/phy/rf/rf_uhd_imp.c

@@ -563,6 +563,9 @@ int rf_uhd_open_multi(char *args, void **h, uint32_t nof_channels)
       return -1; 
     }
 
+    /* Restore priorities  */
+    uhd_set_thread_priority(0, false);
+
     return 0;
   } else {
     return SRSLTE_ERROR_INVALID_INPUTS; 

srsue/hdr/mac/mac.h

@@ -112,8 +112,8 @@ public:
 private:  
   void run_thread(); 
   
-  static const int MAC_MAIN_THREAD_PRIO = 5; 
-  static const int MAC_PDU_THREAD_PRIO  = 6;
+  static const int MAC_MAIN_THREAD_PRIO = -1; // Use default high-priority below UHD
+  static const int MAC_PDU_THREAD_PRIO  = -1;
   static const int MAC_NOF_HARQ_PROC    = 2*HARQ_DELAY_MS;
 
   // Interaction with PHY