[TD-2875]<fix>: use monotonic clock source to fix leap-second issue

src/util/CMakeLists.txt

@@ -3,9 +3,10 @@ PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/rpc/inc)
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/sync/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/rmonotonic/inc)
 AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(tutil ${SRC})
-TARGET_LINK_LIBRARIES(tutil pthread osdetail lz4 z)
+TARGET_LINK_LIBRARIES(tutil pthread osdetail lz4 z rmonotonic)
 
 IF (TD_LINUX)
   TARGET_LINK_LIBRARIES(tutil m rt)

src/util/src/ttimer.c

@@ -18,6 +18,7 @@
 #include "tsched.h"
 #include "ttimer.h"
 #include "tutil.h"
+#include "monotonic.h"
 
 extern int8_t tscEmbedded;
 
@@ -186,6 +187,10 @@ static void removeTimer(uintptr_t id) {
   unlockTimerList(list);
 }
 
+static int64_t getMonotonicMs(void) {
+  return (int64_t) getMonotonicUs() / 1000;
+}
+
 static void addToWheel(tmr_obj_t* timer, uint32_t delay) {
   timerAddRef(timer);
   // select a wheel for the timer, we are not an accurate timer,
@@ -201,7 +206,7 @@ static void addToWheel(tmr_obj_t* timer, uint32_t delay) {
 
   time_wheel_t* wheel = wheels + timer->wheel;
   timer->prev = NULL;
-  timer->expireAt = taosGetTimestampMs() + delay;
+  timer->expireAt = getMonotonicMs() + delay;
 
   pthread_mutex_lock(&wheel->mutex);
 
@@ -334,7 +339,7 @@ tmr_h taosTmrStart(TAOS_TMR_CALLBACK fp, int mseconds, void* param, void* handle
 }
 
 static void taosTimerLoopFunc(int signo) {
-  int64_t now = taosGetTimestampMs();
+  int64_t now = getMonotonicMs();
 
   for (int i = 0; i < tListLen(wheels); i++) {
     // `expried` is a temporary expire list.
@@ -501,7 +506,8 @@ static void taosTmrModuleInit(void) {
 
   pthread_mutex_init(&tmrCtrlMutex, NULL);
 
-  int64_t now = taosGetTimestampMs();
+  tmrInfo("ttimer monotonic clock source:%s", monotonicInit());
+  int64_t now = getMonotonicMs();
   for (int i = 0; i < tListLen(wheels); i++) {
     time_wheel_t* wheel = wheels + i;
     if (pthread_mutex_init(&wheel->mutex, NULL) != 0) {