Level 2 Status and Outlook Ali Hanks Run 7 DAQ Fest Oct. 18, 2006

10/18/06DAQ Fest - Lvl21 Outline Review: –Making configurations –Monitoring level 2 filtering Problems to solve: –Remaining bugs –Lvl2 - buffer box stream configs made seperately –No reliable record of configuration kept –Lvl2 stats not automatically recorded

10/18/06DAQ Fest - Lvl22 Creating/Editing lvl2 Configurations Lvl2 version attached to lvl1 version –Downloaded to disk with GL1 configuration –EvBServer uses Lvl2Control lib to read and send to ATPs Can use to add existing lvl2 to new lvl1 version or modify lvl2 There is a special option to add new output streams

10/18/06DAQ Fest - Lvl23 Configuring Bits and Algorithms Available bits are determined by the lvl1 version selected All available algorithms can be enabled or disabled for each enabled bit

10/18/06DAQ Fest - Lvl24 Level 2 Monitoring Lvl2Mon: originally written by GSU Monitors Lvl1 and Lvl2 trigger decisions Powerfull diagnostic tool: mostly used by experts during last run May be useful as part of online monitoring Was used for writing lvl2 stats to an ascii file

10/18/06DAQ Fest - Lvl25 Remaining Issues for Lvl2 A few known bugs to be fixed –If forced accept  0 it overrides disabled mode for bits –Occasionally new configurations would not get written properly to db - not clear why –Seems too easy to make a mistake and mess up the db so it can’t be fixed without direct intervention Streams used for filtering must agree in lvl2 and buffer box configurations –Currently this requires expert intervention, not ideal –Lots of instances when lvl2 was turned off but the buffer boxes were still writing scalars to the lvl2 streams –Possible solution is a buffer box gui connected to lvl2 config gui

10/18/06DAQ Fest - Lvl26 Remaining Issues (cont’d) Under certain conditions, new lvl1 configurations can be missing a lvl2 configuration - havoc ensues –Need tighter integration of two configurations Currently a pointer to the Lvl2Config db entry is entered in the runcontrol db –Actual configuration should be entered to guard against erroneous db changes after the fact Lvl2 statistics are recorded only as ASCII files (by Lvl2Monitor), as an expert (or DO) action –Need to automate this if we want a reliable db-based record

10/18/06DAQ Fest - Lvl27 Lvl2 Rates Algorithm run time not a problem for pp but could be for Au-Au –Multithreading works well, could it be further optimized? –More ATPs are available –Some algorithms may have room for improvement in efficiency