diff -r c97db0855565 -r 758c07667682 src/share/vm/runtime/safepoint.cpp
--- a/src/share/vm/runtime/safepoint.cpp	Tue Feb 04 17:38:01 2020 +0800
+++ b/src/share/vm/runtime/safepoint.cpp	Tue Feb 04 18:13:14 2020 +0800
@@ -547,6 +547,7 @@
 
   // rotate log files?
   if (UseGCLogFileRotation) {
+    TraceTime t8("rotating gc logs", TraceSafepointCleanupTime);
     gclog_or_tty->rotate_log(false);
   }