diff --git a/doc/rt/reports/benchmarks/rt-stm32g4-170mhz-gcc.txt b/doc/rt/reports/benchmarks/rt-stm32g4-170mhz-gcc.txt
index 529b752a6..656dc4592 100644
--- a/doc/rt/reports/benchmarks/rt-stm32g4-170mhz-gcc.txt
+++ b/doc/rt/reports/benchmarks/rt-stm32g4-170mhz-gcc.txt
@@ -1,11 +1,11 @@
 
 *** ChibiOS/RT Test Suite
 ***
-*** Compiled:     Jun 11 2021 - 13:55:11
+*** Compiled:     Jun 12 2021 - 07:55:58
 *** Platform:     STM32G4 Hi-resolution Line
 *** Test Board:   STMicroelectronics STM32 Nucleo64-G474RE
 ***
-*** Text size:    51060 bytes
+*** Text size:    51108 bytes
 *** RO data size: 9904 bytes
 *** Data size:    220 bytes
 *** BSS size:     5400 bytes
@@ -205,11 +205,11 @@
 --- Result: SUCCESS
 ----------------------------------------------------------------------------
 --- Test Case 12.5 (Threads performance, full cycle)
---- Score : 518288 threads/S
+--- Score : 521467 threads/S
 --- Result: SUCCESS
 ----------------------------------------------------------------------------
 --- Test Case 12.6 (Threads performance, create/exit only)
---- Score : 643936 threads/S
+--- Score : 653843 threads/S
 --- Result: SUCCESS
 ----------------------------------------------------------------------------
 --- Test Case 12.7 (Mass reschedule performance)
@@ -249,11 +249,11 @@ Final result: SUCCESS
 
 *** ChibiOS OS Library Test Suite
 ***
-*** Compiled:     Jun 11 2021 - 13:55:11
+*** Compiled:     Jun 12 2021 - 07:55:58
 *** Platform:     STM32G4 Hi-resolution Line
 *** Test Board:   STMicroelectronics STM32 Nucleo64-G474RE
 ***
-*** Text size:    51060 bytes
+*** Text size:    51108 bytes
 *** RO data size: 9904 bytes
 *** Data size:    220 bytes
 *** BSS size:     5400 bytes
diff --git a/os/rt/src/chsem.c b/os/rt/src/chsem.c
index bc032305d..51073fe89 100644
--- a/os/rt/src/chsem.c
+++ b/os/rt/src/chsem.c
@@ -265,7 +265,7 @@ msg_t chSemWaitTimeoutS(semaphore_t *sp, sysinterval_t timeout) {
               "inconsistent semaphore");
 
   if (--sp->cnt < (cnt_t)0) {
-    if (TIME_IMMEDIATE == timeout) {
+    if (unlikely(TIME_IMMEDIATE == timeout)) {
       sp->cnt++;
 
       return MSG_TIMEOUT;
diff --git a/os/rt/src/chthreads.c b/os/rt/src/chthreads.c
index 9afcc5abb..c4d44da15 100644
--- a/os/rt/src/chthreads.c
+++ b/os/rt/src/chthreads.c
@@ -520,7 +520,7 @@ void chThdExitS(msg_t msg) {
 
 #if CH_CFG_USE_WAITEXIT == TRUE
   /* Waking up any waiting thread.*/
-  while (ch_list_notempty(&currtp->waiting)) {
+  while (unlikely(ch_list_notempty(&currtp->waiting))) {
     (void) chSchReadyI((thread_t *)ch_list_unlink(&currtp->waiting));
   }
 #endif
diff --git a/os/rt/src/chvt.c b/os/rt/src/chvt.c
index 01db1bb45..5e277685a 100644
--- a/os/rt/src/chvt.c
+++ b/os/rt/src/chvt.c
@@ -445,7 +445,7 @@ void chVTDoTickI(void) {
     chSysLockFromISR();
 
     /* If a reload is defined the timer needs to be restarted.*/
-    if (vtp->reload > (sysinterval_t)0) {
+    if (unlikely(vtp->reload > (sysinterval_t)0)) {
       sysinterval_t delay;
 
       /* Refreshing the current time after spending time in the callback for