diff -r f519a9c26daf src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	Thu May 14 14:36:45 2020 -0400
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	Fri May 15 15:04:16 2020 +0200
@@ -1830,19 +1830,21 @@
 
 void ShenandoahHeap::op_weak_roots() {
   if (is_concurrent_weak_root_in_progress()) {
     {
       // Concurrent weak root processing
-      ShenandoahConcurrentWeakRootsEvacUpdateTask task(ShenandoahPhaseTimings::conc_weak_roots);
+      ShenandoahGCWorkerPhase worker_phase(ShenandoahPhaseTimings::conc_weak_roots_work);
+      ShenandoahConcurrentWeakRootsEvacUpdateTask task(ShenandoahPhaseTimings::conc_weak_roots_work);
       workers()->run_task(&task);
       if (!ShenandoahConcurrentRoots::should_do_concurrent_class_unloading()) {
         set_concurrent_weak_root_in_progress(false);
       }
     }
 
-    // perform handshake to flush out dead oops.
+    // Perform handshake to flush out dead oops
     {
+      ShenandoahTimingsTracker t(ShenandoahPhaseTimings::conc_weak_roots_rendezvous);
       ShenandoahRendezvousClosure cl;
       Handshake::execute(&cl);
     }
   }
 }
@@ -2872,12 +2874,10 @@
 void ShenandoahHeap::entry_weak_roots() {
   static const char* msg = "Concurrent weak roots";
   ShenandoahConcurrentPhase gc_phase(msg, ShenandoahPhaseTimings::conc_weak_roots);
   EventMark em("%s", msg);
 
-  ShenandoahGCWorkerPhase worker_phase(ShenandoahPhaseTimings::conc_weak_roots);
-
   ShenandoahWorkerScope scope(workers(),
                               ShenandoahWorkerPolicy::calc_workers_for_conc_root_processing(),
                               "concurrent weak root");
 
   try_inject_alloc_failure();
diff -r f519a9c26daf src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.cpp	Thu May 14 14:36:45 2020 -0400
+++ b/src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.cpp	Fri May 15 15:04:16 2020 +0200
@@ -105,11 +105,11 @@
     case full_gc_purge_class_unload:
     case full_gc_purge_weak_par:
     case purge_class_unload:
     case purge_weak_par:
     case heap_iteration_roots:
-    case conc_weak_roots:
+    case conc_weak_roots_work:
     case conc_strong_roots:
       return true;
     default:
       return false;
   }
diff -r f519a9c26daf src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp	Thu May 14 14:36:45 2020 -0400
+++ b/src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp	Fri May 15 15:04:16 2020 +0200
@@ -89,11 +89,13 @@
   f(final_rebuild_freeset,                          "  Rebuild Free Set")              \
   f(init_evac,                                      "  Initial Evacuation")            \
   SHENANDOAH_PAR_PHASE_DO(evac_,                    "    E: ", f)                      \
                                                                                        \
   f(conc_weak_roots,                                "Concurrent Weak Roots")           \
-  SHENANDOAH_PAR_PHASE_DO(conc_weak_roots_,         "  CWR: ", f)                      \
+  f(conc_weak_roots_work,                           "  Roots")                         \
+  SHENANDOAH_PAR_PHASE_DO(conc_weak_roots_work_,    "    CWR: ", f)                    \
+  f(conc_weak_roots_rendezvous,                     "  Rendezvous")                    \
   f(conc_cleanup_early,                             "Concurrent Cleanup")              \
   f(conc_class_unload,                              "Concurrent Class Unloading")      \
   f(conc_class_unload_unlink,                       "  Unlink Stale")                  \
   f(conc_class_unload_unlink_sd,                    "    System Dictionary")           \
   f(conc_class_unload_unlink_weak_klass,            "    Weak Class Links")            \