diff --git a/srsapps/radio/src/radio_uhd.cc b/srsapps/radio/src/radio_uhd.cc
index 9be56289a..399c84b0a 100644
--- a/srsapps/radio/src/radio_uhd.cc
+++ b/srsapps/radio/src/radio_uhd.cc
@@ -108,7 +108,7 @@ bool radio_uhd::tx(void* buffer, uint32_t nof_samples, srslte_timestamp_t tx_tim
   srslte_timestamp_add(&end_of_burst_time, 0, (double) nof_samples/cur_tx_srate); 
   
   save_trace(0, &tx_time);
-  if (cuhd_send_timed2(uhd, buffer, nof_samples, tx_time.full_secs, tx_time.frac_secs, true, false) > 0) {
+  if (cuhd_send_timed2(uhd, buffer, nof_samples, tx_time.full_secs, tx_time.frac_secs, false, false) > 0) {
     return true; 
   } else {
     return false; 
diff --git a/srsapps/ue/mac/src/mac.cc b/srsapps/ue/mac/src/mac.cc
index acbcb2a10..1078cf841 100644
--- a/srsapps/ue/mac/src/mac.cc
+++ b/srsapps/ue/mac/src/mac.cc
@@ -58,7 +58,7 @@ bool mac::init(phy *phy_h_, tti_sync* ttisync_, log* log_h_)
   sr_procedure.init(log_h, &params_db, phy_h);
   reset();
 
-  if (threads_new_rt(&mac_thread, mac_thread_fnc, this)) {
+  if (threads_new_rt_prio(&mac_thread, mac_thread_fnc, this, 5)) {
     started = true; 
   }
 
diff --git a/srslte/lib/cuhd/src/cuhd_imp.cpp b/srslte/lib/cuhd/src/cuhd_imp.cpp
index 00548bcc9..cb0f23765 100644
--- a/srslte/lib/cuhd/src/cuhd_imp.cpp
+++ b/srslte/lib/cuhd/src/cuhd_imp.cpp
@@ -162,7 +162,7 @@ int cuhd_open_(char *args, void **h, bool create_thread_gain, bool tx_gain_same_
 {
   cuhd_handler *handler = new cuhd_handler();
   std::string _args = std::string(args);
-  handler->usrp = uhd::usrp::multi_usrp::make(_args + ", master_clock_rate=30720000, num_recv_frames=64, num_send_frames=32");
+  handler->usrp = uhd::usrp::multi_usrp::make(_args + ", master_clock_rate=30720000, num_recv_frames=16, num_send_frames=16");
 
 //  handler->usrp = uhd::usrp::multi_usrp::make(_args + ", master_clock_rate=50000000" + ", num_recv_frames=512");
   handler->usrp->set_clock_source("internal");