Also adjust the event handler's timer_fd to the monotonic clock.

runtime/bin/eventhandler_linux.cc

Index: runtime/bin/eventhandler_linux.cc
diff --git a/runtime/bin/eventhandler_linux.cc b/runtime/bin/eventhandler_linux.cc
index f28481f70daf280741dae324d887b8c4ad89d5d1..4c605ce060ea9e5797f35f0d1f5a395787a36b0e 100644
--- a/runtime/bin/eventhandler_linux.cc
+++ b/runtime/bin/eventhandler_linux.cc
@@ -109,7 +109,7 @@ EventHandlerImplementation::EventHandlerImplementation()
   if (status == -1) {
     FATAL("Failed adding interrupt fd to epoll instance");
   }
-  timer_fd_ = NO_RETRY_EXPECTED(timerfd_create(CLOCK_REALTIME, TFD_CLOEXEC));
+  timer_fd_ = NO_RETRY_EXPECTED(timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC));
   if (timer_fd_ == -1) {
     FATAL1("Failed creating timerfd file descriptor: %i", errno);
   }