--- old/src/hotspot/share/prims/jvm.cpp	2020-02-26 11:26:24.760501800 +0100
+++ new/src/hotspot/share/prims/jvm.cpp	2020-02-26 11:26:23.541198500 +0100
@@ -486,6 +486,8 @@
 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
   JVMWrapper("JVM_GC");
   if (!DisableExplicitGC) {
+    EventSystemGC event;
+    event.commit();
     Universe::heap()->collect(GCCause::_java_lang_system_gc);
   }
 JVM_END