1. Trigger Table Improvements -- past, present and future prospects Kirsten & Ted, Feb.02, 2006, CDF meeting Happy Chinese/Korea New Year! Year of dog… When it comes to trigger, stay low (in rate) !. Photo taken by Ted: Party @Y2K’s mansion, Jan.29

2. One year of bandwidth improvements L1A bandwidth improvements (many heros) L2 Pulsar upgrade, followed by PulsarII with Filar (from March, 2005) SVT AMSRW/HF++ upgrade (Summer 2005) improved L1A bandwidth above 30KHz SVT HB++ is almost there (more improvement!) Silicon L1A limit increased from 30KHz to 40KHz (Sebastian) (Nov. 2005) L2A bandwidth improvements (Markus !) EVB upgrade, improved from ~370Hz to ~800! (Aug. 2005) L3 upgrade, more than double the CPU processing power! (on going!) XFT upgrade is on going! (crucial to get us to 300E30) CSL/Raw data logger upgrade is coming… overall throughput to tape from current ~20MB/s to ~80MB/s “Almost to the impossibly ambitious original L1A spec,and well past the original L2/L3 rates”. -- Jim Patrick’s comment on Jan 13, 2006. Always keep in mind!: Real goal is to improve bandwidth at the “system level”: from Collision point --> Detector/L1/L2/L3/csl/tapes/disk/ntuples/users/mtgs/GP…. --> Phys.Rev. editor’s desk!

3. One year of Trigger Table Performance Improvements Timeline Feb. 2005: 3_00_v3 (default & highlumi) Mar. 2005: 3_01_v1 (version for L2 Pulsar driving) April 2005: 3_02_v1 (1st attempt at ROF at L2) July 2005: 3_04_v1 (really removed ROF at L2) Aug. 2005: 3_05_v1 (XTRP firmware change, Mt) Aug. 2005: 3_06_v1 (A Major clean up of tables) Aug. 2005: 3_07_v1 (1st attempt at unification) Jan. 2006: 3_09_v1 (1st GUT table in action) For details, see TDWG meeting talks between June-Sept 2005, and Jan. 2006.

4. The goal of GUT table is to get rid of HIGHLUMI table, to allow most triggers run into higher luminosity… The following datasets are not in the highlumi table, and now they are running at higher luminosity in the GUT table… B_BACKUP B_ELECTRON B_HADRONIC B_MUON B_PIPI DIFFRACTIVE HIGGS_MULTI_JET HIGH_PT_BJET JET_20_CENTRAL JPSIEE Z_BB About ~ 60 triggers at L2

5. One year (2005) of Trigger Table Performance with beam Luminosity (E30) 90 100 130 170 200 highlumi 3_09 3_07 3_06 3_02 Major clean up 1st GUT (Grand Unification Table) default ~10% DT, limited by L1A limited by L1A limited by L2A 1st attempt at unification

6. Initial look at GUT 3_09_v1 performance: L1 & deadtime Default 3_07 HIGHLUMI Take advantage of: Silicon L1A limit increased by Sebastian L2/SVT/EVB/L3 improvements Details see: TDWG web talks on Jan06 & Jan.20th Z_to_BBbar enabled ScenC_CLCM enabled ScenA_UPS enabled High luminsity store 4590 Taken Jan. 13, 2006

7. Initial look at GUT 3_09_v1 performance: L2 As expected, GUT 3_09_v1 performance is limited by initial L2A rate, ~600Hz @165E30… The “wall” is around ~700-800 Hz at higher luminosity…. Need to control the initial L2A rate !

8. MET25+2JETs L2_CMX6_PT15 Some good triggers “gone wild” at L2 rate x-sec

9. Initial look at GUT 3_09_v1 performance: L3&CSL output We are now writing more data to tape… E-log entry: -- Fri Jan 13 17:52:15: The CSL rate to disk is higher than previously seen and the tape writing rate is ~ 8-16 MB/s (24 MB/s maximum rate). It looks as though we can likely write data to tape fast enough for now, but it will be close. Doug Benjamin and Krzysztof Genser This is a good problem to have ….

10. We have learned a great deal from the GUT 3_09_v1 Run 210008 The GUT table performance will be limited by initial max L2A (~800Hz) Just because your triggers are in RunIIb list, doesn’t mean you can relax! Some of them could “gone wild” at higher luminosity … The extrapolations in your study could have limitations … Some backup triggers could “gone really wild” as well ! Think harder and study harder during shutdown Hope/beg for another new record store before shutdown to learn more! For details, see TDWG meeting web talk on Jan20, 2006, or directly: http://hep.uchicago.edu/~thliu/projects/TDWG/TDWG_Jan20_06.pdf

11. RunIIb Physics Priorities and Trigger Committee Lots of good work done by many (led by Luciano) ! TDWG takes the recommendations very seriously CDFnote 8055

12. RunIIb Physics Priorities and Trigger Committee -- “zoom in” view (any familiar faces?) Essences of RunIIb Report: A list of “ Most Important Triggers (MIT)” Specific recommendations on threshold changes etc for some MITs RunIIb officially starts from this report ! 2b or not 2b? no longer the question!

