HltEventLoopMgr: Add timing histogram for clearStore() calls

HLT/Trigger/TrigControl/TrigServices/python/TrigServicesConfig.py

@@ -156,6 +156,13 @@ class HltEventLoopMgr(_HltEventLoopMgr):
                                    title='Time between freeing and assigning a scheduler slot;Time [ms];Events',
                                    xbins=400, xmin=0, xmax=800, opt='kCanRebin')
 
+      self.MonTool.defineHistogram('TIME_clearStore', path='EXPERT', type='TH1F',
+                                   title='Time of clearStore() calls;Time [ms];Calls',
+                                   xbins=200, xmin=0, xmax=50)
+      self.MonTool.defineHistogram('TIME_clearStore;TIME_clearStore_extRange', path='EXPERT', type='TH1F',
+                                   title='Time of clearStore() calls;Time [ms];Calls',
+                                   xbins=200, xmin=0, xmax=200, opt='kCanRebin')
+
       from TrigSteerMonitor.TrigSteerMonitorConfig import getTrigErrorMonTool
       self.TrigErrorMonTool = getTrigErrorMonTool()
 

HLT/Trigger/TrigControl/TrigServices/src/HltEventLoopMgr.cxx

@@ -1392,7 +1392,9 @@ HltEventLoopMgr::DrainSchedulerStatusCode HltEventLoopMgr::drainScheduler()
 StatusCode HltEventLoopMgr::clearWBSlot(size_t evtSlot) const
 {
   ATH_MSG_VERBOSE("start of " << __FUNCTION__);
+  auto monTime = Monitored::Timer<std::chrono::duration<float, std::milli>>("TIME_clearStore");
   StatusCode sc = m_whiteboard->clearStore(evtSlot);
+  Monitored::Group(m_monTool, monTime);
   if( !sc.isSuccess() )  {
     ATH_MSG_WARNING("Clear of event data store failed");
   }