13. Is RunIIb for b physics too? -- B group’s trigger plan B group is making rapid progress on finalizing their plan (not covered in the RunIIb report) --> Led by Kevin CDF note is in progress… Details see Kevin’s talk at TDWG meeting on Jan. 20, 2006 http://www-cdf.fnal.gov/internal/WebTalks/Archive/0601/060120_tdwg/ 04_060120_tdwg_Kevin_1_B_plan_tdwg.pdf Will try our best to implement some of their plan before shutdown….

14. Goal Setting Spokes ask us to jump, we say “how high?”… The goal is to reach 300E30 with one table, while optimizing the middle&low ranges … Have done reasonably well in the past year towards this goal … Still a long way to go … 300E30 TDWG

15. How to get there from here? -- learn from the past Table clean up: need to do more “Prescale away” more&more triggers (not in RunIIb list) at higher&higher luminosity … need to do more Improve trigger purity: need to do MUCH more! Optimize middle&low ranges: to do more (B group’s plan) Take crucial data for trigger improvement study: on going RunIIb threshold changes: on going! XFT upgrade: eager to see how much improvements ! Implement a few good new triggers along the way … Learn as much as we can before shutdown … on going Brain-storm on new ideas during shutdown (have a workshop?) (e.g. see the end of Alberto’s talk)…

16. One comment about table cleanup Last Aug. we did our first major table clean up, in Table 3_06, by removing junk triggers or clearly unused triggers. that helped us a lot! For details see: http://hep.uchicago.edu/~thliu/projects/TDWG/TDWG_July0805.pdf We still have >~ 130 L2 triggers, are ALL of them actually really used? Estimate: ~ 100 physicists actively doing analysis (or running CAF jobs?), many of them use the same triggers…. Backup triggers could cause trouble at high luminosity… and there are lots of them. Veronica will set up a web page with the list of the triggers in the current table, please take a look and “claim” the triggers you are really using… We will do this during the shutdown, and any unclaimed triggers will be dropped later.

17. A slide from last TDWG meeting (July 08), on Table cleaning Our table is 5 years old, designed > 7 years ago. Has been used to serve food for > 600 physicists (lots of them are poor, hungry and hardworking young postdoc and students). Over years, it has accumulated dust, food stain … it has been burned by high luminosity beam quite many times and broken into two pieces… “High Lumi Table” == “Panic Table” It is time to do a clean up, so the young people can eat healthy/clean food….

18. It has been a real team effort: Physics+Hardware+Software+Ops TDWG Heads: Kirsten and Ted Trigger Table Creation and Testing Coordinator: Veronica Sorin / Zeynep Gunay Technical Support: Trigger SPLs Vadim Rusu/Greg Feild/Veronique Boisvert Trigger Software Coordinator: Daniel Whiteson Trigger Database: Tom Wright / Donatella Torretta XMON: Charles Plager Retired Generals: Kevin and Jonathan RunIIb Committee: chaired by Luciano Trigger Representatives: Exotics Group: Vadim Rusu and Oscar Gonzalez Lopez QCD Group: Mary Convery, Gene Flanagan and Mario Campanelli Top Group: Veronique Boisvert and Ambra Gresele EWK Group: Jiyeon Han B Physics: Konstantin Anikeev and Simone Donati (with Rolf Oldeman) Hardware teams: Sili SPLs (Sebastian/Ankush/Marcel), SVT team(Alberto etc), EVB/L3 team (Markus), XTRP (Chris Marino) … Others: Chris Neu, Andrew Ivanov, Viktor Veszpremi, Bill Badgett, Peter Wilson, Carla Pilcher, Monica Tecchio, Camille Ginsburg … Thanks to all physics conveners, and ops managers.

19. How long it may take to reach 300E30? -- hard to predict, but can use data points from last year… Months taken to improve table vs its luminosity range 100E30 200E30 300E30 12 9 6 3 0 ~ 1 year from now Matches well with machine schedule 3_02 3_07 3_09 ?

20. Will there be an end? 3_09: GUT table Ultimate ideal goal: TOE (Table Of Everything) Is it possible? Probably not! But who could stop us from trying hard ?… at least @ the year of dog… (next year is pig…. so there could be an end after all !)